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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_user_tag(self,usertag,pass_to_command_line=True):
 """ Set the user tag that is passed to the analysis code. @param user_tag: the user tag to identify the job @bool pass_to_command_line: add user-tag as a variable option. """

    self.__user_tag = usertag
    if pass_to_command_line:
      self.add_var_opt('user-tag', usertag)