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"""
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This file is an example of ....
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"""
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def foo(n):
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    for i in range(n):
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        print i
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    return i
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def f2(v):
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    v[0] = ZZ(0)
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    print v
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m = ZZ(0)
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def f3(x):
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    print x
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    global m
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    m = ZZ(5)
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def add(x, y):
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    """
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    This function (incorrectly!) adds together
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    x and y.
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    """
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    return x + y**ZZ(2)   # this is wrong
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def g():
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    return ZZ(5)/ZZ(4)