DataFrame某些列值替换的三种方式

DataFrame某些列值替换的三种方式

通过自定义函数，对DataFrame数据的几列值进行替换。

import numpy as np
import pandas as pd

data = pd.read_csv(r'C:\Users\Administrator\Desktop\ASC_Model\service_loan.csv', encoding='gbk')

方法一

def dataprocess(data):
    for columns in('EMAILADD','QQNO','WECHAT'):
        data[columns] = data[columns].isnull().map({True:0,False:1})
    return data

方法二

def dataprocess(data):
    for col in ('EMAILADD','QQNO','WECHAT'):
        data[col]=data[col].isnull()
        data[col]=data[col].map({True:0,False:1})
    return data

方法三

def dataprocess(data):
    for col in ('EMAILADD','QQNO','WECHAT'):
        data[col] = np.where(data[col].isnull(),0,1)
    return data

data = dataprocess(data)

print(data[['EMAILADD','QQNO','WECHAT']].head(10))