TypeError: unsupported operand type(s) for -: 'int' and 'str' in Python

Dung Do Tien Sep 20 2021 7

Hello you guys, I am a newbie in Python and I'm also studying more about Python.

I have some lines of code,  I am writing a program to find the day of the week and the program runs smoothly until this block. Function as below:

 D = input()
A = ( (14 - 'month') /12)
Y = ( 'Year' - 'A' )
MonthProblem = ( 'month' + 12 * 'A' - 2 )
week = ( ('D' + 'Y' + 'Y'/4 - 'Y'/100 + 'Y'/400 + 31 * 'MonthProblem'/12) % 7 )

But I get an exception TypeError: unsupported operand type(s) for -: 'int' and 'str' when I run code above.

 Traceback (most recent call last):
  File "main.py", line 1, in <module>
    A = ( (14 - 'month') /12)
TypeError: unsupported operand type(s) for -: 'int' and 'str'

And I am using python 3.8.2

Anyone can explain it to me? How can I solve it?

Thanks for any response.

Have 2 answer(s) found.
  • P

    Phuong Phan Sep 20 2021

    Why do you can a variable wih ''?

    Please use variables by their name directly, without ''. The words in ''indicate a string, not a variable.

    In your case, the code should be changed as follows :

     D = input()
    A = ( (14 - month) /12)
    Y = ( Year - A )
    MonthProblem = ( month + 12 * A - 2 )
    week = ( (D + Y + Y/4 - Y/100 + Y/400 + 31 * MonthProblem/12) % 7 )

    if you have defined the variables.

  • U

    Ubonwan Raksasat Sep 20 2021

    I feel you are wrong about way do use a variable.

    'D' is a string value and it is not a variable get from user input. So please change 'D' to D

     D = input()
    A = ( (14 - month) /12)
    Y = ( Year - A )
    MonthProblem = ( month + 12 * A - 2 )
    week = ( (D + Y + Y/4 - Y/100 + Y/400 + 31 * MonthProblem/12) % 7 ) 
Leave An Answer
* NOTE: You need Login before leave an answer

* Type maximum 2000 characters.

* All comments have to wait approved before display.

* Please polite comment and respect questions and answers of others.

Popular Tips

X Close