PyDev.Debugger
jurigged
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PyDev.Debugger | jurigged | |
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2 | 15 | |
409 | 1,014 | |
- | - | |
7.0 | 4.8 | |
6 days ago | 9 days ago | |
Python | Python | |
Eclipse Public License 1.0 | MIT License |
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PyDev.Debugger
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Why is debugging so difficult in Docker containers ?
[1] https://github.com/fabioz/PyDev.Debugger/
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Reloadr – Hot code reloading tool for Python
Ha, I'm just working on integrating the `pydev.debugger` code reloading into `debugpy` (so that the code reloading from the PyDev debugger will be available for Python-VSCode debugger users too).
The in-memory reloading (which may be seen at: https://github.com/fabioz/PyDev.Debugger/blob/main/_pydevd_b...) unfortunately doesn't work all the time (fixing the references at runtime in Python is difficult), but it works well enough for the cases where you have a simple function and change it (that file does explain some of the issues that the reloading faces).
One major issue is that after doing the reload, you need to get out of the function and then back into it to see the difference -- so, if you're stopped in the function in a breakpoint, it's not possible to simply drop the function and restart it as Python itself doesn't support that... maybe that's a good idea for a PEP ;)
Anyways, when it works, it's pretty nice in that you don't have to restart your whole debug session to see changes (the other approach, which webservers use in general is just restart the whole process, so, for instance, Django has an initial process just monitoring for changes and a 2nd process which is actually serving requests which is restarted when something changes -- not as good if you have a heavy startup or are working with something where you have to click through multiple things to get to the state which you want).
jurigged
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[D] Yann LeCun's Hot Take about programming languages for ML
If that interests you, I made a package called jurigged that basically does autoreload but asynchronously on Python in general (i.e. you can write jurigged script.py instead of python script.py; it works in a separate thread and can also work in notebooks). It's more surgical than what the notebook does in that it only hot swaps code in changed functions and does not re-execute anything else. This feature is cool too, IMO.
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Debugging Lisp: in CL we can resume a program from any point in the stack
Some of the basic hot-loading features can probably be approximated in Python. Here's some from my bookmarks(i've not tried them personally)
- https://github.com/breuleux/jurigged
- https://github.com/reloadware/reloadium
I would imagine lisp can do this on a whole different level. Emacs seems like a testament to that. Basically the entire editor feels like eval()
- So you're using a weird language
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Reloadium – Hot Reloading for Python (a.k.a. Edit and Continue)
I've been using jurigged [0] for hot code reloading which is great. It works by replacing code objects in place at the function level which naturally handles many cases like applying to existing objects, avoiding loading a module multiple times, etc. As others noted the actual source of this one is not there so it's hard to know what it's doing. The published package contains a binary shared library so I suppose it's written as a CPython extension.
[0] https://github.com/breuleux/jurigged
- jurigged - Hot reloading for Python
What are some alternatives?
ipython - Official repository for IPython itself. Other repos in the IPython organization contain things like the website, documentation builds, etc.
reloading - Change Python code while it's running without losing state
ipdb - Integration of IPython pdb
reloadium - Hot Reloading and Profiling for Python
PythonHotswap - Hotswap Python functions. And persistence of runtime.
watchfiles - Simple, modern and fast file watching and code reload in python.
reloadr - Hot code reloading tool for Python
pyqtboiler - PyQt application boilerplate for rapid development