Question

我正在学习python。我写这段代码。我尝试使用main来转换函数中的这个python代码。我知道该怎么做。有人可以帮助我。我尝试了3个多小时。现在我的思绪停止了。我真的很感激你的帮助。

isExit = 0

count = 0

total_int = 0

而True：

total_int = 0

count = 0

print ("\n")

print ("1) Credit Card Payoff Summary")

print ("2) Credit Card Payoff Details")

print ("3) Exit ")

choice = (int)(input("Enter your choice - "))

if(choice == 1):

    balance = (float)(input("Enter your credit card balance - "))

    apr = (float)(input("Enter Annual Percentage Rate - "))

    print ("1) Interest on current balance + 1% of current balance.")

    print ("2) 2% of current balance.")

    select = (int)(input("Select your choice - "))

    if(select == 1):

        if(balance <= 0 or apr <= 0) : #checking if balance or APR is 0 or not

            print ("Interest cannot be calculated as balance or APR is 0.")

        else :

            while (balance > 0) :

                m_interest = float(balance) * (apr/ 1200)

                min_month_pay = m_interest + (0.01 * balance)

                if (min_month_pay < 15):

                    min_month_pay = 15

                principal_paid = min_month_pay - m_interest

                balance = balance - principal_paid

                total_int += m_interest

                count += 1

            years = (float)(count / 12)

            print ("Years required to payoff card : ", round(years, 2)) #round() is used to format the float number upto 2 decimal place.

            print ("Total interest paid : ", round(total_int,2))

elif(select == 2):

    if(balance <= 0 or apr <= 0) :

        print ("Interest cannot be calculated as balance or APR is 0.")

    else :

        while (balance > 0) :

            m_interest = float(balance) * (apr/ 1200)

            min_month_pay = 0.02 * balance

            if (min_month_pay < 15):

                min_month_pay = 15

            principal_paid = min_month_pay - m_interest

            balance = balance - principal_paid

            total_int += m_interest

            count += 1

        years = (float)(count / 12)

        print ("Years required to payoff card : ", round(years, 2))

        print ("Total interest paid : ", round(total_int, 2))

else :

    print ("Invalid selection.")
    if(choice == 2):
        balance = (float)(input("Enter your credit card balance - "))

        apr = (float)(input("Enter Annual Percentage Rate - "))

    print ("1) Interest on current balance + 1% of current balance.")

    print ("2) 2% of current balance.")

    select = (int)(input("Select your choice - "))

    if(select == 1):

        if(balance <= 0 or apr <= 0) :

            print ("Interest cannot be calculated as balance or APR is 0.")

        else :

            print ("Month Min. Int. Princ. Rem. Pay. Paid Paid Bal.") #headers of the detail

            while (balance > 0) :

                m_interest = float(balance) * (apr/ 1200)

                min_month_pay = m_interest + (0.01 * balance)

                if (min_month_pay < 15):

                    min_month_pay = 15

                principal_paid = min_month_pay - m_interest

                balance = balance - principal_paid

                total_int += m_interest

                count += 1

                print (count, " ", round(min_month_pay, 2), " ", round(m_interest, 2), " ", round(principal_paid, 2), " ", round(balance, 2)) #This will print the detail line by line

            years = (float)(count / 12)

            print ("Years required to payoff card : ", round(years, 2))

            print ("Total interest paid : ", round(total_int, 2))

if(select == 2):

    if(balance <= 0 or apr <= 0) :

        print ("Interest cannot be calculated as balance or APR is 0.")

    else :

        print ("Month Min. Int. Princ. Rem. Pay. Paid Paid Bal.")

        while (balance > 0) :

            m_interest = float(balance) * (apr/ 1200)

            min_month_pay = 0.02 * balance

            if (min_month_pay < 15):

                min_month_pay = 15

            principal_paid = min_month_pay - m_interest

            balance = balance - principal_paid

            total_int += m_interest

            count += 1

            print (count, " ", round(min_month_pay, 2), " ", round(m_interest, 2), " ", round(principal_paid, 2), " ", round(balance, 2))

        years = (float)(count / 12)

        print ("Years required to payoff card : ", round(years, 2))

        print ("Total interest paid : ", round(total_int, 2))

else :

        print ("Invalid selection.")

if (choice == 3):

        print ("Application is terminating now.")

        isExit = 1

else:

        print ("Invalid Choice.")

if(isExit):

    break

Answer 1

您正在寻找此声明

if __name__ == '__main__':

选择所有代码ctrl+a，按tab缩进，然后将上述语句放在代码的开头

<强>解释

当Python解释器读取python文件时，该文件是2个中的一个，它是带有main方法的程序，或者是一个其他主文件导入的模块。此属性存储在名为__name__的变量中。如果__name__的值等于'__main__'，则它向解释器指示该文件旨在作为程序（main）运行。否则，该文件很可能是从其他程序导入的。

虽然据我所知，你实际上并不需要这个陈述。如果你只是按顺序运行一堆代码而不使用任何主声明，那么这也很好。大多数人把它放在文件的底部，然后调用上面声明的函数，如下所示：

def func1():
    print("function 1")
    some_string = "hello"
    return some_string

def func2():
    print("function 2")


if __name__ == '__main__':
   print("here is the main method where you can call functions above")
   results = func1()
   func2()

如何将python代码转换为函数

1 个答案: