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Calling Tkinter.Tk() with baseName keyword argument throws UnboundLocalError on Python 2.7.4.
A process to reproduce the bug:
>>> import Tkinter
>>> Tkinter.Tk(baseName="test")
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1748, in __init__
 if not sys.flags.ignore_environment:
UnboundLocalError: local variable 'sys' referenced before assignment
A patch to fix the bug:
--- Lib/lib-tk/Tkinter.py.orig
+++ Lib/lib-tk/Tkinter.py
@@ -1736,7 +1736,7 @@
 # ensure that self.tk is always _something_.
 self.tk = None
 if baseName is None:
- import sys, os
+ import os
 baseName = os.path.basename(sys.argv[0])
 baseName, ext = os.path.splitext(baseName)
 if ext not in ('.py', '.pyc', '.pyo'):