How to use 'pandas joins' in Python

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557def pandas_outer_join(self, df_list):
558 if df_list is None: return None
560 # remove any None elements (which can't be joined!)
561 df_list = [i for i in df_list if i is not None]
563 if len(df_list) == 0: return None
564 elif len(df_list) == 1: return df_list[0]
566 # df_list = [dd.from_pandas(df) for df in df_list]
568 df_list = df_list[0].join(df_list[1:], how="outer")
570 return df_list

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