author | jjkang |
Fri, 11 Jun 2010 15:22:40 +0800 | |
changeset 2 | 9da1e5517a66 |
parent 0 | ae805ac0140d |
permissions | -rw-r--r-- |
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"""A collection of string operations (most are no longer used). |
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Warning: most of the code you see here isn't normally used nowadays. |
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Beginning with Python 1.6, many of these functions are implemented as |
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methods on the standard string object. They used to be implemented by |
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a built-in module called strop, but strop is now obsolete itself. |
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Public module variables: |
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whitespace -- a string containing all characters considered whitespace |
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lowercase -- a string containing all characters considered lowercase letters |
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uppercase -- a string containing all characters considered uppercase letters |
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letters -- a string containing all characters considered letters |
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digits -- a string containing all characters considered decimal digits |
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hexdigits -- a string containing all characters considered hexadecimal digits |
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octdigits -- a string containing all characters considered octal digits |
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punctuation -- a string containing all characters considered punctuation |
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printable -- a string containing all characters considered printable |
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""" |
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# Some strings for ctype-style character classification |
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whitespace = ' \t\n\r\v\f' |
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lowercase = 'abcdefghijklmnopqrstuvwxyz' |
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uppercase = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' |
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letters = lowercase + uppercase |
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ascii_lowercase = lowercase |
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ascii_uppercase = uppercase |
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ascii_letters = ascii_lowercase + ascii_uppercase |
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digits = '0123456789' |
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hexdigits = digits + 'abcdef' + 'ABCDEF' |
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octdigits = '01234567' |
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punctuation = """!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~""" |
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printable = digits + letters + punctuation + whitespace |
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# Case conversion helpers |
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# Use str to convert Unicode literal in case of -U |
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l = map(chr, xrange(256)) |
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_idmap = str('').join(l) |
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del l |
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# Functions which aren't available as string methods. |
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# Capitalize the words in a string, e.g. " aBc dEf " -> "Abc Def". |
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def capwords(s, sep=None): |
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"""capwords(s, [sep]) -> string |
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Split the argument into words using split, capitalize each |
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word using capitalize, and join the capitalized words using |
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join. Note that this replaces runs of whitespace characters by |
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a single space. |
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""" |
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return (sep or ' ').join([x.capitalize() for x in s.split(sep)]) |
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# Construct a translation string |
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_idmapL = None |
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def maketrans(fromstr, tostr): |
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"""maketrans(frm, to) -> string |
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Return a translation table (a string of 256 bytes long) |
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suitable for use in string.translate. The strings frm and to |
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must be of the same length. |
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""" |
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if len(fromstr) != len(tostr): |
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raise ValueError, "maketrans arguments must have same length" |
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global _idmapL |
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if not _idmapL: |
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_idmapL = map(None, _idmap) |
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L = _idmapL[:] |
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fromstr = map(ord, fromstr) |
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for i in range(len(fromstr)): |
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L[fromstr[i]] = tostr[i] |
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return ''.join(L) |
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#################################################################### |
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import re as _re |
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class _multimap: |
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"""Helper class for combining multiple mappings. |
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Used by .{safe_,}substitute() to combine the mapping and keyword |
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arguments. |
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""" |
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def __init__(self, primary, secondary): |
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self._primary = primary |
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self._secondary = secondary |
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def __getitem__(self, key): |
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try: |
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return self._primary[key] |
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except KeyError: |
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return self._secondary[key] |
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class _TemplateMetaclass(type): |
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pattern = r""" |
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%(delim)s(?: |
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(?P<escaped>%(delim)s) | # Escape sequence of two delimiters |
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(?P<named>%(id)s) | # delimiter and a Python identifier |
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{(?P<braced>%(id)s)} | # delimiter and a braced identifier |
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(?P<invalid>) # Other ill-formed delimiter exprs |
