append one column pandas dataframe

df1 = df1.join(df2[column])

Here is what the above code is Doing:
1. We’re creating a new DataFrame called df1.
2. We’re adding the column ‘A’ from df2 to df1.
3. We’re adding the column ‘B’ from df2 to df1.
4. We’re adding the column ‘C’ from df2 to df1.
5. We’re adding the column ‘D’ from df2 to df1.