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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_all_file_column_labels(self, xlabel=None, ylabel=None):
 """Indicate general x,y column labels. This sets the general x and y column labels into data files for all plots. It can be overridden for specific plots. Args: xlabel/ylabel (str, optional):
 String indicating column label for x,y values into the data files. Default is None. Raises: UserWarning: If xlabel and ylabel are both not specified, The user will be alerted, but the code will not stop. """

        if xlabel is not None:
            self.general.x_column_label = xlabel
        if ylabel is not None:
            self.general.y_column_label = ylabel
        if xlabel is None and ylabel is None:
            warnings.warn("is not specifying x or y lables even"
                          + "though column labels function is called.", UserWarning)
        return