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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 set(self, safe_len=False, **kwds):
        '''Set one or more attributes.
        '''
        if kwds:  # double check
            d = self.kwds()
            d.update(kwds)
            self.reset(**d)
        if safe_len and self.item:
            self.leng = _len