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) |
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""" |
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def __init__(cls, name, bases, dct): |
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super(_TemplateMetaclass, cls).__init__(name, bases, dct) |
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if 'pattern' in dct: |
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pattern = cls.pattern |
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else: |
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pattern = _TemplateMetaclass.pattern % { |
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'delim' : _re.escape(cls.delimiter), |
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'id' : cls.idpattern, |
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} |
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cls.pattern = _re.compile(pattern, _re.IGNORECASE | _re.VERBOSE) |
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class Template: |
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123 |
"""A string class for supporting $-substitutions.""" |
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124 |
__metaclass__ = _TemplateMetaclass |
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125 |
|
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126 |
delimiter = '$' |
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127 |
idpattern = r'[_a-z][_a-z0-9]*' |
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128 |
|
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129 |
def __init__(self, template): |
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130 |
self.template = template |
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131 |
|
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132 |
# Search for $$, $identifier, ${identifier}, and any bare $'s |
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133 |
|
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134 |
def _invalid(self, mo): |
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135 |
i = mo.start('invalid') |
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136 |
lines = self.template[:i].splitlines(True) |
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137 |
if not lines: |
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138 |
colno = 1 |
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139 |
lineno = 1 |
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140 |
else: |
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141 |
colno = i - len(''.join(lines[:-1])) |
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142 |
lineno = len(lines) |
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143 |
raise ValueError('Invalid placeholder in string: line %d, col %d' % |
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144 |
(lineno, colno)) |
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145 |
|
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146 |
def substitute(self, *args, **kws): |
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147 |
if len(args) > 1: |
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148 |
raise TypeError('Too many positional arguments') |
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149 |
if not args: |
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150 |
mapping = kws |
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151 |
elif kws: |
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152 |
mapping = _multimap(kws, args[0]) |
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153 |
else: |
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154 |
mapping = args[0] |
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155 |
# Helper function for .sub() |
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156 |
def convert(mo): |
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157 |
# Check the most common path first. |
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158 |
named = mo.group('named') or mo.group('braced') |
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159 |
if named is not None: |
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160 |
val = mapping[named] |
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161 |
# We use this idiom instead of str() because the latter will |
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162 |
# fail if val is a Unicode containing non-ASCII characters. |
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163 |
return '%s' % (val,) |
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164 |
if mo.group('escaped') is not None: |
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165 |
return self.delimiter |
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166 |
if mo.group('invalid') is not None: |
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167 |
self._invalid(mo) |
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168 |
raise ValueError('Unrecognized named group in pattern', |
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169 |
self.pattern) |
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170 |
return self.pattern.sub(convert, self.template) |
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171 |
|
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172 |
def safe_substitute(self, *args, **kws): |
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173 |
if len(args) > 1: |
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174 |
raise TypeError('Too many positional arguments') |
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175 |
if not args: |
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176 |
mapping = kws |
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177 |
elif kws: |
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178 |
mapping = _multimap(kws, args[0]) |
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179 |
else: |
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180 |
mapping = args[0] |
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181 |
# Helper function for .sub() |
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182 |
def convert(mo): |
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183 |
named = mo.group('named') |
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184 |
if named is not None: |
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185 |
try: |
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186 |
# We use this idiom instead of str() because the latter |
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187 |
# will fail if val is a Unicode containing non-ASCII |
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188 |
return '%s' % (mapping[named],) |
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189 |
except KeyError: |
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190 |
return self.delimiter + named |
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191 |
braced = mo.group('braced') |
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192 |
if braced is not None: |
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193 |
try: |
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194 |
return '%s' % (mapping[braced],) |
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195 |
except KeyError: |
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196 |
return self.delimiter + '{' + braced + '}' |
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197 |
if mo.group('escaped') is not None: |
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198 |
return self.delimiter |
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199 |
if mo.group('invalid') is not None: |
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200 |
return self.delimiter |
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201 |
raise ValueError('Unrecognized named group in pattern', |
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202 |
self.pattern) |
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203 |
return self.pattern.sub(convert, self.template) |
