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)
pandas.DataFrame 根据条件新建列并赋值
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转载自blog.csdn.net/weixin_43064185/article/details/103994136
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