文本读取和列表索引超出Python范围

Question

I have a text that has 8 rows. The program will read this text and match the word in the text with the word that user enters. But python gives a mistake:

satir=dosya.readlines()[a]
IndexError: list index out of range

This is my code:

a=0
c=0
while a<8:
    satir=dosya.readlines()[a]
    a=a+1
    for i in olasilik:
        if ((olasilik[c]+"\n")==satir):
            c=c+1
            print(olasilik[c])

Answer 1

this is not how you should do it

instead do

for satir in dosya:
   #do something

Answer 2

The problem is that readlines() reads all the content of the file in a list the first time you call it. The second time you call it the file is already finished and you get an empty list and you get an error trying to access element 1 of that empty list.

To loop over the lines of the file you can do

for L in f:
    ...

or

for L in f.readlines():
    ...

Answer 3

This would probably work better:

for satir in dosya.readlines():
  for o in olasilik:
    if ("%s\n" % o) == satir:
      print o