fseek In Compressed Files
Peter Otten
__peter__ at web.de
Thu Jan 30 11:21:28 EST 2014
Serhiy Storchaka wrote:
> 30.01.14 13:28, Peter Otten написав(ла):
>> Ayushi Dalmia wrote:
>>
>>> I need to randomly access a bzip2 or gzip file. How can I set the offset
>>> for a line and later retreive the line from the file using the offset.
>>> Pointers in this direction will help.
>>
>> with gzip.open(filename) as f:
>> f.seek(some_pos)
>> print(f.readline())
>> f.seek(some_pos)
>> print(f.readline())
>>
>> seems to work as expected. Can you tell a bit more about your usecase (if
>> it isn't covered by that basic example)?
>
> I don't recommend to seek backward in compressed file. This is very
> inefficient operation.
Do you know an efficient way to implement random access for a bzip2 or gzip
file?
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