格式问题 | 牛客网每日正确与错误的答题次数
牛客网每日正确与错误的答题次数
https://www.nowcoder.com/practice/bd74b186d5954eb69c00ee804cebe364
import pandas as pd
df=pd.read_csv('nowcoder.csv')
df['year-month-day']=pd.to_datetime(df['date'],format='%Y-%m-%d').dt.date
# print(df.groupby(['result','year-month-day'])['question_id'].count()) #数值没错，输出格式不对劲
print(df.groupby(['result','year-month-day']).size())
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