apply方法：
import pandas as pd
path = 'score.xlsx'
df = pd.read_excel(path)
df['理综'] = df['物理']+df['化学']+df['生物']
df.head()
def lizong(x):
if x['理综'] > 200:
return '理科好'
elif x['理综'] >100:
return '理科及格'
else:
return '理科差'
df['理科情况'] = df.apply(lizong,axis=1) #axis=1表示参数传递按列索引
df['数学'].value_counts()
df.to_excel("3.xlsx")
标签：理科,lizong,return,df,理综,添加,方法,pandas From： https://www.cnblogs.com/scholarly/p/17001938.html