python - Python - Main() 循环不重复执行

Question

（Python新手，尽我所能）

该程序运行，并且按钮执行正确的操作。但是 MAIN() 过程块不起作用。我希望 main() 继续循环，直到用户关闭程序。在循环中是一个关于时间比较的简单决定，如果 10 秒过去了，3 个按钮将获得浅灰色背景。

我在 main() 区域尝试了一些打印语句，但它们根本不打印。我哪里错了？

谢谢一堆

from guizero import App, Text, TextBox, PushButton
import RPi.GPIO as GPIO
import sys
import time
import datetime
from datetime import timedelta
from datetime import datetime

# This procedure will watch three inputs and lock in the team that calls in first for 5seconds
# Change the colors of the buttons to show which team pressed in first.


def action1(dunno):
        # Team1 button pressed
        global SetCurrTime
        if datetime.now() > SetCurrTime + timedelta(seconds=5):
                # Mark Team 1 as the buzzer beater
                team1_btn.bg="green"
                team2_btn.bg="red"
                team3_btn.bg="red"
                SetCurrTime = datetime.now()
                txtButtons_Hit.value = "Team1 was hit: " + str(SetCurrTime)

def action2(dunno):
        # Team2 button pressed
        global SetCurrTime
        if datetime.now() > SetCurrTime + timedelta(seconds=5):
                # Mark Team 2 as the buzzer beater
                team1_btn.bg="red"
                team2_btn.bg="green"
                team3_btn.bg="red"
                SetCurrTime = datetime.now()
                txtButtons_Hit.value = "Team2 was hit: " + str(SetCurrTime)


def action3(dunno):
        # Team3 button pressed
        global SetCurrTime
        if datetime.now() > SetCurrTime + timedelta(seconds=5):
                # Mark Team 3 as the buzzer beater
                team1_btn.bg="red"
                team2_btn.bg="red"
                team3_btn.bg="green"
                SetCurrTime = datetime.now()
                txtButtons_Hit.value = "Team3 was hit: " + str(SetCurrTime)


def main():
        #reset board when 5seconds has elapsed from SetCurrTime
        app.display()
        global SetCurrTime
        print ("Here")
        while True:
                txtButtons_Hit.value = "Current Time: " + str(datetime.now())
                print ("here")
                if datetime.now() > SetCurrTime + timedelta(seconds=5):
                        # clear the board
                        team1_btn.bg="light grey"
                        team2_btn.bg="light grey"
                        team3_btn.bg="light grey"


# Pin setup
GPIO.setmode(GPIO.BCM) # Broadcom pin-numbering scheme
GPIO.setup(16, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(20, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(21, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.add_event_detect(16, GPIO.RISING, callback=action1, bouncetime=1800)
GPIO.add_event_detect(20, GPIO.RISING, callback=action2, bouncetime=1800)
GPIO.add_event_detect(21, GPIO.RISING, callback=action3, bouncetime=1800)

SetCurrTime = datetime.now() + timedelta(seconds=-5) #init this at the start of the program


app = App(title="A07 DSS Tri-State - Jeopardy", width=700)
blank1 = Text(app, text="")
welcome_message = Text(app, text="This..      is..       Jeopardy!!", size=30, font="Times New Roman", color="blue")

blank2 = Text(app, text="")
blank3 = Text(app, text="")

team1_btn = PushButton(app, text="Team Black & Blue", command = lambda:action1(1))
team1_btn.bg="light grey"
blank4 = Text(app, text="")
team2_btn = PushButton(app, text="Team Holiday Spirit", command=lambda:action2(2))
team2_btn.bg="light grey"
blank5 = Text(app, text="")
team3_btn = PushButton(app, text="Team Creamsicle", command=lambda:action3(3))
team3_btn.bg="light grey"
blank6 = Text(app, text="")
delay_timer = Text(app, text="0")
delay_timer.visible=False
blank7 = Text(app, text="")
txtButtons_Hit = Text(app, text="Current Time: " + str(SetCurrTime))


main()

标签： pythonraspberry-pi3

Answer 1

试着把它放在程序中

if __name__ == '__main__':
    main()