如何获取选定月份的日历天数的for循环列表，以不显示过去的月份和天数

import datetime

def get_calendar_days(year, month):
    today = datetime.date.today()
    current_year = today.year
    current_month = today.month

    if year == current_year and month == current_month:
        start_date = today
    else:
        start_date = datetime.date(year, month, 1)

    end_date = datetime.date(year, month, get_last_day(year, month))

    calendar_days = []
    for day in range((end_date - start_date).days + 1):
        date = start_date + datetime.timedelta(days=day)
        if date.month == month:
            calendar_days.append(date.day)

    return calendar_days

def get_last_day(year, month):
    if month == 12:
        next_year = year + 1
        next_month = 1
    else:
        next_year = year
        next_month = month + 1

    last_day = datetime.date(next_year, next_month, 1) - datetime.timedelta(days=1)
    return last_day.day

# 示例用法
selected_year = 2022
selected_month = 12
calendar_days = get_calendar_days(selected_year, selected_month)
print(calendar_days)