Syntax error when reading data in with input()

Question

I've been trying to code a simple calculator on python GUI but I'm getting a syntax error message. I am new to programming so I am unsure what do.

Traceback (most recent call last):
  File "C:\Users\kmart3223\Desktop\Martinez_K_Lab1.py", line 126, in <module>
    main()
  File "C:\Users\kmart3223\Desktop\Martinez_K_Lab1.py", line 111, in main
    operation = input("What operations should we do ( +, -, /, *):")
  File "<string>", line 1
    +
    ^
SyntaxError: unexpected EOF while parsing

Code

def main():
    operation = input("What operations should we do ( +, -, /, *):")
    if(operation != '+' and operation != '-' and operation != '/' and operation != '*'):
        print ("chose an operation")
    else:
        variable1 = int(input("Enter digits"))
        variable2 = int(input("Enter other digits"))
        if (operation == "+"):
            print (add(variable1, variable2))
        elif (operation == "-"):
            print (sub(variable1, variable2))
        elif (operaion == "*"):
            print (mul(variable1, variable2))
        else:
            print (div(variable1, variable2))
main()

@Drew Duplicate too [Python 2.7 getting user input and manipulating as string without quotations](http://stackoverflow.com/q/4960208) — Bhargav Rao, Apr 03 '16 at 21:31

Hackaholic · Answer 1 · 2016-04-03T19:32:54.917

2

if you are using python 2x use raw_input()

>>> input()         # only takes python expression
>>> input()
+
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 1
    +
    ^
SyntaxError: unexpected EOF while parsing
>>> input()
'+'                 # string ok
'+'
>>> input()
7                   # integer ok
7
>>> raw_input()              # Takes input as string
+
'+'

edited Apr 03 '16 at 19:32

answered Apr 03 '16 at 19:24

Hackaholic

19,069
5
54
72

1

Yup. To help OP it would probably help to replicate their error in that same context you are answering to help them visualize what is going on. Use `+`, for example as input instead of `hello` – idjaw Apr 03 '16 at 19:27
1

@idjaw updated, thanks – Hackaholic Apr 03 '16 at 19:33
Specifically, `input()` tries to evaluate the input as if it was a python expression. So passing `5+7` in the input will return 12. And just as in a normal script, just writing `+` is invalid syntax. – Reti43 Apr 03 '16 at 19:43

score 0 · Answer 2 · answered Apr 03 '16 at 19:23

0

use raw_input() instead of input()

input() interprets the data you enter as a Python expression. raw_input() on the other hand returns the string you enter.

answered Apr 03 '16 at 19:23

Vasanth

1,238
10
14

Syntax error when reading data in with input()

2 Answers2