pgcollections.py 文件源码

def __init__(self, *args):
        OrderedDict.__init__(self, {}) ## requirement for the empty {} here seems to be a python bug?
        self.keyMap = OrderedDict([(k.lower(), k) for k in OrderedDict.keys(self)])
        if len(args) == 0:
            return
        elif len(args) == 1 and isinstance(args[0], dict):
            for k in args[0]:
                self[k] = args[0][k]
        else:
            raise Exception("CaselessDict may only be instantiated with a single dict.")

    #def keys(self):
        #return self.keyMap.values()