题解 | #统计运动会项目报名人数(二)#
统计运动会项目报名人数(二)
https://www.nowcoder.com/practice/737d224c9cce482fb56ff812d04e79ab
import pandas as pd
df1 = pd.read_csv('items.csv')
df2 = pd.read_csv('signup.csv')
df = pd.merge(df1,df2,on='item_id')
a = df.groupby(['item_name']).count()['employee_id']
print(a)
