Method setdefault

Lib/collections/__init__.py:269–277

Insert key with a value of default if key is not in the dictionary. Return the value for key if key is in the dictionary, else default.

(self, key, default=None)

        return default

    def setdefault(self, key, default=None):
        '''Insert key with a value of default if key is not in the dictionary.

        Return the value for key if key is in the dictionary, else default.
        '''
        if key in self:
            return self[key]
        self[key] = default
        return default

    @_recursive_repr()
    def __repr__(self):