--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/data_generation/transformations/pycaptcha/Captcha/Words.py	Fri Feb 26 14:15:38 2010 -0500
@@ -0,0 +1,58 @@
+""" Captcha.Words
+
+Utilities for managing word lists and finding random words
+"""
+#
+# PyCAPTCHA Package
+# Copyright (C) 2004 Micah Dowty <micah@navi.cx>
+#
+
+import random, os
+import File
+
+
+class WordList(object):
+    """A class representing a word list read from disk lazily.
+       Blank lines and comment lines starting with '#' are ignored.
+       Any number of words per line may be used. The list can
+       optionally ingore words not within a given length range.
+       """
+    def __init__(self, fileName, minLength=None, maxLength=None):
+        self.words = None
+        self.fileName = fileName
+        self.minLength = minLength
+        self.maxLength = maxLength
+
+    def read(self):
+        """Read words from disk"""
+        f = open(os.path.join(File.dataDir, "words", self.fileName))
+
+        self.words = []
+        for line in f.xreadlines():
+            line = line.strip()
+            if not line:
+                continue
+            if line[0] == '#':
+                continue
+            for word in line.split():
+                if self.minLength is not None and len(word) < self.minLength:
+                    continue
+                if self.maxLength is not None and len(word) > self.maxLength:
+                    continue
+                self.words.append(word)
+
+    def pick(self):
+        """Pick a random word from the list, reading it in if necessary"""
+        if self.words is None:
+            self.read()
+        return random.choice(self.words)
+
+
+# Define several shared word lists that are read from disk on demand
+basic_english            = WordList("basic-english")
+basic_english_restricted = WordList("basic-english", minLength=5, maxLength=8)
+characters = WordList("characters")
+defaultWordList = characters
+
+
+### The End ###