如何在Pandas数据框中连接多个文本列

Question

How can i merge/join multiple text columns within a single pandas dataframe without concatenating the columns individually

eg

d = pd.DataFrame({'A':['one','two','three'],'B':['London','New York','Tokyo'],'C':['UK','USA','Japan'],'D':['Hot','Hot','Cold']})

the output should be

0         one London UK Hot
1      two New York USA Hot
2    three Tokyo Japan Cold
Name: combined, dtype: object

Answer 1

Use DataFrame.apply along axis=1 with join :

d.apply(' '.join, axis=1)

0         one London UK Hot
1      two New York USA Hot
2    three Tokyo Japan Cold
dtype: object