程式碼示例：

#!/usr/bin/env python

# -*- coding:utf-8 -*-

import datetime

import collections

def date_list_fun(starttime,endtime):

"""計算輸入的起始日期和結束日期之間的所有日期"""

_u=datetime.timedelta(days=1)

startdate=datetime.datetime.strptime(starttime,"%Y%m%d")

enddate=datetime.datetime.strptime(endtime,"%Y%m%d")

n=0

date_list=[]

if startdate<=enddate:

# print startdate,enddate

while 1:

_time=startdate+n*_u

date_list.append(_time.strftime("%Y%m%d"))

n=n+1

if _time==enddate:

break

return date_list

def allweeks(year):

"""計算一年內所有周的具體日期,從1月1號開始，12.31號結束

輸出如{1: ["20190101","20190106"],...} 只有六天

"""

start_date=datetime.datetime.strptime(str(year)+"0101","%Y%m%d")

end_date=datetime.datetime.strptime(str(year)+"1231","%Y%m%d")

_u=datetime.timedelta(days=1)

n=0

week_date={}

while 1:

_time=start_date+n*_u

w=str(int(_time.strftime("%W"))+1)

week_date.setdefault(w,[]).append(_time.strftime("%Y%m%d"))

n=n+1

if _time==end_date:

break

week_date_start_end={}

for i in week_date:

week_date_start_end[i]=[week_date[i][0],week_date[i][-1]]

print week_date

print week_date_start_end

return week_date

def all_weeks(year):

"""計算一年內所有周的具體日期,每週都是7天，可能最後一週到 下年

week_date 輸出如{1: ["20181231", "20190101", "20190102", "20190103", "20190104", "20190105", "20190106"],...}

計算一年內所有周的起始日期

week_date_start_end {1: ["20181231","20190106"],...}

"""

start_date=datetime.datetime.strptime(str(int(year)-1)+"1224","%Y%m%d")

end_date=datetime.datetime.strptime(str(int(year)+1)+"0107","%Y%m%d")

_u=datetime.timedelta(days=1)

n=0

week_date={}

while 1:

_time=start_date+n*_u

y,w=_time.isocalendar()[:2]

if y==year :

week_date.setdefault(w,[]).append(_time.strftime("%Y%m%d"))

n=n+1

if _time==end_date:

break

week_date_start_end={}

for i in week_date:

week_date_start_end[i]=[week_date[i][0],week_date[i][-1]]

print week_date

# print week_date_start_end

return week_date,week_date_start_end