CSV file into a python list is not completely imported

[socertis]

i want to read a csv file into a python list. sometimes, it produces an

Error:
IOError: [Errno 0]

i have searched a lot and tried to use flush() or seek(0,1) functions. i am using the csv built-in module in python. also, i used pandas.read_csv. but always, the list in not complete sometimes. i am working on windows 10 machine, with python2.7 64-bit.
here is my code:

import csv
from io import open

j = 0
k=0
csv_filename = 'G:\work and courses\Medrar\heirarchies\hier1.csv'
directories_lst = []

def fn():
    global j
    global k        
    global directories_lst
    try:
        csvFile = open(csv_filename,'r')      
        directories_lst=[row for row in map(list, csv.reader(csvFile))[1:]]
        csvFile.close()
        for i in directories_lst:
            try:
                print i    
            except:
                k = k+1
    except:
        j = j+1        
        fn()

when that function ran for about 1000 times, it produces like 300 exceptions, at the body of the for loop. everybody say that it is a problem with python io module implementation in windows. i need a workaround to solve that problem.
that all the content of my .csv file. (it is just a sample)

[inline]folder_1,folder_2,folder-3,folder_4
f1,f12,f121,f1211
f1,f13,f131,f1311
f1,f11,f111,f114
f1,f14,f141,f1414
f1,f15,f151,f1514
f2,f21,f212,f2124
f2,f22,f222,f2224
f2,f23,f232,f2324
f2,f24,f242,f2424
f3,f31,f313,f3134
f3,f32,f323,f3234[/inline]