Internal development process#
In this chapter, we will discuss how to developer trading-strategy and trade-executor Python packages.
Installation for local development#
See respective READMEs in Github repositories.
To run tests you need to have a Trading Strategy API key. Tests use the production server.
poetry shell export TRADING_STRATEGY_API_KEY="secret-token:tradingstrategy-xxx" pytest
Tests are very slow.
By default, the test run will cache any downloaded blobs. You can force the redownload with:
CLEAR_CACHES=true pytest --log-cli-level=debug -k test_grouped_liquidity
rm -rf /tmp/trading-strategy-tests
Updating documentation notebooks#
The example notebooks must be run using jupyter notebook server before committing to the documentation, as otherwise Plotly figures won’t display.
Visual Studio Code notebook output gives you Data type cannot be displayed: application/vnd.plotly.v1+json error if added via nbsphinx
PyCharm has internal bugs and fails to finish running notebooks
First set up the development environment:
git clone [email protected]:tradingstrategy-ai/docs.git co docs make \ update-git-submodules \ poetry-install \ pip-force-install-deps \ install-furo \ rebuild-furo \ clean-autosummary \ clean \ html
This will create build/html/index.html which you can open in your web browser
And now you can browse the documentation locally using file:// protcol.
Then to rerun and rerender a Jupyter notebook locally.
First start the notebook browser locally in Poetry environment:
This will spawn a Jupyter server and open a Jupyter notebook user interface in your web browser. You can later close this with CTRL + C.
Find a notebook that you want to rerender.
Choose clear output. Run it.
Manually inspect that the notebook complete and there are no errors
All figures are rendered
The last cell with print(“Ok”)
= There are no excessive warnings (some warnings are ok)
Then commit new notebook
Create a branch
Push in refreshed ipynb file
Open a PR
Because how Sphinx automsummary works, it may update files under source tree, so be careful when doing a full regeneration of documentation.
Terminal IPython and debugging with ipdb#
You might want to run notebooks in a terminal using
ipython command e.g. for better debugging facilities.
You can run example notebooks in a terminal after git checkout and poetry install:
This is especially useful if you want to debug library code with ipdb.
The default cache location for the downloaded datasets is ~/.cache/tradingstrategy.
ls -lha ~/.cache/tradingstrategy
total 56M drwxr-xr-x 5 moo staff 160 Jul 19 23:14 ./ drwx------ 14 moo staff 448 Jul 18 15:49 ../ -rw-r--r-- 1 moo staff 49M Jul 19 23:14 candles-24h.feather -rw-r--r-- 1 moo staff 95K Jul 18 15:49 exchange-universe.json -rw-r--r-- 1 moo staff 6.3M Jul 19 21:57 pair-universe.json.zstd
You can clear this out manually from the UNIX shell
rm -rf ~/.cache/tradingstrategy
Making a release#
poetry build poetry publish
Use pytest-monitor for profiling memory usage. We need to ensure large datasets do not cause issues on low-memory environments like WebAsssembly in web browsers.