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204 |
|
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205 |
|
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206 |
|
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207 |
#################################################################### |
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208 |
# NOTE: Everything below here is deprecated. Use string methods instead. |
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209 |
# This stuff will go away in Python 3.0. |
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210 |
|
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211 |
# Backward compatible names for exceptions |
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212 |
index_error = ValueError |
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213 |
atoi_error = ValueError |
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214 |
atof_error = ValueError |
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215 |
atol_error = ValueError |
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216 |
|
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217 |
# convert UPPER CASE letters to lower case |
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218 |
def lower(s): |
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219 |
"""lower(s) -> string |
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220 |
|
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221 |
Return a copy of the string s converted to lowercase. |
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222 |
|
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223 |
""" |
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224 |
return s.lower() |
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225 |
|
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226 |
# Convert lower case letters to UPPER CASE |
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227 |
def upper(s): |
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228 |
"""upper(s) -> string |
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229 |
|
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230 |
Return a copy of the string s converted to uppercase. |
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231 |
|
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232 |
""" |
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233 |
return s.upper() |
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234 |
|
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235 |
# Swap lower case letters and UPPER CASE |
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236 |
def swapcase(s): |
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237 |
"""swapcase(s) -> string |
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238 |
|
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239 |
Return a copy of the string s with upper case characters |
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240 |
converted to lowercase and vice versa. |
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241 |
|
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242 |
""" |
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243 |
return s.swapcase() |
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244 |
|
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245 |
# Strip leading and trailing tabs and spaces |
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246 |
def strip(s, chars=None): |
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247 |
"""strip(s [,chars]) -> string |
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248 |
|
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249 |
Return a copy of the string s with leading and trailing |
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250 |
whitespace removed. |
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251 |
If chars is given and not None, remove characters in chars instead. |
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252 |
If chars is unicode, S will be converted to unicode before stripping. |
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253 |
|
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254 |
""" |
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255 |
return s.strip(chars) |
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256 |
|
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257 |
# Strip leading tabs and spaces |
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258 |
def lstrip(s, chars=None): |
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259 |
"""lstrip(s [,chars]) -> string |
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260 |
|
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261 |
Return a copy of the string s with leading whitespace removed. |
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262 |
If chars is given and not None, remove characters in chars instead. |
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263 |
|
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264 |
""" |
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265 |
return s.lstrip(chars) |
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266 |
|
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267 |
# Strip trailing tabs and spaces |
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268 |
def rstrip(s, chars=None): |
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269 |
"""rstrip(s [,chars]) -> string |
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270 |
|
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271 |
Return a copy of the string s with trailing whitespace removed. |
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272 |
If chars is given and not None, remove characters in chars instead. |
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273 |
|
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274 |
""" |
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275 |
return s.rstrip(chars) |
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276 |
|
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277 |
|
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278 |
# Split a string into a list of space/tab-separated words |
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279 |
def split(s, sep=None, maxsplit=-1): |
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280 |
"""split(s [,sep [,maxsplit]]) -> list of strings |
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281 |
|
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282 |
Return a list of the words in the string s, using sep as the |
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283 |
delimiter string. If maxsplit is given, splits at no more than |
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|
284 |
maxsplit places (resulting in at most maxsplit+1 words). If sep |
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285 |
is not specified or is None, any whitespace string is a separator. |
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|
286 |
|
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287 |
(split and splitfields are synonymous) |
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288 |
|
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289 |
""" |
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290 |
return s.split(sep, maxsplit) |
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291 |
splitfields = split |
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292 |
|
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293 |
# Split a string into a list of space/tab-separated words |
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294 |
def rsplit(s, sep=None, maxsplit=-1): |
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295 |
"""rsplit(s [,sep [,maxsplit]]) -> list of strings |
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296 |
|
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297 |
Return a list of the words in the string s, using sep as the |
