计算给定年份范围内特定工作日的日期的Python程序

给定一个日期，我们的任务是获取工作日索引和年份范围，计算该日期在年份范围内特定工作日的总出现次数。

例子：

Input : date = 13, weekdy = 5, strt, end = 1950, 2020

Output : 120

Explanation : Total dates with Friday 13 from 1950 – 2020 is 120.

Input : date = 13, weekdy = 1, strt, end = 1950, 2050

Output : 173

Explanation : Total dates with Monday, 13 from 1950 – 2050 is 173.

方法 1：使用循环+ 工作日（）

在这里，我们运行一个从开始年到结束年的嵌套循环，并且在每一年中，每个月都根据需要检查一个日期以精确到工作日，如果找到，则计数器递增。

Python3

# Python3 code to demonstrate working of
# Count date on weekday in Year Range
# Using loop + weekday()
from datetime import datetime
  
# initializing date
date = 13
  
# initializing weekday
weekdy = 5
  
# initializing range of Years
strt, end = 1950, 2020
  
# printing Number
print("The date, weekday : " + str(date) + " " + str(weekdy))
  
res = 0
for year in range(strt, end + 1):
  
    # checking each month for same date
    # weekday combination
    for month in range(1, 13):
        if datetime(year, month, date).weekday() == weekdy:
            res += 1
  
# printing result
print("Total dates with same weekday : " + str(res))

输出：

The date, weekday : 13 5
Total dates with same weekday : 120

方法 2：使用sum() +生成器表达式

与上述方法类似，唯一的区别是生成器表达式用于嵌套循环的任务，sum() 执行对正确找到的年月组合求和的任务。

蟒蛇3

# Python3 code to demonstrate working of
# Count date on weekday in Year Range
# Using sum() + generator expression
from datetime import datetime
  
# initializing date
date = 13
  
# initializing weekday
weekdy = 5
  
# initializing range of Years
strt, end = 1950, 2020
  
# printing Number
print("The date, weekday : " + str(date) + " " + str(weekdy))
  
# sum performs accumulation
res = sum(datetime(year, month, date).weekday() == weekdy
          for year in range(strt, end + 1) for month in range(1, 13))
  
# printing result
print("Total dates with same weekday : " + str(res))

输出：

The date, weekday : 13 5
Total dates with same weekday : 120