如何在python中更改两个DataFrame列中的值

pip install pandas

import pandas as pd

df1 = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]})
df2 = pd.DataFrame({'C': [7, 8, 9], 'D': [10, 11, 12]})

df1['A'] = df2['C']

df1[['A', 'B']] = df2[['C', 'D']]

import pandas as pd

df1 = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]})
df2 = pd.DataFrame({'C': [7, 8, 9], 'D': [10, 11, 12]})

df1['A'] = df2['C']
df1[['A', 'B']] = df2[['C', 'D']]

print(df1)

   A   B
0  7  10
1  8  11
2  9  12