[Python-checkins] r61999 - python/trunk/Doc/library/gzip.rst
georg.brandl
python-checkins at python.org
Fri Mar 28 09:06:56 CET 2008
Author: georg.brandl
Date: Fri Mar 28 09:06:56 2008
New Revision: 61999
Modified:
python/trunk/Doc/library/gzip.rst
Log:
#2406: add examples to gzip docs.
Modified: python/trunk/Doc/library/gzip.rst
==============================================================================
--- python/trunk/Doc/library/gzip.rst (original)
+++ python/trunk/Doc/library/gzip.rst Fri Mar 28 09:06:56 2008
@@ -1,19 +1,22 @@
-
:mod:`gzip` --- Support for :program:`gzip` files
=================================================
.. module:: gzip
:synopsis: Interfaces for gzip compression and decompression using file objects.
+This module provides a simple interface to compress and decompress files just
+like the GNU programs :program:`gzip` and :program:`gunzip` would.
+
+The data compression is provided by the :mod:``zlib`` module.
-The data compression provided by the ``zlib`` module is compatible with that
-used by the GNU compression program :program:`gzip`. Accordingly, the
-:mod:`gzip` module provides the :class:`GzipFile` class to read and write
+The :mod:`gzip` module provides the :class:`GzipFile` class which is modeled
+after Python's File Object. The :class:`GzipFile` class reads and writes
:program:`gzip`\ -format files, automatically compressing or decompressing the
-data so it looks like an ordinary file object. Note that additional file
-formats which can be decompressed by the :program:`gzip` and :program:`gunzip`
-programs, such as those produced by :program:`compress` and :program:`pack`,
-are not supported by this module.
+data so that it looks like an ordinary file object.
+
+Note that additional file formats which can be decompressed by the
+:program:`gzip` and :program:`gunzip` programs, such as those produced by
+:program:`compress` and :program:`pack`, are not supported by this module.
For other archive formats, see the :mod:`bz2`, :mod:`zipfile`, and
:mod:`tarfile` modules.
@@ -63,6 +66,36 @@
*compresslevel* defaults to ``9``.
+.. _gzip-usage-examples:
+
+Examples of usage
+-----------------
+
+Example of how to read a compressed file::
+
+ import gzip
+ f = gzip.open('/home/joe/file.txt.gz', 'rb')
+ file_content = f.read()
+ f.close()
+
+Example of how to create a compressed GZIP file::
+
+ import gzip
+ content = "Lots of content here"
+ f = gzip.open('/home/joe/file.txt.gz', 'wb')
+ f.write(content)
+ f.close()
+
+Example of how to GZIP compress an existing file::
+
+ import gzip
+ f_in = open('/home/joe/file.txt', 'rb')
+ f_out = gzip.open('/home/joe/file.txt.gz', 'wb')
+ f_out.writelines(f_in)
+ f_out.close()
+ f_in.close()
+
+
.. seealso::
Module :mod:`zlib`
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