如何在Calendar模块Python中将默认的第一周工作日数更改为0

Question

I have implemented a logic in my code where I need to calculate the date/day considering Sunday as the starting day of week. When I am using this code

import calendar
day_number = calendar.weekday(2014, 01, 19)

Its returning day_number as 6, but I need it should return as 0, since 19 Jan 2014 is a sunday.

I have also tried to use this:

calendar.setfirstweekday(calendar.SUNDAY)

But still the sunday number remains as 6. Is there any setting using which we can set the sunday number as 0, and the week numbers should appear as below

'sun': 0, 
'mon': 1,
'tue': 2,
'wed': 3,
'thu': 4,
'fri': 5,
'sat': 6,

Answer 1

setfirstweekday affects only display functions like prmonth :

>>> calendar.prmonth(2014, 1)
    January 2014
Mo Tu We Th Fr Sa Su
       1  2  3  4  5
 6  7  8  9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31
>>> calendar.setfirstweekday(calendar.SUNDAY)
>>> calendar.prmonth(2014, 1)
    January 2014
Su Mo Tu We Th Fr Sa
          1  2  3  4
 5  6  7  8  9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 31

How about using modulo?

>>> (calendar.weekday(2014, 1, 19) + 1) % 7
0