python - 调整闹钟时间以匹配python中的时钟时间

Question

我刚开始学习 Python，作为 friend 向我建议的基本挑战之一，我一直在研究闹钟。我成功地制作了一个在预定时间播放 .wav 声音的闹钟。现在我一直在使用 Pygame 作为 GUI，一切都很好，直到我不得不设置按钮来调整闹钟时间。看到当我比较闹钟时间和时钟时间时，时钟时间是字符串形式，所以闹钟时间也必须是字符串形式。但是按钮无法从字符串中 + 或 - ，所以我有点卡住了。我尝试了将它变成字符串的方法，但到目前为止一切都相当不成功。想知道这里是否有人有建议。

代码如下:

#!/usr/bin/python
import os.path, sys, datetime, time
import os, sys, math
import pygame, random
from pygame.locals import *

main_dir = os.path.split(os.path.abspath(__file__))[0]
data_dir = os.path.join(main_dir, 'data')
currenttime = datetime.datetime.now()
clocktime = currenttime.strftime("%H:%M")
alarmtime = "13:23"
pygame.init()

#Screen and background
width, height = 600, 600
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("Alarm Clock")
background = pygame.image.load(os.path.join(data_dir, 'diamondplate.jpg'))
background = pygame.transform.scale(background, (width, height))

#Current time
font = pygame.font.Font(None, 250)
text = font.render("%s" % clocktime, True, (255,140,0), (0,0,0))
textRect = text.get_rect()
textRect.centerx = screen.get_rect().centerx
textRect.centery = screen.get_rect().centery - 200

#Alarm time
text2 = font.render("%s" % '00:00', True, (255,140,0), (0,0,0))
text2Rect = text2.get_rect()
text2Rect.centerx = screen.get_rect().centerx
text2Rect.centery = screen.get_rect().centery + 200

#Alarm noise
def alarmsound(file_path=os.path.join(main_dir, 'data', 'boom.wav')):
    pygame.mixer.init(11025)
    sound = pygame.mixer.Sound(file_path)
    channel = sound.play()
    pygame.time.wait(1000)

#Image load function
def load_image(file):
    file = os.path.join(data_dir, file)
    surface = pygame.image.load(file)
    return surface.convert_alpha()

#Hour arrow up
class Hourup(pygame.sprite.Sprite):

    def __init__(self):
        pygame.sprite.Sprite.__init__(self,self.groups)
        image = load_image('arrowup.png')
        image = pygame.transform.scale(image, (85,85))
        self.image = image
        self.rect = self.image.get_rect()
        surface = pygame.display.get_surface()
        self.area = surface.get_rect()
        self.rect.bottomleft = text2Rect.topleft

    def click_check(self,eventpos):
        if self.rect.collidepoint(eventpos):
            pass

    def update(self):
        pass

#Hour arrow down
class Hourdown(pygame.sprite.Sprite):

    def __init__(self):
        pygame.sprite.Sprite.__init__(self,self.groups)
        image = load_image('arrowdown.png')
        image = pygame.transform.scale(image, (85,85))
        self.image = image
        self.rect = self.image.get_rect()
        surface = pygame.display.get_surface()
        self.area = surface.get_rect()
        self.rect.bottom = text2Rect.top
        self.rect.left = 159

    def click_check(self,eventpos):
        if self.rect.collidepoint(eventpos):
            pass    

    def update(self):
        pass

#Minute arrow up
class Minuteup(pygame.sprite.Sprite):

    def __init__(self):
        pygame.sprite.Sprite.__init__(self,self.groups)
        image = load_image('arrowup.png')
        image = pygame.transform.scale(image, (85,85))
        self.image = image
        self.rect = self.image.get_rect()
        surface = pygame.display.get_surface()
        self.area = surface.get_rect()
        self.rect.bottomright = (442,414)

    def click_check(self,eventpos):
        if self.rect.collidepoint(eventpos):
            pass

    def update(self):
        pass

#Minute arrow down
class Minutedown(pygame.sprite.Sprite):

    def __init__(self):
        pygame.sprite.Sprite.__init__(self,self.groups)
        image = load_image('arrowdown.png')
        image = pygame.transform.scale(image, (85,85))
        self.image = image
        self.rect = self.image.get_rect()
        surface = pygame.display.get_surface()
        self.area = surface.get_rect()
        self.rect.bottomright = text2Rect.topright

    def click_check(self,eventpos):
        if self.rect.collidepoint(eventpos):
            pass

    def update(self):
        pass


#Groups
allsprites = pygame.sprite.Group()
Hourup.groups = allsprites
Hourdown.groups = allsprites
Minutedown.groups = allsprites
Minuteup.groups = allsprites
hourup = Hourup()
hourdown = Hourdown()
minutedown = Minutedown()
minuteup = Minuteup()
clickableobjects = [hourup, hourdown, minutedown, minuteup]

def main():
    while 1:
        currenttime = datetime.datetime.now()
        clocktime = currenttime.strftime("%H:%M")
        screen.blit(background,(0,0))
        text = font.render("%s" % clocktime, True, (255,140,0), (0,0,0))
        text2 = font.render("%s" % alarmtime, True, (255,140,0), (0,0,0))
        screen.blit(text,textRect)
        screen.blit(text2,text2Rect)
        for event in pygame.event.get():
            if event.type == pygame.QUIT or (event.type == KEYDOWN and event.key == K_ESCAPE):
                sys.exit()
            if event.type == MOUSEBUTTONDOWN:
                if event.button == 1:
                    for object in clickableobjects:
                        object.click_check(event.pos)

        if clocktime == alarmtime and soundcheck = False:
            alarmsound()
            soundcheck = True
        allsprites.draw(screen)
        allsprites.update()
        pygame.display.update()
        pygame.display.flip

if __name__ == '__main__':
    main()

Answer 1

您正在寻找将字符串转换为日期时间实例的 strptime()。

参见 here了解如何正确使用它。

比较两个 datetime 实例会给你一个 timedelta 实例，你可以阅读关于 here 的内容.本质上，它会为您提供两个时间之间的差异，精确到毫秒。

了解有关日期时间、时间和日历模块的所有信息。一旦您学会了在 Python 中处理时间和日期，就会变得非常容易。