_42FlexibleDict.py

class FlexibleDict(dict):
    # kind like changing the method in parent class
    def __getitem__(self, key):
        try:
            if key in self:
                pass    
            elif str(key) in self:
                key = str(key)
            elif int(key) in self:
                key = int(key)
        except ValueError:
            pass

        return dict.__getitem__(self, key)

fd = FlexibleDict()
fd['a'] = 100
print(fd['a'])
fd[5] = 500
print(fd[5])
fd[1] = 100
print(fd['1'])
fd['1'] = 100
print(fd[1])