import sys
def check_globals():
for key in globals().keys():
if key in dir(sys.modules["__builtin__"]):
if globals()[key] != getattr(sys.modules["__builtin__"],key):
print "'%s' was overridden in globals()."%key
print "before pylab import"
check_globals()
print
from pylab import *
print "after pylab import"
check_globals()
print