replace(原来内容,更改新内容,inplace=True)
inplace:默认为false意思指不在源数据上修改内容,反之为True意思在源数据集上修改
全表更换
import numpy as np
import pandas as pd
# 创建数据集
df = pd.DataFrame(np.random.randn(6,6),columns=['a','b','c','d','e','f'])
"""
a b c d e f
0 2.049549 -2.822180 0.540615 -0.928022 -0.458822 0.995414
1 1.487181 -0.120874 0.743424 0.508582 0.110145 -0.622661
2 -0.039283 -0.034750 -1.102761 -1.414977 2.411055 -0.172283
3 0.483622 -0.461976 -0.676094 1.392314 -1.272284