從本月起算 過去 12 個月月份 python

爬**時有段資料需要生成過去12個月月份起始時間,拼接url. 需求如下

[

'2019-7-1|2019-7-31'
,'2019-6-1|2019-6-30'
,'2019-5-1|2019-5-31'
,'2019-4-1|2019-4-30'
,'2019-3-1|2019-3-31'
,'2019-2-1|2019-2-28'
,'2019-1-1|2019-1-31'
,'2018-12-1|2018-12-31'
,'2018-11-1|2018-11-30'
,'2018-10-1|2018-10-31'
,'2018-9-1|2018-9-30'
,'2018-8-1|2018-8-31'
]

import calendar

from datetime import datetime, timedelta
def make_last_12_month()
:"""
生成過去12個月的時間字串列表
['2019-6-1|2019-6-30'
,'2019-5-1|2019-5-31'
,'2019-4-1|2019-4-30'
...]
"""   days = datetime.
now(
).day
last_month = datetime.
now()-
timedelta
(days=days)
time_li =
for i in
range(12
):d = calendar.
monthrange
(last_month.year, last_month.month)
tm =
'{}-{}-{}|{}-{}-{}'
.format
(last_month.year, last_month.month,
1, last_month.year, last_month.month, d[1]
)       last_month = last_month -
timedelta
(days=d[1]
)       time_li.
(tm)
print
(time_li)
return time_li

def make_last_90_day()

:"""
生成過去 90 天日期列表      [
'2019-07-22|2019-07-22'
,'2019-07-21|2019-07-21'
...]
"""    days=
for day in
range(1
,91):
get_time = datetime.
now()-
timedelta
(days=day)
get_time = get_time.
strftime
('%y-%m-%d'
)        get_time = f'|'
days.
(get_time)
return days