Initial commit of item_03 examples

Author: craigem

item_03_example_03.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python2.7
+
+'''Item 3, example 3, from Effective Python'''
+
+
+# Example 3
+def to_unicode(unicode_or_str):
+    '''In Python 2, you'll need one method that takes a str or unicode and
+    always returns a unicode .'''
+    if isinstance(unicode_or_str, str):
+        value = unicode_or_str.decode('utf-8')
+    else:
+        value = unicode_or_str
+    return value  # Instance of unicode
+
+print(repr(to_unicode(u'foo')))
+print(repr(to_unicode('foo')))

item_03_example_04.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python2.7
+
+'''Item 3, example 4, from Effective Python'''
+
+
+# Example 4
+def to_str(unicode_or_str):
+    '''You'll need another method that takes str or unicode and always returns
+    a str.'''
+    if isinstance(unicode_or_str, unicode):
+        value = unicode_or_str.encode('utf-8')
+    else:
+        value = unicode_or_str
+    return value  # Instance of str
+
+print(repr(to_str(u'foo')))
+print(repr(to_str('foo')))