Indentation error for python 2.7

Question

def ispermute(str1, str2):
    d1 = {}
    d2 = {}
    for letter in str1:
        if letter not in d1:
            d1[letter] = 1
        else:
            d1[letter] += 1

    for letter in str2:
        if letter not in d2:
            d2[letter] = 1
        else:
            d2[letter] +=1

    if d1 != d2:
        return False
    return True

While running this I am getting error as:

File "2.py", line 16
    if d1 != d2:
               ^
IndentationError: unindent does not match any outer indentation level

Can someone suggest what is the issue? This code is made to check the permutation of two strings.

Answer 1

You have mixed tabs and spaces in your code. If you are usings Sublime Text (as stated in the comments) you can:

1. Select all your text ( Ctrl + A )
2. View -> Indentation -> Convert Indentation to Spaces

You can avoid the problem in the future by turning on "Indent Using Spaces" under the View -> Indentation tab.