--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-win32-2.6.1/lib/email/message.py Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,790 @@
+# Copyright (C) 2001-2006 Python Software Foundation
+# Author: Barry Warsaw
+# Contact: email-sig@python.org
+
+"""Basic message object for the email package object model."""
+
+__all__ = ['Message']
+
+import re
+import uu
+import binascii
+import warnings
+from cStringIO import StringIO
+
+# Intrapackage imports
+import email.charset
+from email import utils
+from email import errors
+
+SEMISPACE = '; '
+
+# Regular expression that matches `special' characters in parameters, the
+# existance of which force quoting of the parameter value.
+tspecials = re.compile(r'[ \(\)<>@,;:\\"/\[\]\?=]')
+
+
+# Helper functions
+def _splitparam(param):
+ # Split header parameters. BAW: this may be too simple. It isn't
+ # strictly RFC 2045 (section 5.1) compliant, but it catches most headers
+ # found in the wild. We may eventually need a full fledged parser
+ # eventually.
+ a, sep, b = param.partition(';')
+ if not sep:
+ return a.strip(), None
+ return a.strip(), b.strip()
+
+def _formatparam(param, value=None, quote=True):
+ """Convenience function to format and return a key=value pair.
+
+ This will quote the value if needed or if quote is true.
+ """
+ if value is not None and len(value) > 0:
+ # A tuple is used for RFC 2231 encoded parameter values where items
+ # are (charset, language, value). charset is a string, not a Charset
+ # instance.
+ if isinstance(value, tuple):
+ # Encode as per RFC 2231
+ param += '*'
+ value = utils.encode_rfc2231(value[2], value[0], value[1])
+ # BAW: Please check this. I think that if quote is set it should
+ # force quoting even if not necessary.
+ if quote or tspecials.search(value):
+ return '%s="%s"' % (param, utils.quote(value))
+ else:
+ return '%s=%s' % (param, value)
+ else:
+ return param
+
+def _parseparam(s):
+ plist = []
+ while s[:1] == ';':
+ s = s[1:]
+ end = s.find(';')
+ while end > 0 and s.count('"', 0, end) % 2:
+ end = s.find(';', end + 1)
+ if end < 0:
+ end = len(s)
+ f = s[:end]
+ if '=' in f:
+ i = f.index('=')
+ f = f[:i].strip().lower() + '=' + f[i+1:].strip()
+ plist.append(f.strip())
+ s = s[end:]
+ return plist
+
+
+def _unquotevalue(value):
+ # This is different than utils.collapse_rfc2231_value() because it doesn't
+ # try to convert the value to a unicode. Message.get_param() and
+ # Message.get_params() are both currently defined to return the tuple in
+ # the face of RFC 2231 parameters.
+ if isinstance(value, tuple):
+ return value[0], value[1], utils.unquote(value[2])
+ else:
+ return utils.unquote(value)
+
+
+
+class Message:
+ """Basic message object.
+
+ A message object is defined as something that has a bunch of RFC 2822
+ headers and a payload. It may optionally have an envelope header
+ (a.k.a. Unix-From or From_ header). If the message is a container (i.e. a
+ multipart or a message/rfc822), then the payload is a list of Message
+ objects, otherwise it is a string.
+
+ Message objects implement part of the `mapping' interface, which assumes
+ there is exactly one occurrance of the header per message. Some headers
+ do in fact appear multiple times (e.g. Received) and for those headers,
+ you must use the explicit API to set or get all the headers. Not all of
+ the mapping methods are implemented.
+ """
+ def __init__(self):
+ self._headers = []
+ self._unixfrom = None
+ self._payload = None
+ self._charset = None
+ # Defaults for multipart messages
+ self.preamble = self.epilogue = None
+ self.defects = []
+ # Default content type
+ self._default_type = 'text/plain'
+
+ def __str__(self):
+ """Return the entire formatted message as a string.
+ This includes the headers, body, and envelope header.
+ """
+ return self.as_string(unixfrom=True)
+
+ def as_string(self, unixfrom=False):
+ """Return the entire formatted message as a string.
+ Optional `unixfrom' when True, means include the Unix From_ envelope
+ header.
+
+ This is a convenience method and may not generate the message exactly
+ as you intend because by default it mangles lines that begin with
+ "From ". For more flexibility, use the flatten() method of a
+ Generator instance.
