Counting iterations

[Fredrik Lundh]

Derek Basch wrote:

> ooops you are right. Should have been:
>
> pets = ["cat", "dog", "bird"]
> num_pets = 0
> for i in pets:
>    num_pets += 1
>    print "pet" + "#" + num_pets

Traceback (most recent call last):
  File "example.py", line 5, in ?
    print "pet" + "#" + num_pets
TypeError: cannot concatenate 'str' and 'int' objects

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