Python自定义函数计算给定日期是该年第几天的方法示例

#coding=utf-8
#写一个函数，计算给定日期是该年的第几天．
def count(year,month,day):
 count = 0
 #判断该年是平年还是闰年
 if year%400==0 or (year%4==0 and year%100!=0):
  print('%d年是闰年，2月份有29天！'%year)
  li1 = [31,29,31,30,31,30,31,31,30,31,30,31]
  for i in range(month-1):
   count += li1[i]
  return count+day
 else:
  print('%d年是平年，2月份有29天！' % year)
  li2 = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
  for i in range(month-1):
   count +=li2[i]
  return count+day
if __name__ == "__main__":
 year = int(input('请输入年份：'))
 month = int(input('请输入月份：'))
 day = int(input('请输入日期：'))
 count = count(year,month,day)
 print('%d年%d月%d日是今年的第%d天！'%(year,month,day,count))