如何在python中按升序将缺失的日期从NAT替换为某个日期

import datetime

start_date = datetime.date(2022, 1, 1)
end_date = datetime.date(2022, 1, 31)

date_list = [start_date + datetime.timedelta(days=x) for x in range((end_date - start_date).days + 1)]

missing_dates = []

for date in date_list:
    if date == datetime.date.min:
        missing_dates.append(date)

replacement_date = datetime.date(2022, 1, 15)

for missing_date in missing_dates:
    missing_date = replacement_date