pandas.DataFrame 根据条件新建列并赋值的方法

实例如下所示：

import numpy as np
import pandas as pd

data = {'city': ['Beijing', 'Shanghai', 'Guangzhou', 'Shenzhen', 'Hangzhou', 'Chongqing'],
   'year': [2016,2016,2015,2017,2016, 2016],
   'population': [2100, 2300, 1000, 700, 500, 500]}
frame = pd.DataFrame(data, columns = ['year', 'city', 'population', 'debt'])

# 使用apply函数, 如果city字段包含'ing'关键词，则'判断'这一列赋值为1,否则为0
frame['panduan'] = frame.city.apply(lambda x: 1 if 'ing' in x else 0)
print(frame)

来源：https://blog.csdn.net/qq_30565883/article/details/79443090