Need help identifying the indentation error in a code block

Question

I tried defining a function below (part of a longer code block), but came across an 'indentation error' identified at the 4th line. Could somebody please tell me what the error is?

guess = int(raw_input('Your first guess?  '))
def next_guess(n):
    n -= 1
    print "You now have %s attempts left" %n
    guess = int(raw_input('Your next guess?  '))

Answer 1

Your indentation is a mix of tabs and spaces. The tab character might look like it's four spaces wide in your text editor/IDE, but Python can interpret it as anywhere between one and eight spaces. This can cause Python to become very confused. Replace the tab on your n -= 1 line with spaces.