+ """
+ from email.Generator import Generator
+ fp = StringIO()
+ g = Generator(fp)
+ g.flatten(self, unixfrom=unixfrom)
+ return fp.getvalue()
+
+ def is_multipart(self):
+ """Return True if the message consists of multiple parts."""
+ return isinstance(self._payload, list)
+
+ #
+ # Unix From_ line
+ #
+ def set_unixfrom(self, unixfrom):
+ self._unixfrom = unixfrom
+
+ def get_unixfrom(self):
+ return self._unixfrom
+
+ #
+ # Payload manipulation.
+ #
+ def attach(self, payload):
+ """Add the given payload to the current payload.
+
+ The current payload will always be a list of objects after this method
+ is called. If you want to set the payload to a scalar object, use
+ set_payload() instead.
+ """
+ if self._payload is None:
+ self._payload = [payload]
+ else:
+ self._payload.append(payload)
+
+ def get_payload(self, i=None, decode=False):
+ """Return a reference to the payload.
+
+ The payload will either be a list object or a string. If you mutate
+ the list object, you modify the message's payload in place. Optional
+ i returns that index into the payload.
+
+ Optional decode is a flag indicating whether the payload should be
+ decoded or not, according to the Content-Transfer-Encoding header
+ (default is False).
+
+ When True and the message is not a multipart, the payload will be
+ decoded if this header's value is `quoted-printable' or `base64'. If
+ some other encoding is used, or the header is missing, or if the
+ payload has bogus data (i.e. bogus base64 or uuencoded data), the
+ payload is returned as-is.
+
+ If the message is a multipart and the decode flag is True, then None
+ is returned.
+ """
+ if i is None:
+ payload = self._payload
+ elif not isinstance(self._payload, list):
+ raise TypeError('Expected list, got %s' % type(self._payload))
+ else:
+ payload = self._payload[i]
+ if decode:
+ if self.is_multipart():
+ return None
+ cte = self.get('content-transfer-encoding', '').lower()
+ if cte == 'quoted-printable':
+ return utils._qdecode(payload)
+ elif cte == 'base64':
+ try:
+ return utils._bdecode(payload)
+ except binascii.Error:
+ # Incorrect padding
+ return payload
+ elif cte in ('x-uuencode', 'uuencode', 'uue', 'x-uue'):
+ sfp = StringIO()
+ try:
+ uu.decode(StringIO(payload+'\n'), sfp, quiet=True)
+ payload = sfp.getvalue()
+ except uu.Error:
+ # Some decoding problem
+ return payload
+ # Everything else, including encodings with 8bit or 7bit are returned
+ # unchanged.
+ return payload
+
+ def set_payload(self, payload, charset=None):
+ """Set the payload to the given value.
+
+ Optional charset sets the message's default character set. See
+ set_charset() for details.
+ """
+ self._payload = payload
+ if charset is not None:
+ self.set_charset(charset)
+
+ def set_charset(self, charset):
+ """Set the charset of the payload to a given character set.
+
+ charset can be a Charset instance, a string naming a character set, or
+ None. If it is a string it will be converted to a Charset instance.
+ If charset is None, the charset parameter will be removed from the
+ Content-Type field. Anything else will generate a TypeError.
+
+ The message will be assumed to be of type text/* encoded with
+ charset.input_charset. It will be converted to charset.output_charset
+ and encoded properly, if needed, when generating the plain text
+ representation of the message. MIME headers (MIME-Version,
+ Content-Type, Content-Transfer-Encoding) will be added as needed.
+
+ """
+ if charset is None:
+ self.del_param('charset')
+ self._charset = None
+ return
+ if isinstance(charset, basestring):
+ charset = email.charset.Charset(charset)
+ if not isinstance(charset, email.charset.Charset):
+ raise TypeError(charset)
+ # BAW: should we accept strings that can serve as arguments to the
+ # Charset constructor?
+ self._charset = charset
+ if not self.has_key('MIME-Version'):
+ self.add_header('MIME-Version', '1.0')
+ if not self.has_key('Content-Type'):
+ self.add_header('Content-Type', 'text/plain',
+ charset=charset.get_output_charset())
+ else:
+ self.set_param('charset', charset.get_output_charset())
+ if str(charset) != charset.get_output_charset():
+ self._payload = charset.body_encode(self._payload)
+ if not self.has_key('Content-Transfer-Encoding'):
+ cte = charset.get_body_encoding()
+ try:
+ cte(self)
+ except TypeError:
+ self._payload = charset.body_encode(self._payload)
+ self.add_header('Content-Transfer-Encoding', cte)
+
+ def get_charset(self):
+ """Return the Charset instance associated with the message's payload.
