import datetime
from calendar import monthrange, month_name



def datetime_to_str(datetime_obj, format):
    '''
    :param format:
    %V = Calendar Week
    %d/%m%Y
    :return:
    '''
    if datetime_obj == 'current':
        datetime_obj = datetime.datetime.now()
        return datetime_obj.strftime(format)
    else:
        return datetime_obj.strftime(format)

def get_current_date():
    return datetime.datetime.now()

def get_current_month_number():
    current_date = datetime.datetime.now()
    return int(current_date.strftime("%m"))

def add_days_to_date(datetime_obj,count):
    return datetime_obj + datetime.timedelta(days= count)

def substract_days_to_current_date(count):
    return datetime.datetime.now() - datetime.timedelta(days= count)

def get_count_of_days_for_specific_month(year, month_number):
    '''
    :param year: As Int, ex. 2012
    :param month_number:  As Int, ex. February == 2
    :return:
    '''
    return monthrange(year,month_number)[1] # [0] contains the week day