标签:alt val bsp nbsp term 图片 reset dong jsb
# -*- coding: utf-8 -*- import pandas as pd import sys df1 = pd.DataFrame({ ‘A‘: [‘A0‘, ‘A1‘, ‘A2‘, ‘A3‘], ‘B‘: [‘B0‘, ‘B1‘, ‘B2‘, ‘B3‘], ‘C‘: [‘C0‘, ‘C1‘, ‘C2‘, ‘C3‘], ‘D‘: [‘D0‘, ‘D1‘, ‘D2‘, ‘D3‘]}) df2 = pd.DataFrame({‘A‘: [‘A4‘, ‘A5‘, ‘A6‘, ‘A7‘], ‘B‘: [‘B4‘, ‘B5‘, ‘B6‘, ‘B7‘], ‘C‘: [‘C4‘, ‘C5‘, ‘C6‘, ‘C7‘], ‘D‘: [‘D4‘, ‘D5‘, ‘D6‘, ‘D7‘]}) df3 = pd.DataFrame({‘A‘: [‘A8‘, ‘A9‘, ‘A10‘, ‘A11‘], ‘B‘: [‘B8‘, ‘B9‘, ‘B10‘, ‘B11‘], ‘C‘: [‘C8‘, ‘C9‘, ‘C10‘, ‘C11‘], ‘D‘: [‘D8‘, ‘D9‘, ‘D10‘, ‘D11‘]}) frames = [df1, df2, df3] result = pd.concat(frames)
说明:直接contact之后,index只是重复,而不是变成我们希望的那样,这样在后续的操作中,容易出现逻辑错误。
说明:result[‘val‘] = df4[‘val‘] 是按照index赋值的,所以,结果就出乎我们的意料。
使用result = result.reset_index(drop=True)来改变index就可以了,
转自:https://blog.csdn.net/lujiandong1/article/details/52929090
pandas contact 之后,若要用到index列,要记得用reset_index去处理index
标签:alt val bsp nbsp term 图片 reset dong jsb
原文地址:https://www.cnblogs.com/Allen-rg/p/9694798.html