农历(阴历)/公历(阳历) 转换

lunar.py

#!/usr/bin/env python3.9
import sxtwl
import argparse
import datetime as dt

DATE_FORMAT = "%Y-%m-%d"
parser = argparse.ArgumentParser(description='convert between lunar and solar calendar')
parser.add_argument('date', metavar='date', type=str, nargs='?', default=dt.datetime.today().strftime(DATE_FORMAT),
                    help='date to convert')
parser.add_argument('-s', dest='is_solar', action='store_const',
                    const=True, default=False,
                    help='input date is solar')

args = parser.parse_args()

date=dt.datetime.strptime(args.date,DATE_FORMAT)

if args.is_solar:
  day = sxtwl.fromSolar(date.year, date.month, date.day)
  s = "农历:%d年%s%d月%d日" % (day.getLunarYear(), '闰' if day.isLunarLeap() else '', day.getLunarMonth(), day.getLunarDay())
  if day.hasJieQi():
    s += f"({day.getJieQi()})"
else:
  day = sxtwl.fromLunar(date.year, date.month, date.day)
  s = "solar: %d-%02d-%d" % (day.getSolarYear(), day.getSolarMonth(), day.getSolarDay())

print(s)

用法:
日期格式是 yyyy-mm-dd.
-s 表示输入日期是公历日期, 输出会是农历日期. 如果没有 -s, 输入就是农历日期, 输出就是公历.
lunar -s 2022-01-10
lunar 2022-01-10