3 examples of 'pandas append to dataframe in loop' in Python

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142def append_data(df1, df2):
143 '''
144 Append df2 to df1
145 '''
146 df = pd.concat((df1, df2))
147 return df.groupby(df.index).first()

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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
29def _concat(df, type):
30 if df is None:
31 df = pd.DataFrame(_object_blocks[type])
32 else:
33 _df = pd.DataFrame(_object_blocks[type])
34 df = pd.concat([df, _df], sort=True)
35 return df

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