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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 _UpdateUserGroups(self, user, groups):
 """Update group membership for a Linux user. Args: user: string, the name of the Linux user account. groups: list, the group names to add the user as a member. Returns: bool, True if user update succeeded. """

    groups = ','.join(groups)
    self.logger.debug('Updating user %s with groups %s.', user, groups)
    command = self.usermod_cmd.format(user=user, groups=groups)
    try:
      subprocess.check_call(command.split(' '))
    except subprocess.CalledProcessError as e:
      self.logger.warning('Could not update user %s. %s.', user, str(e))
      return False
    else:
      self.logger.debug('Updated user account %s.', user)
      return True