python - 如何找到数据帧行的平均值？

Question

df:

 A B  C D
 1 2  3 la
 0 1 -1 na

如何找到这样的每一行的平均值？:

 A B  C  D  mean
 1 2  3  la    2
 0 1 -1  na    0

我尝试过，但情况并非如此(:

 some_col = [A,B,C]
 for col in some_col:
    df['mean'] = [np.mean([x, y]) for x, y in zip(df[col], df['mean'])]

Answer 1

你应该尝试这个:

df.mean(axis=1)