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    >>> v.satisfied_by('0.2')
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    If any version numbers passed in do not conform to the
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    >>> v = VersionPredicate('p1.p2.p3.p4(>=1.0, <=1.3a1, !=1.2zb3)')
    Traceback (most recent call last):
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    ValueError: invalid version number '1.2zb3'

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