PYTHON

number of days in a month python

>>> from datetime import date
>>> (date(2012, 3, 1) - date(2012, 2, 1)).days
29

number of days in a month python

(dt.replace(month = dt.month % 12 +1, day = 1)-timedelta(days=1)).day

number of days in a month python

>>> from calendar import monthrange
>>> monthrange(2011, 2)
(1, 28)

days in month function python

def leap_year(year):
    if year % 400 == 0:
        return True
    if year % 100 == 0:
        return False
    if year % 4 == 0:
        return True
    return False

def days_in_month(month, year):
    if month in {1, 3, 5, 7, 8, 10, 12}:
        return 31
    if month == 2:
        if leap_year(year):
            return 29
        return 28
    return 30

print(days_in_month(2, 2016))  # 29

return days of month python

>>> from calendar import monthrange
>>> monthrange(2012, 2)
(2, 29)
# First number is the weekday of the first day of the month, 
# the second number is the number of days in said month