检查日期在两个日期之间

from datetime import datetime

def check_date_between(date_str, start_date_str, end_date_str):
    date_format = "%Y-%m-%d"
    date = datetime.strptime(date_str, date_format)
    start_date = datetime.strptime(start_date_str, date_format)
    end_date = datetime.strptime(end_date_str, date_format)

    if start_date <= date <= end_date:
        return True
    else:
        return False

date_str = "2022-01-01"
start_date_str = "2021-12-01"
end_date_str = "2022-01-31"

result = check_date_between(date_str, start_date_str, end_date_str)
print(result)