Python-calculate the date of last week 5

Method 1: fromdatetimeimportdatetime, timedeltaweekdays [Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday] week (dayname, start_dateNone):... Method 1:

Python code

From datetime import datetime, timedelta

Weekdays = ['Monday', 'Tuesday', 'Wednesday', 'Thursday ',

'Friday', 'Saturday', 'Sunday']

Def get_previus_byday (dayname, start_date = None ):

If start_date is None:

Start_date = datetime. today ()

Day_num = start_date.weekday ()

Day_num_target = weekdays. index (dayname)

Days_ago = (7 + day_num-day_num_target) % 7

If days_ago = 0:

Days_ago = 7

Target_date = start_date-timedelta (days = days_ago)

Return target_date

Print (datetime. today ())

Print (get_previus_byday ('Monday '))

Print (get_previus_byday ('Monday', datetime (2016, 8, 28 )))

Method 2: Use the dateutil module

Python code

From datetime import datetime

From dateutil. relativedelta import relativedelta

From dateutil. rrule import *

D = datetime. now ()

Print (d)

Print (d + relativedelta (weekday = FR ))

Print (d + relativedelta (weekday = FR (-1 )))