A backport of the Python 3 importlib package.
Project description
A complete backport to 2.7 (and 3.x) of the importlib package from Python 3. Compatibility is intended to match only the latest public, non-deprecated importlib API.
Note: This project is not yet released and the code base may be unstable. Currently the importlib tests all pass, but a few things remain to be done before the initial release.
Note: Currently there is a problem under Python 3.2 with loading modules from .pyc files. However, this does not affect 2.7, which is the main target for importlib2.
Usage
You may use importlib2 as you would any other module. You may also call importlib2.hook.install() to make Python use importlib2 for the import system.
API
Building and Installing
Use setup.py/pip/setuptools like normal.
Extra Files
importlib2 adds the following files to importlib (relative to package’s root directory):
_fixers/ - the code used to monkeypatch importlib2 at run-time
- _version/__init__.py - contains the importlib2 version
information
- _version/ORIGINAL_PY_VERSION - the major/minor/micro version of the
cpython from which importlib2 was most recently pulled
- _version/ORIGINAL_PY_REVISION - the revision of the cpython repo
from which importlib2 was most recently pulled
- _version/RELEASE - the importlib2 release identifier relative
to ORIGINAL_PY_VERSION (an increasing integer) from which importlib2 was most recently pulled
- hook.py - the module used to set importlib2 as Python’s import
system (not in the clean-cpython branch)
Tools
Each is located in the project root.
pull-cpython.py (only in the clean-cpython branch)
tests/ (run python -m tests)
Main Branches
- clean-cpython - the relevant importlib files pulled from a cpython
repo
- standalone-3.4 - the files fixed so that the test suite passes
using the Python interpreter built from the same cpython repo
default - the files fixed to work under 2.7
Releases are made from the default branch.
Merging from cpython
from the clean-cpython branch run pull-cpython.py
commit the change
change to the standalone-3.4 branch
merge from the clean-cpython branch
make any changes necessary to get the test suite to pass using the same cpython from which the files were most recently pulled
commit the changes (if any)
change to default
merge from the standalone-3.4 branch
make any changes necessary to get the test suite to pass using Python 2.7 (and 3.2)
commit the changes (if any)
XXX Automate this process?
Releasing
<TBD>
TODO
<TBD>
