--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Demo/scripts/markov.py	Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,117 @@
+#! /usr/bin/env python
+
+class Markov:
+    def __init__(self, histsize, choice):
+        self.histsize = histsize
+        self.choice = choice
+        self.trans = {}
+    def add(self, state, next):
+        if not self.trans.has_key(state):
+            self.trans[state] = [next]
+        else:
+            self.trans[state].append(next)
+    def put(self, seq):
+        n = self.histsize
+        add = self.add
+        add(None, seq[:0])
+        for i in range(len(seq)):
+            add(seq[max(0, i-n):i], seq[i:i+1])
+        add(seq[len(seq)-n:], None)
+    def get(self):
+        choice = self.choice
+        trans = self.trans
+        n = self.histsize
+        seq = choice(trans[None])
+        while 1:
+            subseq = seq[max(0, len(seq)-n):]
+            options = trans[subseq]
+            next = choice(options)
+            if not next: break
+            seq = seq + next
+        return seq
+
+def test():
+    import sys, string, random, getopt
+    args = sys.argv[1:]
+    try:
+        opts, args = getopt.getopt(args, '0123456789cdw')
+    except getopt.error:
+        print 'Usage: markov [-#] [-cddqw] [file] ...'
+        print 'Options:'
+        print '-#: 1-digit history size (default 2)'
+        print '-c: characters (default)'
+        print '-w: words'
+        print '-d: more debugging output'
+        print '-q: no debugging output'
+        print 'Input files (default stdin) are split in paragraphs'
+        print 'separated blank lines and each paragraph is split'
+        print 'in words by whitespace, then reconcatenated with'
+        print 'exactly one space separating words.'
+        print 'Output consists of paragraphs separated by blank'
+        print 'lines, where lines are no longer than 72 characters.'
+    histsize = 2
+    do_words = 0
+    debug = 1
+    for o, a in opts:
+        if '-0' <= o <= '-9': histsize = eval(o[1:])
+        if o == '-c': do_words = 0
+        if o == '-d': debug = debug + 1
+        if o == '-q': debug = 0
+        if o == '-w': do_words = 1
+    if not args: args = ['-']
+    m = Markov(histsize, random.choice)
+    try:
+        for filename in args:
+            if filename == '-':
+                f = sys.stdin
+                if f.isatty():
+                    print 'Sorry, need stdin from file'
+                    continue
+            else:
+                f = open(filename, 'r')
+            if debug: print 'processing', filename, '...'
+            text = f.read()
+            f.close()
+            paralist = string.splitfields(text, '\n\n')
+            for para in paralist:
+                if debug > 1: print 'feeding ...'
+                words = string.split(para)
+                if words:
+                    if do_words: data = tuple(words)
+                    else: data = string.joinfields(words, ' ')
+                    m.put(data)
+    except KeyboardInterrupt:
+        print 'Interrupted -- continue with data read so far'
+    if not m.trans:
+        print 'No valid input files'
+        return
+    if debug: print 'done.'
+    if debug > 1:
+        for key in m.trans.keys():
+            if key is None or len(key) < histsize:
+                print repr(key), m.trans[key]
+        if histsize == 0: print repr(''), m.trans['']
+        print
+    while 1:
+        data = m.get()
+        if do_words: words = data
+        else: words = string.split(data)
+        n = 0
+        limit = 72
+        for w in words:
+            if n + len(w) > limit:
+                print
+                n = 0
+            print w,
+            n = n + len(w) + 1
+        print
+        print
+
+def tuple(list):
+    if len(list) == 0: return ()
+    if len(list) == 1: return (list[0],)
+    i = len(list)//2
+    return tuple(list[:i]) + tuple(list[i:])
+
+if __name__ == "__main__":
+    test()