+ """
+ return self._charset
+
+ #
+ # MAPPING INTERFACE (partial)
+ #
+ def __len__(self):
+ """Return the total number of headers, including duplicates."""
+ return len(self._headers)
+
+ def __getitem__(self, name):
+ """Get a header value.
+
+ Return None if the header is missing instead of raising an exception.
+
+ Note that if the header appeared multiple times, exactly which
+ occurrance gets returned is undefined. Use get_all() to get all
+ the values matching a header field name.
+ """
+ return self.get(name)
+
+ def __setitem__(self, name, val):
+ """Set the value of a header.
+
+ Note: this does not overwrite an existing header with the same field
+ name. Use __delitem__() first to delete any existing headers.
+ """
+ self._headers.append((name, val))
+
+ def __delitem__(self, name):
+ """Delete all occurrences of a header, if present.
+
+ Does not raise an exception if the header is missing.
+ """
+ name = name.lower()
+ newheaders = []
+ for k, v in self._headers:
+ if k.lower() != name:
+ newheaders.append((k, v))
+ self._headers = newheaders
+
+ def __contains__(self, name):
+ return name.lower() in [k.lower() for k, v in self._headers]
+
+ def has_key(self, name):
+ """Return true if the message contains the header."""
+ missing = object()
+ return self.get(name, missing) is not missing
+
+ def keys(self):
+ """Return a list of all the message's header field names.
+
+ These will be sorted in the order they appeared in the original
+ message, or were added to the message, and may contain duplicates.
+ Any fields deleted and re-inserted are always appended to the header
+ list.
+ """
+ return [k for k, v in self._headers]
+
+ def values(self):
+ """Return a list of all the message's header values.
+
+ These will be sorted in the order they appeared in the original
+ message, or were added to the message, and may contain duplicates.
+ Any fields deleted and re-inserted are always appended to the header
+ list.
+ """
+ return [v for k, v in self._headers]
+
+ def items(self):
+ """Get all the message's header fields and values.
+
+ These will be sorted in the order they appeared in the original
+ message, or were added to the message, and may contain duplicates.
+ Any fields deleted and re-inserted are always appended to the header
+ list.
+ """
+ return self._headers[:]
+
+ def get(self, name, failobj=None):
+ """Get a header value.
+
+ Like __getitem__() but return failobj instead of None when the field
+ is missing.
+ """
+ name = name.lower()
+ for k, v in self._headers:
+ if k.lower() == name:
+ return v
+ return failobj
+
+ #
+ # Additional useful stuff
+ #
+
+ def get_all(self, name, failobj=None):
+ """Return a list of all the values for the named field.
+
+ These will be sorted in the order they appeared in the original
+ message, and may contain duplicates. Any fields deleted and
+ re-inserted are always appended to the header list.
+
+ If no such fields exist, failobj is returned (defaults to None).
+ """
+ values = []
+ name = name.lower()
+ for k, v in self._headers:
+ if k.lower() == name:
+ values.append(v)
+ if not values:
+ return failobj
+ return values
+
+ def add_header(self, _name, _value, **_params):
+ """Extended header setting.
+
+ name is the header field to add. keyword arguments can be used to set
+ additional parameters for the header field, with underscores converted
+ to dashes. Normally the parameter will be added as key="value" unless
+ value is None, in which case only the key will be added.
+
+ Example:
+
+ msg.add_header('content-disposition', 'attachment', filename='bud.gif')
+ """
+ parts = []
+ for k, v in _params.items():
+ if v is None:
+ parts.append(k.replace('_', '-'))
+ else:
+ parts.append(_formatparam(k.replace('_', '-'), v))
+ if _value is not None:
+ parts.insert(0, _value)
+ self._headers.append((_name, SEMISPACE.join(parts)))
+
+ def replace_header(self, _name, _value):
+ """Replace a header.
+
+ Replace the first matching header found in the message, retaining
+ header order and case. If no matching header was found, a KeyError is
+ raised.
