Python et les fichiers zip
**************************


Il existe dans python le module **zipfile** pour gérer les fichiers zip

test de fichier zip
-------------------

.. code-block:: python

	import zipfile

	for filename in [ 'README.txt', 'example.zip', 
	                  'bad_example.zip', 'notthere.zip' ]:
	    print '%20s  %s' % (filename, zipfile.is_zipfile(filename))

::

	$ python zipfile_is_zipfile.py

	          README.txt  False
	         example.zip  True
	     bad_example.zip  False
	        notthere.zip  False

lecture des méta-data
---------------------

.. code-block:: python

	import zipfile

	zf = zipfile.ZipFile('example.zip', 'r')
	print zf.namelist()

::

	$ python zipfile_namelist.py

	['README.txt']

ou

.. code-block:: python

	import datetime
	import zipfile

	def print_info(archive_name):
	    zf = zipfile.ZipFile(archive_name)
	    for info in zf.infolist():
	        print info.filename
	        print '\tComment:\t', info.comment
	        print '\tModified:\t', datetime.datetime(*info.date_time)
	        print '\tSystem:\t\t', info.create_system, '(0 = Windows, 3 = Unix)'
	        print '\tZIP version:\t', info.create_version
	        print '\tCompressed:\t', info.compress_size, 'bytes'
	        print '\tUncompressed:\t', info.file_size, 'bytes'
	        print

	if __name__ == '__main__':
	    print_info('example.zip')

extraire une archive zip
------------------------

.. code-block:: python

	import zipfile

	zf = zipfile.ZipFile('example.zip')
	for filename in [ 'README.txt', 'notthere.txt' ]:
	    try:
	        data = zf.read(filename)
	    except KeyError:
	        print 'ERROR: Did not find %s in zip file' % filename
	    else:
	        print filename, ':'
	        print repr(data)
	    print

::

	$ python zipfile_read.py

	README.txt :
	'The examples for the zipfile module use this file and example.zip as data.\n'

	ERROR: Did not find notthere.txt in zip file

Pour extraire une archive complète

.. code-block:: python

	with zipfile.ZipFile("myfile.zip", "r") as z:
		z.extractall("my_dir")

créer une archive zip
---------------------

.. code-block:: python

	from zipfile_infolist import print_info
	import zipfile

	print 'creating archive'
	zf = zipfile.ZipFile('zipfile_write.zip', mode='w')
	try:
	    print 'adding README.txt'
	    zf.write('README.txt')
	finally:
	    print 'closing'
	    zf.close()

	print
	print_info('zipfile_write.zip')

::

	$ python zipfile_write.py
	creating archive
	adding README.txt
	closing

	README.txt
	        Comment:
	        Modified:       2007-12-16 10:08:50
	        System:         3 (0 = Windows, 3 = Unix)
	        ZIP version:    20
	        Compressed:     75 bytes
	        Uncompressed:   75 bytes

ou plus simple

.. code-block:: python

    myzip = zipfile.ZipFile('test.zip', 'w', zipfile.ZIP_DEFLATED)
    myzip.write(xls_file)
    myzip.close()