case_insensitive_dict.py

case_insensitive_dict.py

class case_insensitive_dict(dict):

    def _lower_keys(self):
        return map(str.lower, self.keys())

    def __getitem__(self, key):
        return self.items()[self._lower_keys().index(key.lower())][1]
        
    def __contains__(self, key):
        return key.lower() in self._lower_keys()

gistfile1.txt

from case_insensitive_dict import case_insensitive_dict

d = case_insensitive_dict(zip('AbCdE', range(5)))
assert d == {'A': 0, 'C': 2, 'b': 1, 'E': 4, 'd': 3}
assert d['a'] == 0
assert d['A'] == 0
assert d['B'] == 1
assert d['c'] == 2
assert d['D'] == 3
assert d['e'] == 4