使用 NumPy
统计特定月份的天数
原文:https://www . geeksforgeeks . org/count-特定月份的天数-使用-numpy/
为了统计特定月份的天数，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
假设我们要计算天数的月份是 P ，下个月是 N. 我们将从该月的第一个日期 N 中减去该月的第一个日期 P 。在 numpy.datetime64() 方法中实现。
语法:
除 12 月以外的所有月份:
numpy.datetime64('yyyy-N-01') - numpy.datetime64(yyyy-P-01')
12 月份:
numpy.datetime64('yyyy-P-31') - numpy.datetime64(yyyy-P-01') + 1
以下是描述如何使用 numpy 模块计算特定月份天数的各种示例:
示例#1:
在本例中，我们将找到 2016 年 2 月的天数。
蟒蛇 3
# 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
例 2:
在这里，我们将找到 2001 年 4 月的天数。
蟒蛇 3
# 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，我们将找到 2021 年 12 月的天数。
蟒蛇 3
# 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:
31 days
