Apply the second version of SF patch http://www.python.org/sf/536241
Add a method zfill to str, unicode and UserString and change
Lib/string.py accordingly.
This activates the zfill version in unicodeobject.c that was
commented out and implements the same in stringobject.c. It also
adds the test for unicode support in Lib/string.py back in and
uses repr() instead() of str() (as it was before Lib/string.py 1.62)
diff --git a/Lib/test/string_tests.py b/Lib/test/string_tests.py
index 5c8dd93..ea25983 100644
--- a/Lib/test/string_tests.py
+++ b/Lib/test/string_tests.py
@@ -227,6 +227,16 @@
test('endswith', 'ab', 0, 'ab', 0, 1)
test('endswith', 'ab', 0, 'ab', 0, 0)
+ test('zfill', '123', '123', 2)
+ test('zfill', '123', '123', 3)
+ test('zfill', '123', '0123', 4)
+ test('zfill', '+123', '+123', 3)
+ test('zfill', '+123', '+123', 4)
+ test('zfill', '+123', '+0123', 5)
+ test('zfill', '-123', '-123', 3)
+ test('zfill', '-123', '-123', 4)
+ test('zfill', '-123', '-0123', 5)
+ test('zfill', '', '000', 3)
test('zfill', '34', '34', 1)
test('zfill', '34', '0034', 4)