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|
298 |
delimiter string, starting at the end of the string and working |
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|
299 |
to the front. If maxsplit is given, at most maxsplit splits are |
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300 |
done. If sep is not specified or is None, any whitespace string |
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301 |
is a separator. |
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|
302 |
""" |
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|
303 |
return s.rsplit(sep, maxsplit) |
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304 |
|
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|
305 |
# Join fields with optional separator |
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|
306 |
def join(words, sep = ' '): |
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307 |
"""join(list [,sep]) -> string |
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308 |
|
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309 |
Return a string composed of the words in list, with |
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310 |
intervening occurrences of sep. The default separator is a |
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|
311 |
single space. |
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|
312 |
|
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313 |
(joinfields and join are synonymous) |
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|
314 |
|
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|
315 |
""" |
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|
316 |
return sep.join(words) |
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|
317 |
joinfields = join |
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|
318 |
|
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|
319 |
# Find substring, raise exception if not found |
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320 |
def index(s, *args): |
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321 |
"""index(s, sub [,start [,end]]) -> int |
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|
322 |
|
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|
323 |
Like find but raises ValueError when the substring is not found. |
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|
324 |
|
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|
325 |
""" |
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|
326 |
return s.index(*args) |
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|
327 |
|
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|
328 |
# Find last substring, raise exception if not found |
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|
329 |
def rindex(s, *args): |
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330 |
"""rindex(s, sub [,start [,end]]) -> int |
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|
331 |
|
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|
332 |
Like rfind but raises ValueError when the substring is not found. |
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|
333 |
|
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|
334 |
""" |
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|
335 |
return s.rindex(*args) |
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|
336 |
|
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|
337 |
# Count non-overlapping occurrences of substring |
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|
338 |
def count(s, *args): |
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|
339 |
"""count(s, sub[, start[,end]]) -> int |
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|
340 |
|
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|
341 |
Return the number of occurrences of substring sub in string |
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|
342 |
s[start:end]. Optional arguments start and end are |
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|
343 |
interpreted as in slice notation. |
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|
344 |
|
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|
345 |
""" |
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|
346 |
return s.count(*args) |
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|
347 |
|
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|
348 |
# Find substring, return -1 if not found |
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|
349 |
def find(s, *args): |
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|
350 |
"""find(s, sub [,start [,end]]) -> in |
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|
351 |
|
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|
352 |
Return the lowest index in s where substring sub is found, |
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|
353 |
such that sub is contained within s[start,end]. Optional |
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|
354 |
arguments start and end are interpreted as in slice notation. |
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|
355 |
|
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|
356 |
Return -1 on failure. |
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|
357 |
|
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|
358 |
""" |
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|
359 |
return s.find(*args) |
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|
360 |
|
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|
361 |
# Find last substring, return -1 if not found |
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|
362 |
def rfind(s, *args): |
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|
363 |
"""rfind(s, sub [,start [,end]]) -> int |
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|
364 |
|
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|
365 |
Return the highest index in s where substring sub is found, |
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|
366 |
such that sub is contained within s[start,end]. Optional |
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|
367 |
arguments start and end are interpreted as in slice notation. |
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|
368 |
|
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|
369 |
Return -1 on failure. |
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|
370 |
|
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|
371 |
""" |
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|
372 |
return s.rfind(*args) |
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|
373 |
|
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|
374 |
# for a bit of speed |
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|
375 |
_float = float |
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diff
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|
376 |
_int = int |
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parents:
diff
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|
377 |
_long = long |
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parents:
diff
changeset
|
378 |
|
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parents:
diff
changeset
|
379 |
# Convert string to float |
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parents:
diff
changeset
|
380 |
def atof(s): |
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parents:
diff
changeset
|
381 |
"""atof(s) -> float |
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parents:
diff
changeset
|
382 |
|
ae805ac0140d
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parents:
diff
changeset
|
383 |
Return the floating point number represented by the string s. |
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DP tools release version Revision: 200912
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parents:
diff
changeset
|
384 |
|
ae805ac0140d
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parents:
diff
changeset
|
385 |
""" |
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parents:
diff
changeset
|
386 |
return _float(s) |
