#!/usr/bin/env python
# coding:utf-8
# 日期生成
# 带上两个日期做为开始和结束日期，会生成从开始到结束的所有日期

import re
import sys
import time
import datetime

date_1_str = sys.argv[1]
date_2_str = sys.argv[2]

date_format = '%Y%m%d' if \
    (re.match(r'^\d{8}$', date_1_str) and re.match(r'^\d{8}$', date_2_str)) else \
        '%Y-%m-%d' if \
            (re.match(r'^\d{4}-\d{1,2}-\d{1,2}$', date_1_str) and re.match(r'^\d{4}-\d{1,2}-\d{1,2}$', date_2_str)) else \
                ''
if date_format:
    date_1 = datetime.datetime.strptime(date_1_str, date_format)
    date_2 = datetime.datetime.strptime(date_2_str, date_format)
    date_1_timestamp, date_2_timestamp = map(int, map(time.mktime, [date_1.timetuple(), date_2.timetuple()]))
    start_date, end_date = [i[1] for i in sorted([(date_1_timestamp, date_1), (date_2_timestamp, date_2)], key=lambda x:x[0])]
    for day in xrange((end_date - start_date).days + 1):
        print((start_date + datetime.timedelta(day)).strftime(date_format))
else:
    print('Date Format: 2019-07-04 or 20190704')