file open from nested zip file archive.
Project description
zip_open open file from nested zip file archive.
If you use static file like as ‘data.zip’ and open this from your python code, Your program will become like open(os.path.join(os.path.dirname(__file__), 'data.zip')). But if your packages are packed into packages.zip file (zipped-egg, or cases to gather in one file on Google App Engine matter), your code doesn’t work fine.
In this situation, the file path of data.zip becomes /path/to/packages.zip/data.zip, then your program can’t open the data.zip file.
zip_open package solves this problem.
Features
Open file from nested zip archive file path/name.
Open file from nested zip archive file-like-object.
Using sample1: open the file from zip file
packages1.zip is:
packages1.zip + file1.txt
Open file1.txt:
>>> from zip_open import zopen >>> fobj = zopen('packages1.zip/file1.txt') >>> data = fobj.read() >>> print(data) I am file1.txt, ok.
You can specifiy zopen subpath args:
>>> fobj = zopen('packages1.zip', 'file1.txt') >>> print(fobj.read()) I am file1.txt, ok.
These code samples equivalent to below code:
>>> from zipfile import ZipFile >>> zipobj = ZipFile('packages1.zip') >>> data = zipobj.read('file1.txt') >>> print(data) I am file1.txt, ok.
Using sample2: open the file from nested zip file
packages2.zip is:
packages2.zip + data2.zip + file2.txt
Open file2.txt:
>>> from zip_open import zopen >>> fobj = zopen('packages2.zip/data2.zip/file2.txt') >>> print(fobj.read()) I am file2.txt, ok.
If you want to open from file-like-object, you can call:
>>> zip_fileobj = open('packages2.zip', 'rb') >>> fobj = zopen(zip_fileobj, 'data2.zip/file2.txt') >>> print(fobj.read()) I am file2.txt, ok.
then you also call:
>>> from StringIO import StringIO >>> zip_payload = open('packages2.zip', 'rb').read() >>> zip_fileobj = StringIO(zip_payload) >>> fobj = zopen(zip_fileobj, 'data2.zip/file2.txt') >>> print(fobj.read()) I am file2.txt, ok.
Using sample3: open the file included in package oneself
packages3.zip is:
packages3.zip + foo.py + file1.txt + data3.zip + file3.txt
foo.py:
import os from zip_open import zopen def loader(filename): fobj = zopen(os.path.join(os.path.dirname(__file__), filename)) return fobj
execute loader() from interactive shell:
>>> import sys >>> sys.path.insert(0, 'packages3.zip') >>> import foo >>> fobj = foo.loader('file1.txt') >>> print(fobj.read()) I am file1.txt, ok. >>> fobj = foo.loader('data3.zip/file3.txt') >>> print(fobj.read()) I am file3.txt, ok.
Requirements and dependencies
Requirement: Python 2.4 or later
Dependency: Nothing.
ToDo
Add tar.gz file support.
Add using sample document for egg archive.
Support Python3
Add module import feature.
History
0.2.1 (Unreleased)
fixed: test broken (open file as binary)
use distutils.core.setup if no setuptools.
0.2.0 (2011-11-29)
Change license from PSL to Apache License 2.0
Add feature: open from file-like-object.
0.1.0 (2010-7-19)
first release
Project details
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