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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def decode_map_element(self, item_type, value):
 """Decode a single element for a map"""

        import urllib
        key = value
        if ":" in value:
            key, value = value.split(':',1)
            key = urllib.unquote(key)
        if Model in item_type.mro():
            value = item_type(id=value)
        else:
            value = self.decode(item_type, value)
        return (key, value)