使用NumPy计算特定月份的天数

为了计算一个特定月份的天数，我们将使用numpy模块的numpy.datetime64()方法。

示例:

Input: month = 2; year = 2016
Output: 29 days

Input: month = 12; year = 2020
Output: 31 days

让我们假设我们要计算天数的月份是P，下个月是N。我们将从N月份的第一个日期中减去P月份的第一个日期。在numpy.datetime64()方法中实现这一点。

语法:

除12月外的所有月份。

numpy.datetime64('yyyy-N-01') - numpy.datetime64(yyyy-P-01')

For December:

numpy.datetime64('yyyy-P-31') - numpy.datetime64(yyyy-P-01') + 1

下面是各种例子，描述了如何使用numpy模块计算特定月份的天数。

示例 #1:

在这个例子中，我们将找到2016年2月的天数。

# 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))

输出:

29 days

示例 #2:

在这里，我们将找到2001年4月份的天数。

# 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))

输出:

30 days

示例 #3:

在下面的程序中，我们将找出2021年12月份的天数。

# 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))

输出: