Seek the one billionth line in a file containing 3 billion lines.

Bruno Desthuilliers bruno.42.desthuilliers at wtf.websiteburo.oops.com
Wed Aug 8 14:02:56 CEST 2007


Ant a écrit :
> On Aug 8, 11:10 am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
>> Jay Loden a écrit :
>> (snip)
>>
>>> If we just want to iterate through the file one line at a time, why not just:
>>> count = 0
>>> handle = open('hugelogfile.txt')
>>> for line in handle.xreadlines():
>>>     count = count + 1
>>>     if count == '1000000000':
>>>         #do something
>> for count, line in enumerate(handle):
>>      if count == '1000000000':
>>          #do something
> 
> You'd get better results if the test were:
> 
> if count == 1000000000:
> 
> Or probably even:
> 
> if count == 999999999:
> 
> Since the 1 billionth line will have index 999999999.
> 

Doh :(

Thanks for the correction.



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