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parents:
diff
changeset
|
387 |
|
ae805ac0140d
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parents:
diff
changeset
|
388 |
|
ae805ac0140d
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parents:
diff
changeset
|
389 |
# Convert string to integer |
ae805ac0140d
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parents:
diff
changeset
|
390 |
def atoi(s , base=10): |
ae805ac0140d
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parents:
diff
changeset
|
391 |
"""atoi(s [,base]) -> int |
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DP tools release version Revision: 200912
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parents:
diff
changeset
|
392 |
|
ae805ac0140d
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parents:
diff
changeset
|
393 |
Return the integer represented by the string s in the given |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
394 |
base, which defaults to 10. The string s must consist of one |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
395 |
or more digits, possibly preceded by a sign. If base is 0, it |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
396 |
is chosen from the leading characters of s, 0 for octal, 0x or |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
397 |
0X for hexadecimal. If base is 16, a preceding 0x or 0X is |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
398 |
accepted. |
ae805ac0140d
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parents:
diff
changeset
|
399 |
|
ae805ac0140d
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parents:
diff
changeset
|
400 |
""" |
ae805ac0140d
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parents:
diff
changeset
|
401 |
return _int(s, base) |
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DP tools release version Revision: 200912
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parents:
diff
changeset
|
402 |
|
ae805ac0140d
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parents:
diff
changeset
|
403 |
|
ae805ac0140d
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parents:
diff
changeset
|
404 |
# Convert string to long integer |
ae805ac0140d
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parents:
diff
changeset
|
405 |
def atol(s, base=10): |
ae805ac0140d
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parents:
diff
changeset
|
406 |
"""atol(s [,base]) -> long |
ae805ac0140d
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parents:
diff
changeset
|
407 |
|
ae805ac0140d
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parents:
diff
changeset
|
408 |
Return the long integer represented by the string s in the |
ae805ac0140d
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parents:
diff
changeset
|
409 |
given base, which defaults to 10. The string s must consist |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
410 |
of one or more digits, possibly preceded by a sign. If base |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
411 |
is 0, it is chosen from the leading characters of s, 0 for |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
412 |
octal, 0x or 0X for hexadecimal. If base is 16, a preceding |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
413 |
0x or 0X is accepted. A trailing L or l is not accepted, |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
414 |
unless base is 0. |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
415 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
416 |
""" |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
417 |
return _long(s, base) |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
418 |
|
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
419 |
|
ae805ac0140d
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parents:
diff
changeset
|
420 |
# Left-justify a string |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
421 |
def ljust(s, width, *args): |
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parents:
diff
changeset
|
422 |
"""ljust(s, width[, fillchar]) -> string |
ae805ac0140d
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parents:
diff
changeset
|
423 |
|
ae805ac0140d
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parents:
diff
changeset
|
424 |
Return a left-justified version of s, in a field of the |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
425 |
specified width, padded with spaces as needed. The string is |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
426 |
never truncated. If specified the fillchar is used instead of spaces. |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
427 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
428 |
""" |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
429 |
return s.ljust(width, *args) |
ae805ac0140d
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parents:
diff
changeset
|
430 |
|
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
431 |
# Right-justify a string |
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parents:
diff
changeset
|
432 |
def rjust(s, width, *args): |
ae805ac0140d
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parents:
diff
changeset
|
433 |
"""rjust(s, width[, fillchar]) -> string |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
434 |
|
ae805ac0140d
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parents:
diff
changeset
|
435 |
Return a right-justified version of s, in a field of the |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
436 |
specified width, padded with spaces as needed. The string is |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
437 |
never truncated. If specified the fillchar is used instead of spaces. |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
438 |
|
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
439 |
""" |
ae805ac0140d
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parents:
diff
changeset
|
440 |
return s.rjust(width, *args) |
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parents:
diff
changeset
|
441 |
|
ae805ac0140d
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parents:
diff
changeset
|
442 |
# Center a string |
ae805ac0140d
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parents:
diff
changeset
|
443 |
def center(s, width, *args): |
ae805ac0140d
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parents:
diff
changeset
|
444 |
"""center(s, width[, fillchar]) -> string |
ae805ac0140d
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parents:
diff
changeset
|
445 |
|
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
446 |
Return a center version of s, in a field of the specified |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
447 |
width. padded with spaces as needed. The string is never |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
448 |
truncated. If specified the fillchar is used instead of spaces. |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
449 |
|
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
450 |
""" |
ae805ac0140d
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parents:
diff
changeset
|
451 |
return s.center(width, *args) |
ae805ac0140d
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parents:
diff
changeset
|
452 |
|
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
453 |
# Zero-fill a number, e.g., (12, 3) --> '012' and (-3, 3) --> '-03' |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
454 |
# Decadent feature: the argument may be a string or a number |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
455 |
# (Use of this is deprecated; it should be a string as with ljust c.s.) |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
456 |
def zfill(x, width): |
ae805ac0140d
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parents:
diff
changeset
|
457 |
"""zfill(x, width) -> string |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
458 |
|
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
459 |
Pad a numeric string x with zeros on the left, to fill a field |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
460 |
