Paker
Paker is module for importing Python packages/modules from dictionaries and JSON formatted documents. It was inspired by httpimporter.
Important: Since v0.6.0 paker supports importing .pyd and .dll modules directly from memory. This was achieved by using _memimporter from py2exe project. Importing .so files on Linux still requires writing them to disk.
Installation
From PyPI
pip install paker -U
From source
git clone https://github.com/desty2k/paker.git
cd paker
pip install .
Usage
In Python script
You can import Python modules directly from string, dict or bytes (without disk IO).
import paker
import logging
MODULE = {"somemodule": {"type": "module", "extension": "py", "code": "fun = lambda x: x**2"}}
logging.basicConfig(level=logging.NOTSET)
if __name__ == '__main__':
with paker.loads(MODULE) as loader:
# somemodule will be available only in this context
from somemodule import fun
assert fun(2), 4
assert fun(5), 25
print("6**2 is {}".format(fun(6)))
print("It works!")
To import modules from .json files use load function. In this example paker will serialize and import mss package.
import paker
import logging
file = "mss.json"
logging.basicConfig(level=logging.NOTSET)
# install mss using `pip install mss`
# serialize module
with open(file, "w+") as f:
paker.dump("mss", f, indent=4)
# now you can uninstall mss using `pip uninstall mss -y`
# load package back from dump file
with open(file, "r") as f:
loader = paker.load(f)
import mss
with mss.mss() as sct:
sct.shot()
# remove loader and clean the cache
loader.unload()
try:
# this will throw error
import mss
except ImportError:
print("mss unloaded successfully!")
CLI
Paker can also work as a standalone script. To dump module to JSON dict use dump command:
paker dump mss
To recreate module from JSON dict use load:
paker load mss.json
Show all modules and packages in .json file
paker list mss.json
How it works
When importing modules or packages Python iterates over importers in sys.meta_path and calls find_module method on each object. If the importer returns self, it means that the module can be imported and None means that importer did not find searched package. If any importer has confirmed the ability to import module, Python executes another method on it - load_module. Paker implements its own importer called jsonimporter, which instead of searching for modules in directories, looks for them in Python dictionaries
To dump module or package to JSON document, Paker recursively iterates over modules and creates dict with code and type of each module and submodules if object is package.
2 Mar 15, 2022
962 Dec 23, 2022
89 Dec 13, 2022
185 Dec 29, 2022
110 Dec 20, 2022
69 Jan 26, 2021
1 Dec 17, 2021
18 Aug 4, 2022
75 Dec 16, 2022
3 Aug 03, 2022
1.5k Jan 02, 2023
649 Dec 27, 2022
10 Jul 14, 2022
1.1k Nov 14, 2022
146 Dec 31, 2022
109 Dec 28, 2022
29 Sep 20, 2022
12 Jul 07, 2022
0 Oct 17, 2022
28 Nov 06, 2022
4 Oct 27, 2022
52 Oct 31, 2022
47 Sep 20, 2022
12 Sep 26, 2022
3 Sep 30, 2022
269 Dec 21, 2022
82 Dec 11, 2022
27 Dec 23, 2022