Вопрос StackOverflow

Here is my code to generate a dataframe:

import pandas as pd
import numpy as np

dff = pd.DataFrame(np.random.randn(1, 2), columns=list('AB'))

then I got the dataframe:

          A        B
0  0.626386  1.52325

When I type the command dff.mean(axis=1), I get:

0    1.074821
dtype: float64

According to the reference of pandas, axis=1 stands for columns and I expect the result of the command to be

A    0.626386
B    1.523255
dtype: float64

So what does axis in pandas mean?

What does axis in pandas mean?