如果值/字符串按日期在python中重复出现，则计数

from datetime import datetime

values = ['2022-01-01', '2022-01-02', '2022-01-01', '2022-01-03', '2022-01-02']

count_dict = {}

for value in values:
    date = datetime.strptime(value, '%Y-%m-%d').date()
    if date in count_dict:
        count_dict[date] += 1
    else:
        count_dict[date] = 1

for date, count in count_dict.items():
    print(f'{date}: {count}次')

2022-01-01: 2次
2022-01-02: 2次
2022-01-03: 1次