of the specified width. The string x is never truncated. |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
461 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
462 |
""" |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
463 |
if not isinstance(x, basestring): |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
464 |
x = repr(x) |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
465 |
return x.zfill(width) |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
466 |
|
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
467 |
# Expand tabs in a string. |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
468 |
# Doesn't take non-printing chars into account, but does understand \n. |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
469 |
def expandtabs(s, tabsize=8): |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
470 |
"""expandtabs(s [,tabsize]) -> string |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
471 |
|
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
472 |
Return a copy of the string s with all tab characters replaced |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
473 |
by the appropriate number of spaces, depending on the current |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
474 |
column, and the tabsize (default 8). |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
475 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
476 |
""" |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
477 |
return s.expandtabs(tabsize) |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
478 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
479 |
# Character translation through look-up table. |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
480 |
def translate(s, table, deletions=""): |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
481 |
"""translate(s,table [,deletions]) -> string |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
482 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
483 |
Return a copy of the string s, where all characters occurring |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
484 |
in the optional argument deletions are removed, and the |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
485 |
remaining characters have been mapped through the given |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
486 |
translation table, which must be a string of length 256. The |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
487 |
deletions argument is not allowed for Unicode strings. |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
488 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
489 |
""" |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
diff
changeset
|
490 |
if deletions: |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
491 |
return s.translate(table, deletions) |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
492 |
else: |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
493 |
# Add s[:0] so that if s is Unicode and table is an 8-bit string, |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
494 |
# table is converted to Unicode. This means that table *cannot* |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
495 |
# be a dictionary -- for that feature, use u.translate() directly. |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
496 |
return s.translate(table + s[:0]) |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
497 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
498 |
# Capitalize a string, e.g. "aBc dEf" -> "Abc def". |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
499 |
def capitalize(s): |
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DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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500 |
"""capitalize(s) -> string |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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|
501 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
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|
502 |
Return a copy of the string s with only its first character |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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|
503 |
capitalized. |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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|
504 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
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|
505 |
""" |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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|
506 |
return s.capitalize() |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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changeset
|
507 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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|
508 |
# Substring replacement (global) |
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DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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|
509 |
def replace(s, old, new, maxsplit=-1): |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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510 |
"""replace (str, old, new[, maxsplit]) -> string |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
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|
511 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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|
512 |
Return a copy of string str with all occurrences of substring |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
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changeset
|
513 |
old replaced by new. If the optional argument maxsplit is |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
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|
514 |
given, only the first maxsplit occurrences are replaced. |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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|
515 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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|
516 |
""" |
ae805ac0140d
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|
517 |
return s.replace(old, new, maxsplit) |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
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|
518 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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|
519 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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|
520 |
# Try importing optional built-in module "strop" -- if it exists, |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
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|
521 |
# it redefines some string operations that are 100-1000 times faster. |
ae805ac0140d
DP tools release version Revision: 200912
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parents:
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|
522 |
# It also defines values for whitespace, lowercase and uppercase |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
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|
523 |
# that match <ctype.h>'s definitions. |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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|
524 |
|
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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|
525 |
try: |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
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|
526 |
from strop import maketrans, lowercase, uppercase, whitespace |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
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|
527 |
letters = lowercase + uppercase |
ae805ac0140d
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
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|
528 |
except ImportError: |
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DP tools release version Revision: 200912
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|
529 |
pass # Use the original versions |