+ """
+ _name = _name.lower()
+ for i, (k, v) in zip(range(len(self._headers)), self._headers):
+ if k.lower() == _name:
+ self._headers[i] = (k, _value)
+ break
+ else:
+ raise KeyError(_name)
+
+ #
+ # Use these three methods instead of the three above.
+ #
+
+ def get_content_type(self):
+ """Return the message's content type.
+
+ The returned string is coerced to lower case of the form
+ `maintype/subtype'. If there was no Content-Type header in the
+ message, the default type as given by get_default_type() will be
+ returned. Since according to RFC 2045, messages always have a default
+ type this will always return a value.
+
+ RFC 2045 defines a message's default type to be text/plain unless it
+ appears inside a multipart/digest container, in which case it would be
+ message/rfc822.
+ """
+ missing = object()
+ value = self.get('content-type', missing)
+ if value is missing:
+ # This should have no parameters
+ return self.get_default_type()
+ ctype = _splitparam(value)[0].lower()
+ # RFC 2045, section 5.2 says if its invalid, use text/plain
+ if ctype.count('/') != 1:
+ return 'text/plain'
+ return ctype
+
+ def get_content_maintype(self):
+ """Return the message's main content type.
+
+ This is the `maintype' part of the string returned by
+ get_content_type().
+ """
+ ctype = self.get_content_type()
+ return ctype.split('/')[0]
+
+ def get_content_subtype(self):
+ """Returns the message's sub-content type.
+
+ This is the `subtype' part of the string returned by
+ get_content_type().
+ """
+ ctype = self.get_content_type()
+ return ctype.split('/')[1]
+
+ def get_default_type(self):
+ """Return the `default' content type.
+
+ Most messages have a default content type of text/plain, except for
+ messages that are subparts of multipart/digest containers. Such
+ subparts have a default content type of message/rfc822.
+ """
+ return self._default_type
+
+ def set_default_type(self, ctype):
+ """Set the `default' content type.
+
+ ctype should be either "text/plain" or "message/rfc822", although this
+ is not enforced. The default content type is not stored in the
+ Content-Type header.
+ """
+ self._default_type = ctype
+
+ def _get_params_preserve(self, failobj, header):
+ # Like get_params() but preserves the quoting of values. BAW:
+ # should this be part of the public interface?
+ missing = object()
+ value = self.get(header, missing)
+ if value is missing:
+ return failobj
+ params = []
+ for p in _parseparam(';' + value):
+ try:
+ name, val = p.split('=', 1)
+ name = name.strip()
+ val = val.strip()
+ except ValueError:
+ # Must have been a bare attribute
+ name = p.strip()
+ val = ''
+ params.append((name, val))
+ params = utils.decode_params(params)
+ return params
+
+ def get_params(self, failobj=None, header='content-type', unquote=True):
+ """Return the message's Content-Type parameters, as a list.
+
+ The elements of the returned list are 2-tuples of key/value pairs, as
+ split on the `=' sign. The left hand side of the `=' is the key,
+ while the right hand side is the value. If there is no `=' sign in
+ the parameter the value is the empty string. The value is as
+ described in the get_param() method.
+
+ Optional failobj is the object to return if there is no Content-Type
+ header. Optional header is the header to search instead of
+ Content-Type. If unquote is True, the value is unquoted.
+ """
+ missing = object()
+ params = self._get_params_preserve(missing, header)
+ if params is missing:
+ return failobj
+ if unquote:
+ return [(k, _unquotevalue(v)) for k, v in params]
+ else:
+ return params
+
+ def get_param(self, param, failobj=None, header='content-type',
+ unquote=True):
+ """Return the parameter value if found in the Content-Type header.
+
+ Optional failobj is the object to return if there is no Content-Type
+ header, or the Content-Type header has no such parameter. Optional
+ header is the header to search instead of Content-Type.
+
+ Parameter keys are always compared case insensitively. The return
+ value can either be a string, or a 3-tuple if the parameter was RFC
+ 2231 encoded. When it's a 3-tuple, the elements of the value are of
+ the form (CHARSET, LANGUAGE, VALUE). Note that both CHARSET and
+ LANGUAGE can be None, in which case you should consider VALUE to be
+ encoded in the us-ascii charset. You can usually ignore LANGUAGE.
+
+ Your application should be prepared to deal with 3-tuple return
+ values, and can convert the parameter to a Unicode string like so:
+
+ param = msg.get_param('foo')
+ if isinstance(param, tuple):
+ param = unicode(param[2], param[0] or 'us-ascii')
+
+ In any case, the parameter value (either the returned string, or the
+ VALUE item in the 3-tuple) is always unquoted, unless unquote is set
+ to False.
+ """
+ if not self.has_key(header):
+ return failobj
+ for k, v in self._get_params_preserve(failobj, header):
+ if k.lower() == param.lower():
+ if unquote:
+ return _unquotevalue(v)
+ else:
+ return v
+ return failobj
+
+ def set_param(self, param, value, header='Content-Type', requote=True,
+ charset=None, language=''):
+ """Set a parameter in the Content-Type header.
+
+ If the parameter already exists in the header, its value will be
+ replaced with the new value.
+
+ If header is Content-Type and has not yet been defined for this
+ message, it will be set to "text/plain" and the new parameter and
+ value will be appended as per RFC 2045.
+
+ An alternate header can specified in the header argument, and all
+ parameters will be quoted as necessary unless requote is False.
+
+ If charset is specified, the parameter will be encoded according to RFC
+ 2231. Optional language specifies the RFC 2231 language, defaulting
+ to the empty string. Both charset and language should be strings.
+ """
+ if not isinstance(value, tuple) and charset:
+ value = (charset, language, value)
+
+ if not self.has_key(header) and header.lower() == 'content-type':
+ ctype = 'text/plain'
+ else:
+ ctype = self.get(header)
+ if not self.get_param(param, header=header):
+ if not ctype:
+ ctype = _formatparam(param, value, requote)
+ else:
+ ctype = SEMISPACE.join(
+ [ctype, _formatparam(param, value, requote)])
+ else:
+ ctype = ''
+ for old_param, old_value in self.get_params(header=header,
+ unquote=requote):
+ append_param = ''
+ if old_param.lower() == param.lower():
+ append_param = _formatparam(param, value, requote)
+ else:
+ append_param = _formatparam(old_param, old_value, requote)
+ if not ctype:
+ ctype = append_param
+ else:
+ ctype = SEMISPACE.join([ctype, append_param])
+ if ctype != self.get(header):
+ del self[header]
+ self[header] = ctype
+
+ def del_param(self, param, header='content-type', requote=True):
+ """Remove the given parameter completely from the Content-Type header.
+
+ The header will be re-written in place without the parameter or its
+ value. All values will be quoted as necessary unless requote is
+ False. Optional header specifies an alternative to the Content-Type
+ header.
+ """
+ if not self.has_key(header):
+ return
+ new_ctype = ''
+ for p, v in self.get_params(header=header, unquote=requote):
+ if p.lower() != param.lower():
+ if not new_ctype:
+ new_ctype = _formatparam(p, v, requote)
+ else:
+ new_ctype = SEMISPACE.join([new_ctype,
+ _formatparam(p, v, requote)])
+ if new_ctype != self.get(header):
+ del self[header]
+ self[header] = new_ctype
+
+ def set_type(self, type, header='Content-Type', requote=True):
+ """Set the main type and subtype for the Content-Type header.
+
+ type must be a string in the form "maintype/subtype", otherwise a
+ ValueError is raised.
+
+ This method replaces the Content-Type header, keeping all the
+ parameters in place. If requote is False, this leaves the existing
+ header's quoting as is. Otherwise, the parameters will be quoted (the
+ default).
+
+ An alternative header can be specified in the header argument. When
+ the Content-Type header is set, we'll always also add a MIME-Version
+ header.
+ """
+ # BAW: should we be strict?
+ if not type.count('/') == 1:
+ raise ValueError
+ # Set the Content-Type, you get a MIME-Version
+ if header.lower() == 'content-type':
+ del self['mime-version']
+ self['MIME-Version'] = '1.0'
+ if not self.has_key(header):
+ self[header] = type
+ return
+ params = self.get_params(header=header, unquote=requote)
+ del self[header]
+ self[header] = type
+ # Skip the first param; it's the old type.
+ for p, v in params[1:]:
+ self.set_param(p, v, header, requote)
+
+ def get_filename(self, failobj=None):
+ """Return the filename associated with the payload if present.
+
+ The filename is extracted from the Content-Disposition header's
+ `filename' parameter, and it is unquoted. If that header is missing
+ the `filename' parameter, this method falls back to looking for the
+ `name' parameter.
