题解 | #统计职能部分运动会某项目的报名信息#
统计职能部分运动会某项目的报名信息
https://www.nowcoder.com/practice/607359f8e09f4128bb90bb28a08d42ca
import pandas as pd
items = pd.read_csv('items.csv',sep = ',')
signup = pd.read_csv('signup.csv',sep = ',')
# 表连接之前先筛选条件，优化性能
df1 = items.loc[items.item_name=='javelin']
df2 = signup.loc[signup.department =='functional']
df = pd.merge(df1,df2,on = 'item_id',how='left')
# 筛选
print(df[['employee_id','name','sex']].reset_index(drop = True))
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