Python|从给定的年份列表中打印闰年的数量

查找闰年的问题非常普遍，我们可能会面临在给定年份列表中查找闰年数量的问题。让我们讨论可以执行此操作的某些方式。

方法#1：使用迭代
检查年份是否是 4 的倍数而不是 100 的倍数或年份是否是 400 的倍数。

Python3

# Python code to finding number of
# leap years in list of years.
 
# Input list initialization
Input = [2001, 2002, 2003, 2004, 2005, 2006,
         2007, 2008, 2009, 2010, 2011, 2012]
 
# Find whether it is leap year or not
def checkYear(year):
    return (((year % 4 == 0) and
             (year % 100 != 0)) or
             (year % 400 == 0))
  
# Answer Initialization
Answer = 0
 
for elem in Input:
    if checkYear(elem):
        Answer = Answer + 1
 
# Printing
print("No of leap years are:", Answer)

输出：

No of leap years are: 3

方法#2：使用日历

Python3

# Python code to finding number of
# leap years in list of years.
 
# Importing calendar
import calendar
 
# Input list initialization
Input = [2001, 2002, 2003, 2004, 2005,
         2006, 2007, 2008, 2009, 2010]
 
# Using calendar to find leap year
def FindLeapYear(Input):
    ans = 0
    for elem in Input:
        if calendar.isleap(int(elem)):
            ans = ans + 1
    return ans
 
Output = FindLeapYear(Input)
 
# Printing
print("No of leap years are:", Output)

输出：

No of leap years are: 2