öpcaö variable refrenced before assignment

Newsgroups	comp.lang.python
Date	2013-10-09 07:20 -0700
Message-ID	<9610dace-0175-424a-b226-c401ce0f98b2@googlegroups.com> (permalink)
Subject	öpcaö variable refrenced before assignment
From	markotaht@gmail.com

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fail4 = "palgad.txt"

f4 = open(fail4, "r")

def koguarv_ridu failis(f):
    for i, l in enumerate(f):
        pass
    return i+1

def palgad(f4):
    palgad = 0
    while True:
        f4r = f4.readline()
        if f4r == "":
            break
        palgad += int(f4r[f4r.find(";")+1:])
    return palgad

def kuu_keskmine(palgad, f):
    return palgad/koguarv_ridu_failis(f)

print(kuu_keskmine(palgad(f4), f4))


Why does it give me local variable "i" referenced before assignment in koguarv_ridu_failis(f) on the return i+1 line
But if i do directly koguarv_ridu_failis(f4) then i get correct antswer.

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öpcaö variable refrenced before assignment markotaht@gmail.com - 2013-10-09 07:20 -0700
  Re: öpcaö variable refrenced before assignment Chris Angelico <rosuav@gmail.com> - 2013-10-10 01:41 +1100
  Re: öpcaö variable refrenced before assignment Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2013-10-09 17:52 +0300
  Re: öpcaö variable refrenced before assignment markotaht@gmail.com - 2013-10-09 08:15 -0700
    Re: öpcaö variable refrenced before assignment Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-10-09 16:37 +0100

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