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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 _init_vocab_from_list(self, vocab_list):
 """Initialize tokens from a list of tokens. It is ok if reserved tokens appear in the vocab list. They will be removed. The set of tokens in vocab_list should be unique. Args: vocab_list: A list of tokens. """

    def token_gen():
      for token in vocab_list:
        if token not in RESERVED_TOKENS:
          yield token

    self._init_vocab(token_gen())