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Groups > comp.lang.python > #65028
| From | Peter Otten <__peter__@web.de> |
|---|---|
| Subject | Re: fseek In Compressed Files |
| Date | 2014-01-30 17:21 +0100 |
| Organization | None |
| References | <68316d1a-e52e-48b5-87df-7119f46ebabc@googlegroups.com> <lcdcvv$lbn$2@ger.gmane.org> <lcdpi3$thc$1@ger.gmane.org> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.6152.1391098879.18130.python-list@python.org> (permalink) |
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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fseek In Compressed Files Ayushi Dalmia <ayushidalmia2604@gmail.com> - 2014-01-30 02:50 -0800
Re: fseek In Compressed Files Peter Otten <__peter__@web.de> - 2014-01-30 12:28 +0100
Re:fseek In Compressed Files Dave Angel <davea@davea.name> - 2014-01-30 06:55 -0500
Re: fseek In Compressed Files Ayushi Dalmia <ayushidalmia2604@gmail.com> - 2014-01-30 05:34 -0800
Re: fseek In Compressed Files Chris Angelico <rosuav@gmail.com> - 2014-01-31 00:49 +1100
Re: fseek In Compressed Files Dave Angel <davea@davea.name> - 2014-02-03 15:57 -0500
Re: fseek In Compressed Files Ayushi Dalmia <ayushidalmia2604@gmail.com> - 2014-02-04 04:39 -0800
Re: fseek In Compressed Files Serhiy Storchaka <storchaka@gmail.com> - 2014-01-30 17:02 +0200
Re: fseek In Compressed Files Ayushi Dalmia <ayushidalmia2604@gmail.com> - 2014-01-30 07:37 -0800
Re: fseek In Compressed Files Dave Angel <davea@davea.name> - 2014-01-30 13:46 -0500
Re: fseek In Compressed Files Ayushi Dalmia <ayushidalmia2604@gmail.com> - 2014-01-31 21:52 -0800
Re: fseek In Compressed Files Dave Angel <davea@davea.name> - 2014-02-01 04:38 -0500
Re: fseek In Compressed Files Peter Otten <__peter__@web.de> - 2014-01-30 17:21 +0100
Re: fseek In Compressed Files Ayushi Dalmia <ayushidalmia2604@gmail.com> - 2014-01-31 21:50 -0800
Re: fseek In Compressed Files Serhiy Storchaka <storchaka@gmail.com> - 2014-02-03 20:32 +0200
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