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Support Eiffel-style preconditions and postconditions for functions.
An example for Python metaclasses.
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The dict is modified in place.
If a method ends in _pre or _post, it is removed from the dict
regardless of whether there is a corresponding method.
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�m2t s z Tests._test.<locals>.Test.m2c S s | d k s t � d S)Nr )r )r# r? r r r
�m2_prex s z Tests._test.<locals>.Test.m2_prec S s | | k s t � d S)N)r )r# �resultr? r r r
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