import pandas as pd
from numpy import timedelta64
a = pd.read_csv('nowcoder.csv', sep=',')
a['year-month-day'] = a['date'].astype('datetime64[D]')
b = a[a['year-month-day'].between('2021-12-01','2021-12-31')].groupby(['result','year-month-day']).size()
print(b)