📅  最后修改于: 2022-03-11 14:45:20.943000             🧑  作者: Mango
import pandas as pd
import numpy as np
df = pd.DataFrame(np.array([[1, 2, 3, 5], [4, 5, 6, 7], [7, 8, 9, 1]]),
columns=['a', 'b', 'c', 'd'])