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- def helper(x, y):
- print
- print 'compare', x, 'and', y
- print x is y, x is not y
- print x == y, x != y
- print x < y, x <= y
- print x > y, x >= y
- helper(None, None)
- helper(None, True)
- helper(None, False)
- helper(True, True)
- helper(True, False)
- helper(True, None)
- helper(False, False)
- helper(False, True)
- helper(False, None)
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