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Alex Rivera
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Given a one-to-one dictionary (=bijection) generated à la for key, value in someGenerator: myDict[key] = value an inverse lookup dictionary can be trivially created by adding invDict[value] = key to the for loop. But is this a Pythonic way? Should I instead write a class Bijection(dict) which manages this inverted dictionary in addition and provides a second lookup function? Or does such a structure (or a similar one) already exist?
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