In order to count the number of days of a specific month, we will be using numpy.datetime64() method of numpy module.
Examples:
Input: month = 2; year = 2016 Output: 29 days Input: month = 12; year = 2020 Output: 31 days
Let us assume the month whose number of days we want to count be P and the next month is N. We will subtract the first date of the month P from the first date of the month N. Implementing this in numpy.datetime64() method.
Syntax:
For all months except December:
numpy.datetime64('yyyy-N-01') - numpy.datetime64(yyyy-P-01')
For December:
numpy.datetime64('yyyy-P-31') - numpy.datetime64(yyyy-P-01') + 1
Below are various examples which depict how to count the number of days of a specific month using numpy module:
Example #1:
In this example, we will find the number of days in the month of February of the year 2016.
Python3
# import module import numpy # explicit function to calculate # number of days def calcDays(month, year): date = 0 # December case if month == 12: end = str(year)+'-'+str(month)+'-31' begin = str(year)+'-'+str(month)+'-01' date = 1 else: # single digit months if month < 10: endM = '-0'+str(month+1) beginM = '-0'+str(month) # double digit months else: endM = '-'+str(month+1) beginM = '-'+str(month) end = str(year)+endM+'-01' begin = str(year)+beginM+'-01' # return number of days return (numpy.datetime64(end) - numpy.datetime64(begin)+date) # Driver Code # get month month = 2 # get year year = 2016 # call the function print(calcDays(month, year)) |
Output:
29 days
Example #2:
Here, we will find the number of days in the month of April of the year 2001.
Python3
# import module import numpy # explicit function to calculate # number of days def calcDays(month, year): date = 0 # December case if month == 12: end = str(year)+'-'+str(month)+'-31' begin = str(year)+'-'+str(month)+'-01' date = 1 else: # single digit months if month < 10: endM = '-0'+str(month+1) beginM = '-0'+str(month) # double digit months else: endM = '-'+str(month+1) beginM = '-'+str(month) end = str(year)+endM+'-01' begin = str(year)+beginM+'-01' # return number of days return (numpy.datetime64(end) - numpy.datetime64(begin)+date) # Driver Code # get month month = 4 # get year year = 2001 # call the function print(calcDays(month, year)) |
Output:
30 days
Example #3:
In the below program, we will find the number of days in the month of December of the year 2021.
Python3
# import module import numpy # explicit function to calculate # number of days def calcDays(month, year): date = 0 # December case if month == 12: end = str(year)+'-'+str(month)+'-31' begin = str(year)+'-'+str(month)+'-01' date = 1 else: # single digit months if month < 10: endM = '-0'+str(month+1) beginM = '-0'+str(month) # double digit months else: endM = '-'+str(month+1) beginM = '-'+str(month) end = str(year)+endM+'-01' begin = str(year)+beginM+'-01' # return number of days return (numpy.datetime64(end) - numpy.datetime64(begin)+date) # Driver Code # get month month = 12 # get year year = 2021 # call the function print(calcDays(month, year)) |
Output:
31 days
