updated contents from Atlas repo

iterables/sentence_gen.py

@@ -0,0 +1,23 @@
+"""
+Sentence: iterate over words using a generator function
+"""
+
+import re
+import reprlib
+
+RE_WORD = re.compile('\w+')
+
+
+class Sentence:
+
+    def __init__(self, text):
+        self.text = text
+
+    def __repr__(self):
+        return 'Sentence(%s)' % reprlib.repr(self.text)
+
+    def __iter__(self):
+        for match in RE_WORD.finditer(self.text):  # <1>
+            yield match.group()  # <2>
+
+# done! <3>