题解 | #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 sys
import pandas as pd
df = pd.read_csv('nowcoder.csv')
df['year-month-day'] = pd.to_datetime(df['date'])
print(df.groupby(['result','year-month-day'])['user_id'].count())
