List of first work days of month for any year

TrustyTony

To be more clear, I post this 'unnecessary optimization' of Vegaseat's code in new thread instead of end of old one. Just to show that this is even simpler than checking if given day is first weekday of the month.

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IT Pro doing Eng-Fin-Eng translations

"""Task: calculate this list (from vegaseat
http://www.daniweb.com/software-development/legacy-and-other-languages/threads/362098/1554079#post1554079)

All first workdays of each month in 2011:
 1) Mo  01/03/2011
 2) Tu  02/01/2011
 3) Tu  03/01/2011
 4) Fr  04/01/2011
 5) Mo  05/02/2011
 6) We  06/01/2011
 7) Fr  07/01/2011
 8) Mo  08/01/2011
 9) Th  09/01/2011
10) Mo  10/03/2011
11) Tu  11/01/2011
12) Th  12/01/2011


"""

from datetime import date, timedelta

def first_workday(month, year):
    first = date(year, month, 1)
    if first.weekday() < 5:
        return first
    return first + timedelta(days=7-first.weekday())

year = 2011
for month in range(1,13):
    print(' %2i) %s' % (month, first_workday(month,year).strftime('%a %m/%d/%Y')))
    
# Produces three letter weekday name instead of two letters
TrustyTony 888 pyMod Team Colleague Featured Poster

Not only way to do it of course (in spite of Python philosophy):

"""Task: calculate the list from vegaseat
http://www.daniweb.com/software-development/legacy-and-other-languages/threads/362098/1554079#post1554079)
"""

from datetime import date, timedelta

def first_workday(month, year):
    first = date(year, month, 1)
    return first if first.weekday() < 5 else first.replace(day=8 - first.weekday())

def table(year = 2011):
    print('\n'.join(' %2i) %s' %
                    (month, first_workday(month,year).strftime('%a %m/%d/%Y'))
                    for month in range(1,13)))
    # Produces three letter weekday name instead of two letters

table()
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