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def test_and(a,b):
"""
>>> test_and(None, None)
True
>>> test_and(None, 1)
False
>>> test_and(1, None)
False
"""
return a is None and b is None
def test_more(a,b):
"""
>>> test_more(None, None)
True
>>> test_more(None, 1)
True
>>> test_more(1, None)
False
>>> test_more(None, 0)
False
"""
return a is None and (b is None or b == 1)
def test_more_c(a,b):
"""
>>> test_more_c(None, None)
True
>>> test_more_c(None, 1)
True
>>> test_more_c(1, None)
False
>>> test_more_c(None, 0)
False
"""
return (a is None or 1 == 2) and (b is None or b == 1)
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