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Python

Calculator in python

So I am 'trying' to write a calculator in python and I am getting an indentation error. The code is at this address (I'm sorry it's really long)

http://pythontutor.com/visualize.html#code=equ+%3D+raw_input('Enter+the+problem%3A+')%0Aequ+%3D+equ.split('+')%0A%0Adef+error()%3A%0A%09print+'Please+enter+a+problem+with+the+following+format'%0A%09print+'number+operator+number'%0A%0Adef+convert()%3A%0A%09global+equ%0A%09if+str.isdigit(equ%5B0%5D)%3A%0A%09%09equ%5B0%5D+%3D+float(equ%5B0%5D)%0A%09if+str.isdigit(equ%5B2%5D)%3A%0A%09%09equ%5B2%5D+%3D+float(equ%5B2%5D)%0A%09else%3A%0A%09%09error()%0A%0Adef+solve(a,+b,+c)%3A%0A%09error_flag+%3D+'+'%0A%09if+b+%3D%3D+'%2B'%3A%0A%09%09answer+%3D+a+%2B+c%0A%09elif+b+%3D%3D+'-'%3A%0A%09%09answer+%3D+a+-+c%0A%09elif+b+%3D%3D+'*'%3A%0A%09%09answer+%3D+a+*+c%0A%09elif+b+%3D%3D+'/'%3A%0A%09%09answer+%3D+a+/+c%0A%09else%3A%0A++++++++print+'an+error'%0A++++print+'always+print+this'%0Aconvert()%0Asolve(equ%5B0%5D,+equ%5B1%5D,+equ%5B2%5D)%0A%0A%0A&mode=edit&origin=opt-frontend.js&cumulative=false&heapPrimitives=false&drawParentPointers=false&textReferences=false&showOnlyOutputs=false&py=2&rawInputLstJSON=%5B%5D

1 Answer

Chris Shaw
Chris Shaw
26,650 Points

Hi,

You're currently receiving an indentation error because you have mixed tabs and spaces which don't work together in Python as you're required to choose one or the other, I've reformatted your function which worked after I updated the code in the link provided.

def solve(a, b, c):
    error_flag = ' '

    if b == '+':
        answer = a + c
    elif b == '-':
        answer = a - c
    elif b == '*':
        answer = a * c
    elif b == '/':
        answer = a / c
    else:
        print 'an error'

    print 'always print this'