用秒计算日期、月份和年份的Python程序

给定秒数，任务是编写一个Python程序来计算从 1947 年 1 月 1 日起采用 MM-DD-YYYY 格式的日期、月份和年份。

例子：

Input: 0
Output: 01-01-1947

Input: 123456789
Output: 11-29-1950

Input: 9876543210
Output: 12-22-2259

循序渐进的方法：

• 创建一个函数来获取一年中的天数。

Python

# function to get number of
# days in the year
# if leap year then 366
# else 365
def dayInYear(year):
    
    if (year % 4) == 0:
        
        if (year % 100) == 0:
            
            if (year % 400) == 0:
                return 366
            else:
                return 365
                
        else:
            return 366
            
    else:
        return 365

• 创建一个函数来计算 1947 年之后的年份。

蟒蛇3

# counting the years after 1947 
def getYear(days):
    year = 1946
      
    while True:
        year += 1
        dcnt = dayInYear(year)
          
        if days >= dcnt:
            days -= dcnt
        else:
            break
    return year, days

• 创建一个函数来计算月数。

蟒蛇3

# counting the number of months
def monthCnt(days, year):
    
    if days == 0:
        return 1, 0
    else:
        month_num = 1
        months = [31, 28, 31, 30, 31,
                  30, 31, 31, 30, 31,
                  30, 31]
          
        if dayInYear(year) == 366:
            months[1] = 29
              
        for day in months:
            
            if day < days:
                month_num += 1
                days -= day
            else:
                break
                  
        return month_num, days

• 创建一个函数以使用秒数获取日期。

蟒蛇3

# getting date using number of seconds
def getDate(num_sec):
      
    # converting seconds into days
    days_sec = 24*60*60
    days = num_sec//days_sec
    day_started = False
      
    # if some seconds are more
    if days % days_sec != 0:  
        day_started = True
          
    # getting year    
    year, days = getYear(days)  
      
     # getting month
    month, days = monthCnt(days, year) 
  
    if day_started or num_sec == 0:
        days += 1
  
    # preparing date_format
    date = ""
    if month < 10:
        date = date+"0"+str(month)
    else:
        date = date+str(month)
  
    date = date+"-"
  
    if days < 10:
        date = date+"0"+str(days)
    else:
        date = date+str(days)
  
    date = date+"-"
  
    date = date+str(year)
  
    return date

• 创建驱动程序代码并调用所需的函数。

蟒蛇3

# Driver Code
  
# returns 01-01-1970
date_format = getDate(0)
print(date_format)
  
# returns 11-29-1973
date_format = getDate(123456789)
print(date_format)
  
# returns 12-22-2282
date_format = getDate(9876543210)
print(date_format)

以下是基于上述逐步方法的完整程序：

蟒蛇3

# function to get num of 
# days in the year
# if leap year then 366
# else 365
def dayInYear(year):
    if (year % 4) == 0:
        if (year % 100) == 0:
            if (year % 400) == 0:
                return 366
            else:
                return 365
        else:
            return 366
    else:
        return 365
  
      
# counting the years after 1947
def getYear(days):
    year = 1946
    while True:
        year += 1
        dcnt = dayInYear(year)
        if days >= dcnt:
            days -= dcnt
        else:
            break
    return year, days
  
  
# counting the number of months
def monthCnt(days, year):
    if days == 0:
        return 1, 0
    else:
        month_num = 1
        months = [31, 28, 31, 30, 31, 
                  30, 31, 31, 30, 31, 
                  30, 31]
        if dayInYear(year) == 366:
            months[1] = 29
        for day in months:
            if day < days:
                month_num += 1
                days -= day
            else:
                break
        return month_num, days
  
  
# getting date using number of seconds
def getDate(num_sec):
      
    # converting seconds into days
    days_sec = 24*60*60
    days = num_sec//days_sec
    day_started = False
      
    # if some seconds are more
    if days % days_sec != 0:  
        day_started = True
          
    # getting year    
    year, days = getYear(days)  
      
     # getting month
    month, days = monthCnt(days, year) 
  
    if day_started or num_sec == 0:
        days += 1
  
    # preparing date_format
    date = ""
    if month < 10:
        date = date+"0"+str(month)
    else:
        date = date+str(month)
  
    date = date+"-"
  
    if days < 10:
        date = date+"0"+str(days)
    else:
        date = date+str(days)
  
    date = date+"-"
  
    date = date+str(year)
  
    return date
    
  
# Driver Code
  
# returns 01-01-1970
date_format = getDate(0)
print(date_format)
  
# returns 11-29-1973
date_format = getDate(123456789)
print(date_format)
  
# returns 12-22-2282
date_format = getDate(9876543210)
print(date_format)

输出：

01-01-1947
11-29-1950
12-22-2259