[Tutor] List and Indexing error.

[SA]

On 8/14/02 1:26 AM, "Gregor Lingl" <glingl@aon.at> wrote:

> SA schrieb:
> 
>> I'm getting a persistent indexing error whenever I run the following script:
>> 
>> #!/usr/bin/env python
>> 
>> import re
>> import os
>> import string
>> 
>> list = os.listdir('.')
>> l = len(list)
>> print "The number of items in this dir is: ",  l
>> for i in range(l):
>>    input = open(list[i], "rb")
>>    text = input.read()
>>    input.close()
>>    text2 = re.findall(r".*", text)
>>    if text2[78] == "<hr>":
>>        text3 = string.join(text2[79:])
>>        output = open(list[i], "wb")
>>        output.write(text3)
>>        output.close()
>>    else:
>>        print list[i] + " does not have the correct begin length ..."
>> 
>> Basically, I have a folder full of html files. I need to get rid of the
>> first part of each file. I figured the correct index. But when I run it I
>> get the following:
>> The number of items in this dir is:  148
>> Traceback (most recent call last):
>>  File "./repy2.py", line 20, in ?
>>    if text2[78] == "<hr>":
>> IndexError: list index out of range
>> 
>> Anyone know why?
>>  
>> 
> Looks as if text2 didn't have 78 items.
> Put a print text2 after the line
> 
>   text2 = re.findall(r".*", text)
>   print text2
> 
> to have a look at it.
> Possibly (if working in IDLE for instance) you
> may write
> 
>>>> text2        # or
>>>> len(text2) 
> 
> to get smoe information
> 
> Gregor
> 
> after the error-message to see what's the case
Sorry, I should have mentioned this before. I already tried that and there
is ~1300 items in text2 for all of the html files. This script actually
works without the indexing error if I get rid of the if section and rewrite
within the for section so that there is not another iteration call:

for i in range(l):
    input = open(list[i], "rb")
    text = input.read()
    input.close()
    text2 = re.findall(r".*", text)
    text3 = string.join(text2[79:])
    output = open("../Q/"+list[i], "wb")
    output.write(text3)
    output.close()

This works without a hitch and removed the proper material from each file
(over 140 files). The only reason why I wanted the if statement was so that
I could do an if:else test in case a file did not have the proper file size.

Any ideas?

Thanks.
SA

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