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
27 Dec 22, 2022
17 Sep 19, 2022
85 Dec 30, 2022
48 Dec 20, 2022
261 Jan 09, 2023
2 Mar 14, 2022
18 Sep 02, 2022
0 Oct 11, 2021
28 Sep 16, 2022
29 Dec 24, 2022
1 Feb 09, 2022
[email protected](SZ)">
7 Dec 16, 2021
72 Dec 16, 2022
50 Dec 28, 2022
171 Jan 06, 2023
86 Dec 21, 2022
47 Dec 17, 2022
140 Dec 05, 2022
147 Jan 07, 2023
217 Dec 12, 2022