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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 trim(self, len_):
 """Return a copy of the version, possibly with less tokens. Args: len_ (int):
 New version length. If >= current length, an unchanged copy of the version is returned. """

        other = Version(None)
        other.tokens = self.tokens[:len_]
        other.seps = self.seps[:len_ - 1]
        return other