fork download
copy 
  1. from datetime import date
  2. from calendar import monthrange
  3.  
  4.  
  5. def date_a_month_ago(today):
  6.     x = today.month - 1
  7.     previous_month = 12 if x == 0 else x
  8.     year = today.year - 1 if x == 0 else today.year
  9.     last_day_of_previous_month = monthrange(year, previous_month)[1]
  10.     day = last_day_of_previous_month if today.day > last_day_of_previous_month else today.day
  11.     return date(year, previous_month, day)
  12.  
  13.  
  14. # Tests
  15. print(date_a_month_ago(date(2021, 11, 1)))
  16. print(date_a_month_ago(date(2021, 1, 31)))
  17. print(date_a_month_ago(date(2021, 12, 31)))
  18. print(date_a_month_ago(date(2021, 3, 29)))
  19. print(date_a_month_ago(date(2020, 3, 29)))
  20. print(date_a_month_ago(date(2021, 3, 30)))
  21. print(date_a_month_ago(date(2020, 3, 30)))
  22.  
Success #stdin #stdout 0.01s 7996KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
2021-10-01
2020-12-31
2021-11-30
2021-02-28
2020-02-29
2021-02-28
2020-02-29
https://ideone.com/e0tfR8
language:
Python (cpython 2.7.16)
created:
4 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!