Python Calendar module use demo (also uses clint, argparse)

cal.py

#!/usr/bin/python

""" Example use of the calendar module
http://docs.python.org/dev/library/calendar.html

Uses clint for p(r)etty coloring
https://github.com/kennethreitz/clint. 
Will silently ignore if not installed
and so no colors for you.

TODO:
----

Bad input checking
Better CLI
More stuff?

"""

import argparse
import sys

from calendar import day_name
from calendar import weekday
from calendar import TextCalendar

from clint.textui import colored


def getday(year, month, day):
    """ Get the weekday for a given YYYY-MM-DD """

    return day_name[weekday(year, month, day)]

def getyear(year):
    """ Get a year's worth of days """

    mycal = TextCalendar()
    return mycal.formatyear(year)

def getmonth(year, month):
    """ Get a year/month's worth of days"""

    mycal = TextCalendar()
    return mycal.formatmonth(year, month)


def myprint(args):
    """ color my print """
    # Recipe: http://stackoverflow.com/a/4527622/59634
    try:
        __import__('clint')
        print(colored.green(args))    
    except ImportError:
        print(args)

if __name__=='__main__':

    parser = argparse.ArgumentParser(prog='cal.py',description='A simple calendar utility')
    date = parser.add_argument_group('date','DD MM YYYY')
    date.add_argument('integers', metavar='date', type=int, nargs='+',
                   help='DD MM YYYY prints the weekday on this date, \
                        MM YY prints the month\'s calendar and \
                        DD MM YY prints the year\'s calendar')

    args = parser.parse_args()
    args = args.integers

    if len(args) == 0 or len(args) > 3:
        parser.print_usage()

    if len(args) == 1:
        year = args[0]
        myprint(getyear(int(year)))
        
    if len(args) == 2:
        month, year = args[0:]
        myprint(getmonth(int(year), int(month)))

    if len(args) == 3 :
        day, month, year = args[0:]
        myprint('{0:d}-{1:d}-{2:d} :: {3:s}'.format(day,month,year,getday(year, month, day)))