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Update dataclasses.py
Returns also None when returned string is empty This change is to address issue #68
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@ -30,7 +30,7 @@ class Props:
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return key in self.__data__
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def get(self, key, d=None):
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if key in self.__data__:
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if key in self.__data__ and self.__data__[key] != "":
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return self.__data__[key]
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else:
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return d
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