Desafió 2014 - Semana 2

[sukoy]

Bueno, hecho de dos formas:

Código Python:

from datetime import date
 
def weekdays(from_date, to_date):
    correccion = 0
    diferencia = (to_date - from_date).days + 1
    dia_inicio = date.weekday(from_date)
    diferencia_corregida = diferencia + dia_inicio
    if dia_inicio == 6 :
        correccion += -1
    if diferencia_corregida % 7 == 6:
        correccion += 1
 
    return diferencia_corregida / 7 * 2 + correccion
 
if __name__ == '__main__':
    from time import time
    t1 = time()
    assert weekdays(date(2013, 9, 18), date(2013, 9, 23)) == 2, "Error en test 1"
    assert weekdays(date(2013, 1, 1), date(2013, 2, 1)) == 8, "Error en test 2"
    assert weekdays(date(2013, 2, 2), date(2013, 2, 3)) == 2, "Error en test 3"
    assert weekdays(date(1999, 1, 1), date(2000, 1, 1)) == 105, "Error en test 4"
    assert weekdays(date(2004, 2, 1), date(2004, 2, 29)) == 9, "Error en test 5"
    assert weekdays(date(1980, 8, 8), date(2012, 3, 3)) == 3295, "Error en test 6"
    assert weekdays(date(2001, 2, 2), date(2007, 12, 31)) == 722, "Error en test 7"
    assert weekdays(date(2002, 9, 9), date(2002, 9, 10)) == 0, "Error en test 8"
    assert weekdays(date(2011, 1, 1), date(2012, 2, 1)) == 114, "Error en test 9"
    assert weekdays(date(1995, 3, 2), date(1999, 2, 3)) == 410, "Error en test 10"
    assert weekdays(date(1992, 2, 1), date(2000, 1, 1)) == 827, "Error en test 11"
    assert weekdays(date(1998, 5, 1), date(2001, 2, 22)) == 294, "Error en test 12"
    assert weekdays(date(2003, 8, 2), date(2005, 3, 3)) == 166, "Error en test 13"
    assert weekdays(date(2010, 2, 5), date(2010, 12, 31)) == 94, "Error en test 14"
    t2 = time()
 
    print("Tiempo de ejecucion %0.3fs" % (t2 - t1))
    print("Todos los tests completados")
 

Y.

Código Python:

from datetime import date, timedelta
 
def weekdays(from_date, to_date):
 
    diferencia = (to_date - from_date).days +1
    count = 0
    for i in xrange(diferencia):
        if date.weekday(from_date) > 4:
            count +=  1
        from_date += timedelta(days=1)
    return count
 
if __name__ == '__main__':
    from time import time
    t1 = time()
    assert weekdays(date(2013, 9, 18), date(2013, 9, 23)) == 2, "Error en test 1"
    assert weekdays(date(2013, 1, 1), date(2013, 2, 1)) == 8, "Error en test 2"
    assert weekdays(date(2013, 2, 2), date(2013, 2, 3)) == 2, "Error en test 3"
    assert weekdays(date(1999, 1, 1), date(2000, 1, 1)) == 105, "Error en test 4"
    assert weekdays(date(2004, 2, 1), date(2004, 2, 29)) == 9, "Error en test 5"
    assert weekdays(date(1980, 8, 8), date(2012, 3, 3)) == 3295, "Error en test 6"
    assert weekdays(date(2001, 2, 2), date(2007, 12, 31)) == 722, "Error en test 7"
    assert weekdays(date(2002, 9, 9), date(2002, 9, 10)) == 0, "Error en test 8"
    assert weekdays(date(2011, 1, 1), date(2012, 2, 1)) == 114, "Error en test 9"
    assert weekdays(date(1995, 3, 2), date(1999, 2, 3)) == 410, "Error en test 10"
    assert weekdays(date(1992, 2, 1), date(2000, 1, 1)) == 827, "Error en test 11"
    assert weekdays(date(1998, 5, 1), date(2001, 2, 22)) == 294, "Error en test 12"
    assert weekdays(date(2003, 8, 2), date(2005, 3, 3)) == 166, "Error en test 13"
    assert weekdays(date(2010, 2, 5), date(2010, 12, 31)) == 94, "Error en test 14"
    t2 = time()
 
    print("Tiempo de ejecucion %0.3fs" % (t2 - t1))
    print("Todos los tests completados")
 

La primera es más rápida, la segunda la encuentro mas lógica.

Saludos.