[英]I want to combine two dataframe with the same names columns in pandas
I would like to combine these Dataframe: 我想结合这些数据框:
df_a = pd.DataFrame(data={
'Nombre': [Elisa Perez],
'Fecha': [2/04/2019],
'Sexo': [np.nan],
'Nacionalidad': [np.nan],
'Ciudad': [Roma]})
df_b = pd.DataFrame(data={
'Nombre': [Elisa Perez],
'Fecha': [2/04/2019],
'Sexo': [mujer],
'Nacionalidad': [Italiana],
'Ciudad': [Roma]})
and I want automatically this result without have to write each columns names in the code: 而且我希望自动获得此结果,而不必在代码中写入每个列的名称:
Nombre Fecha Sexo Nacionalidad Ciudad
0 Elisa Perez 2/04/2019 mujer Italiana Roma
Thanks!! 谢谢!!
Use DataFrame.combine_first
with DataFrame.set_index
for columns for matching: 使用DataFrame.combine_first
和DataFrame.set_index
进行匹配的列:
df = (df_b.set_index(['Nombre','Fecha'])
.combine_first(df_a.set_index(['Nombre','Fecha']))
.reset_index())
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