Script de détermination des troisièmes mercredis du mois

Ce script écrit en Python, permet de déterminer le 3^e mercredi d'un mois.

Version originale par Benoit

#! /usr/bin/env python
# -*- coding: iso-8859-1 -*-
## LICENSE
"""
A command-line utility to find the third Wednesday of a month
"""

import getopt, math,re

def usage(prg_name):
  """Usage: %(prg_name)s [options] [date]

returns the date of third wednesday of any month, 255 if something
went wrong, or 0 if no date has to be returned

-v --verbose       verbose. Increases verbosity if set more than once
-h --help          this help

date should be given as [[d]d/][m]m/y... where / can be replace at your
convenience with - or .

years before BC are not allowed"""
  print usage.__doc__%{'prg_name':prg_name}

def gregorian_to_julian(year, month, day):
    a = (14-month)/12
    y = year+4800-a
    m = month + 12*a - 3
    return day + (153*m+2)/5 + y*365 + y/4 - y/100 + y/400 - 32045

def day(date):
    return int(gregorian_to_julian(date['year'],
                               date['month'],
                               date['day'])+1)  % 7

def main(args):
    Weekdays = ["Sunday", "Monday", "Tuesday", "Wednesday",
                "Thursday", "Friday", "Saturday"]
    me=args[0]
    if len(args)<2:
        usage(me)
        return 255
    try:
        options, args = getopt.getopt(args[1:],
                                      'hv',
                                      ["help", "verbose"])
    except:
        usage(me); return 255
    verbose=0
    for k, v in options:
        if k in ('-h', '--help'): usage(me); return 0
        if k in ('-v', '--verbose'):
            verbose+=1

    # Parse date arg
    splitDate={'sep':"[\./-]"}
    validateDate="^([0-9]{1,2}%(sep)s)?[0-9]{1,2}%(sep)s[0-9]+$"%splitDate
    if len(args)<1 or not re.match(validateDate,args[0]):
        # At this point, we need a valid date
        usage(me); return 255

    # Get day, month, year
    tag=re.compile(splitDate['sep'])
    inputDate=tag.split(args[0])

    date={'day':1}
    if len(inputDate)>2:
        date['day']=int(inputDate[0])
    date['month']=int(inputDate[-2])
    date['year']=int(inputDate[-1])

    if not 0<date['month']<13:
        usage(me); return 255

    # Now, we can make Julian day
    jd = day(date)

    if (verbose==2):
        print ("%(day)i/%(month)i/%(year)i si a "%date)+Weekdays[jd]

    date['day']=1
    fdom = day(date)

    if (verbose==2):
        print "The first day of the month is a: "+Weekdays[fdom]

    if (fdom <= 3):
        #first wednesday goes on the first week
        date= (3-fdom)+2*7
        if (verbose):
            print "The third Wednesday is the "+str(date+1)+" this month"
    else:
        #first wednesday goes on the second week
        date= (3-fdom)+3*7
        if (verbose):
            print "The third Wednesday is the "+str(date+1)+" this month"

if __name__ == '__main__':
  import sys
  sys.exit(main(sys.argv))

Version modifiée par NicolasGrandjean

Modifiée pour permettre de retourner seulement le jour du mois indiqué (sous la forme MM/AAAA).

#! /usr/bin/env python
# -*- coding: iso-8859-1 -*-
## LICENSE
"""
A command-line utility to find the third Wednesday of a month
"""

import getopt, math,re

def usage(prg_name):
  """Usage: %(prg_name)s [options] [date]

returns the date of third wednesday of any month, 255 if something
went wrong, or 0 if no date has to be returned

-v --verbose       verbose. Increases verbosity if set more than once
-h --help          this help

date should be given as [[d]d/][m]m/y... where / can be replace at your
convenience with - or .

years before BC are not allowed"""
  print usage.__doc__%{'prg_name':prg_name}

def gregorian_to_julian(year, month, day):
    a = (14-month)/12
    y = year+4800-a
    m = month + 12*a - 3
    return day + (153*m+2)/5 + y*365 + y/4 - y/100 + y/400 - 32045

def day(date):
    return int(gregorian_to_julian(date['year'],
                               date['month'],
                               date['day'])+1)  % 7
def main(args):
    Weekdays = ["Sunday", "Monday", "Tuesday", "Wednesday",
                "Thursday", "Friday", "Saturday"]
    me=args[0]
    if len(args)<2:
        usage(me)
        return 255
    try:
        options, args = getopt.getopt(args[1:],
                                      'hv',
                                      ["help", "verbose"])
    except:
        usage(me); return 255
    verbose=0
    for k, v in options:
        if k in ('-h', '--help'): usage(me); return 0
        if k in ('-v', '--verbose'):
            verbose+=1

    # Parse date arg
    splitDate={'sep':"[\./-]"}
    validateDate="^([0-9]{1,2}%(sep)s)?[0-9]{1,2}%(sep)s[0-9]+$"%splitDate
    if len(args)<1 or not re.match(validateDate,args[0]):
        # At this point, we need a valid date
        usage(me); return 255

    # Get day, month, year
    tag=re.compile(splitDate['sep'])
    inputDate=tag.split(args[0])

    date={'day':1}
    if len(inputDate)>2:
        date['day']=int(inputDate[0])
    date['month']=int(inputDate[-2])
    date['year']=int(inputDate[-1])

    if not 0<date['month']<13:
        usage(me); return 255

    # Now, we can make Julian day
    jd = day(date)
    if (verbose==2):
        print ("%(day)i/%(month)i/%(year)i si a "%date)+Weekdays[jd]

    date['day']=1
    fdom = day(date)

    if (verbose==2):
        print ""+Weekdays[fdom]

    if (fdom <= 3):
        #first wednesday goes on the first week
        date= (3-fdom)+2*7
        if (verbose):
            print ""+str(date+1)+""
    else:
        #first wednesday goes on the second week
        date= (3-fdom)+3*7
        if (verbose):
            print ""+str(date+1)+""

if __name__ == '__main__':
  import sys
  sys.exit(main(sys.argv))