将两个 Pandas 数据框与一个公共列合并

Question

I have two dataframes that look something like this:

50       51           100            The Treasure of the Sierra Madre (1948)
51       52            98                                          Up (2009)
52       53           100             12 Angry Men (Twelve Angry Men) (1957)
53       54           100      The 400 Blows (Les Quatre cents coups) (1959)

                                    title viewers_score number_of_viewers_ratings
0  12 Angry Men (Twelve Angry Men) (1957)            97                    103672
1                     The 39 Steps (1935)            86                     23647
2     The Adventures of Robin Hood (1938)            89                     33584
3                    All About Eve (1950)            94                     44564
4   All Quiet on the Western Front (1930)            89                     17768

dataframes head from terminal

and I want to join them, I tried pandas 'merge':

df_merge = pd.merge(df,df_,on='title)

but it doesn't work because the title columns in the dataframes aren't in the same order, so when I tried it, I get a false in all rows and so an empty dataframe. how can I merge the two of them based on the common 'title' column?

Answer 1

合并数据帧如下所示：

df_merge = df.merge(df_, on='title')

Answer 2

left_table.merge(right_table, on='title')

thats it. If you had an error, you didn't give much information to look at it.