[Solved] Why is it saying that the = in bold is an invalid syntax? [duplicate]

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Multiple issues here:

  1. assignment from input into a variable cannot be checked in while-loop, you should split it into assignment and check.

  2. else cannot contain a condition

  3. you also had a bug in printing the results – you printed num1 twice

  4. The indentations are meaningful in Python – please make sure to post it properly indented next time

A fix for the issues above:

def calc():
    print('Select operation')
    print('Choose from:')
    print('+')
    print('-')
    print('*')
    print("https://stackoverflow.com/")

    choice=input('Enter choice (+,-,*,/):')

    num1=int(input('Enter first number:'))
    num2=int(input('Enter second number:'))
    if choice == '+':
        print("{}+{}={}".format(num1, num2, num1+num2))

    elif choice == '-':
        print("{}-{}={}".format(num1, num2, num1-num2))

    elif choice == '*':
        print("{}*{}={}".format(num1, num2, num1*num2))

    elif choice == "https://stackoverflow.com/":
        print("{}/{}={}".format(num1, num2, num1/num2))
    else:
        print('Invalid input')


if __name__ == '__main__':
    restart="y"
    while restart:
        if restart == 'y':
            print('restart')
            calc()
            restart = input('Do you want to restart the calculator y/n')    
        elif restart == 'n':
            print('Thanks for using my program')
            break

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solved Why is it saying that the = in bold is an invalid syntax? [duplicate]