@classmethod
def backup(cls, df, name: str='last'):
    """
		To backup the DataFrame or List (or any object with .copy() method)

		Parameters
		----------
		df
			DataFrame or List (or any object with .copy() method)

		name
			Name of the backup. To be used to retrieve the data.

		Returns
		-------
		None
		"""
    cls.backup_repo[name] = df.copy()
