停止 main() 函数自动启动

Question

程序第一次运行后（当我输入选项时）主功能再次自动启动，我想让它不自动启动，而是问你是否想再次运行程序或退出程序，如果我选择运行程序，则 main() 函数再次启动，否则程序结束。

file=open("nomobile.txt","w")
text=" If The worLd was Ending , yOU WIll come over right, u will come over and stay the 9it"
file.write(text)

file=open("nomobile.txt",'r')
characters=file.read()


vowels=0

consonants=0

uppercase=0

lowercase=0

for ch in characters:

    if ch.islower():
        lowercase+=1
    elif ch.isupper():
        uppercase+=1
    ch=ch.lower()
    if ch in "aeiou":
        vowels+=1
    elif ch in "bcdfghjklmnpqrstvwxyz":
        consonants+=1
file.close()

def main():
    
    while True:
        print("What do you want to know about?")
        print("Press 1 to know about uppercase letters")
        print("Press 2 to know about lowercase letters")
        print("Press 3 to know about vowels")
        print("Press 4 to know about consonants")
        print("Press 5 to know about all of them at once")

        choice=int(input("Press number:"))
        if choice == 1:
            print("The number of uppercase letters present are", uppercase)
        elif choice == 2:
            print("The number of lowercase letters present are", lowercase)
        elif choice == 3:
            print("The number of vowels present are",vowels)
        elif choice == 4:
            print("The number of consonants present are",consonants)
        elif choice == 5:
            print("The number of uppercase letters present are", uppercase)
            print("The number of lowercase letters present are", lowercase)
            print("The number of vowels present are",vowels)
            print("The number of consonants present are",consonants)
        else:
            break
        

main()

Answer 1

您可以简单地在主函数中添加另一个提示，即：

from sys import exit

file = open("nomobile.txt", "w")
text = "If The worLd was Ending , yOU WIll come over right, u will come over and stay the 9it"
file.write(text)

file = open("nomobile.txt", "r")

characters = file.read()
vowels = 0
consonants = 0
uppercase = 0
lowercase = 0

for ch in characters:
    if ch.islower():
        lowercase += 1
    elif ch.isupper():
        uppercase += 1
    ch = ch.lower()
    if ch in "aeiou":
        vowels += 1
    elif ch in "bcdfghjklmnpqrstvwxyz":
        consonants += 1
file.close()


def main():

    while True:
        print("What do you want to know about?")
        print("Press 1 to know about uppercase letters")
        print("Press 2 to know about lowercase letters")
        print("Press 3 to know about vowels")
        print("Press 4 to know about consonants")
        print("Press 5 to know about all of them at once")

        choice = int(input("Press number:"))
        if choice == 1:
            print("The number of uppercase letters present are", uppercase)
        elif choice == 2:
            print("The number of lowercase letters present are", lowercase)
        elif choice == 3:
            print("The number of vowels present are", vowels)
        elif choice == 4:
            print("The number of consonants present are", consonants)
        elif choice == 5:
            print("The number of uppercase letters present are", uppercase)
            print("The number of lowercase letters present are", lowercase)
            print("The number of vowels present are", vowels)
            print("The number of consonants present are", consonants)
        else:
            break

        print("Do you want to run the program again?")
        print("Press 0 to exit")
        print("Press 1 to continue")

        choice = int(input("Press number:"))
        if choice == 0:
            print("Exiting")
            exit(0)


main()