Problem with lists

[WIWA]

Hi,

I'm writing an application to analyse my Apache access_log file. In
the below script (which is based on an example I found in 'How to
think as a Programmer'-) I want to measure the amount of hits per
hour. I know it is not the best algorithm but it works for now.

I see some strange things: on rather small (it must be +/- < 4000 )
entries in the access_log, my script works fine. Above this limit, I
get the following error.

Traceback (most recent call last):
File "hits_per_uur.py", line 18, in
lijst.append(int(datum[1]))
IndexError: list index out of range

Question: do lists have a limit? Anyone know how I can change this
simple script so that it works for more entries as well.

------------------------------------------------------------------------------
import sys,string

def inbucket(lijst, low, high):
count=0
for num in lijst:
if low<=num<high:
count=count+1
return count

f=open('c:/summary.txt','a',1)
f.write("Hits per uur" + "\n")

lijst=['']*0
data=sys.stdin.readlines()
for line in data:
words=string.split(line)
datum=string.split(words[3],':') # datum bevat de volledige datum:
[16/Sep/2003:05:22:57 +0200]
lijst.append(int(datum[1]))

numbuckets=24
buckets= [0]*numbuckets
bucketwidth=24/numbuckets
for i in range(numbuckets):
low=i* bucketwidth
high=low+bucketwidth
buckets[i]=inbucket(lijst,low,high)

for num in range(len(buckets)):
output=str(num) + "\t" + str(buckets[num]) + "\n"
f.write(output)

f.close()

[David C. Fox]

WIWA wrote:

Hi,

I'm writing an application to analyse my Apache access_log file. In
the below script (which is based on an example I found in 'How to
think as a Programmer'-) I want to measure the amount of hits per
hour. I know it is not the best algorithm but it works for now.

I see some strange things: on rather small (it must be +/- < 4000 )
entries in the access_log, my script works fine. Above this limit, I
get the following error.

Traceback (most recent call last):
File "hits_per_uur.py", line 18, in
lijst.append(int(datum[1]))
IndexError: list index out of range

The error could be in datum[1]. Did you double-check that datum has at
least two elements?

David

[Erik Max Francis]

WIWA wrote:

I see some strange things: on rather small (it must be +/- < 4000 )
entries in the access_log, my script works fine. Above this limit, I
get the following error.
It probably means that there's an entry in the log that isn't what you
expect. The error is being generated by the input data; print the
contents of `datum' before you run that code, or check it out in a
debugger, to see what it contains.
Question: do lists have a limit? Anyone know how I can change this
simple script so that it works for more entries as well.

No, lists do not have any such limitation. The code that's generation
the exception isn't dealing with a large list, anyway.

--
Erik Max Francis && ma*@alcyone.com && http://www.alcyone.com/max/
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