+ """
+ missing = object()
+ filename = self.get_param('filename', missing, 'content-disposition')
+ if filename is missing:
+ filename = self.get_param('name', missing, 'content-disposition')
+ if filename is missing:
+ return failobj
+ return utils.collapse_rfc2231_value(filename).strip()
+
+ def get_boundary(self, failobj=None):
+ """Return the boundary associated with the payload if present.
+
+ The boundary is extracted from the Content-Type header's `boundary'
+ parameter, and it is unquoted.
+ """
+ missing = object()
+ boundary = self.get_param('boundary', missing)
+ if boundary is missing:
+ return failobj
+ # RFC 2046 says that boundaries may begin but not end in w/s
+ return utils.collapse_rfc2231_value(boundary).rstrip()
+
+ def set_boundary(self, boundary):
+ """Set the boundary parameter in Content-Type to 'boundary'.
+
+ This is subtly different than deleting the Content-Type header and
+ adding a new one with a new boundary parameter via add_header(). The
+ main difference is that using the set_boundary() method preserves the
+ order of the Content-Type header in the original message.
+
+ HeaderParseError is raised if the message has no Content-Type header.
+ """
+ missing = object()
+ params = self._get_params_preserve(missing, 'content-type')
+ if params is missing:
+ # There was no Content-Type header, and we don't know what type
+ # to set it to, so raise an exception.
+ raise errors.HeaderParseError('No Content-Type header found')
+ newparams = []
+ foundp = False
+ for pk, pv in params:
+ if pk.lower() == 'boundary':
+ newparams.append(('boundary', '"%s"' % boundary))
+ foundp = True
+ else:
+ newparams.append((pk, pv))
+ if not foundp:
+ # The original Content-Type header had no boundary attribute.
+ # Tack one on the end. BAW: should we raise an exception
+ # instead???
+ newparams.append(('boundary', '"%s"' % boundary))
+ # Replace the existing Content-Type header with the new value
+ newheaders = []
+ for h, v in self._headers:
+ if h.lower() == 'content-type':
+ parts = []
+ for k, v in newparams:
+ if v == '':
+ parts.append(k)
+ else:
+ parts.append('%s=%s' % (k, v))
+ newheaders.append((h, SEMISPACE.join(parts)))
+
+ else:
+ newheaders.append((h, v))
+ self._headers = newheaders
+
+ def get_content_charset(self, failobj=None):
+ """Return the charset parameter of the Content-Type header.
+
+ The returned string is always coerced to lower case. If there is no
+ Content-Type header, or if that header has no charset parameter,
+ failobj is returned.
+ """
+ missing = object()
+ charset = self.get_param('charset', missing)
+ if charset is missing:
+ return failobj
+ if isinstance(charset, tuple):
+ # RFC 2231 encoded, so decode it, and it better end up as ascii.
+ pcharset = charset[0] or 'us-ascii'
+ try:
+ # LookupError will be raised if the charset isn't known to
+ # Python. UnicodeError will be raised if the encoded text
+ # contains a character not in the charset.
+ charset = unicode(charset[2], pcharset).encode('us-ascii')
+ except (LookupError, UnicodeError):
+ charset = charset[2]
+ # charset character must be in us-ascii range
+ try:
+ if isinstance(charset, str):
+ charset = unicode(charset, 'us-ascii')
+ charset = charset.encode('us-ascii')
+ except UnicodeError:
+ return failobj
+ # RFC 2046, $4.1.2 says charsets are not case sensitive
+ return charset.lower()
+
+ def get_charsets(self, failobj=None):
+ """Return a list containing the charset(s) used in this message.
+
+ The returned list of items describes the Content-Type headers'
+ charset parameter for this message and all the subparts in its
+ payload.
+
+ Each item will either be a string (the value of the charset parameter
+ in the Content-Type header of that part) or the value of the
+ 'failobj' parameter (defaults to None), if the part does not have a
+ main MIME type of "text", or the charset is not defined.
+
+ The list will contain one string for each part of the message, plus
+ one for the container message (i.e. self), so that a non-multipart
+ message will still return a list of length 1.
+ """
+ return [part.get_content_charset(failobj) for part in self.walk()]
+
+ # I.e. def walk(self): ...
+ from email.Iterators import walk