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Added examples and restructured short sections in the TL;DR section

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Michele Cereda
2023-01-01 19:43:14 +01:00
parent a0d6614b84
commit 06ab981833
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knowledge base/python.md
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@@ -1,11 +1,38 @@
# Python
## String formatting
1. [TL,DR](#tldr)
2. [Web servers](#web-servers)
1. [Flask](#flask)
2. [WSGI server](#wsgi-server)
3. [Further readings](#further-readings)
```python
# f-strings
## TL,DR
```py
# String formatting with f-strings.
f"Hello, {name}. You are {age}."
F"{name.lower()} is funny."
# Make elements in a list unique.
# Keep the resulting list mutable.
unique_list = list(set(redundant_list))
```
Maintenance:
```sh
# Generate a list of the outdated packages.
pip list --outdated
# Upgrade all packages.
pip install --requirement <(pip freeze | sed 's/==/>=/') --upgrade
# Remove orphaned dependencies.
# Requires `pip-autoremove`.
pip-autoremove
# Upgrade the included `pip` executable on Mac OS X.
~/Library/Python/3.8/bin/pip3 install --user --upgrade pip
```
## Web servers
@@ -64,38 +91,31 @@ pip install flask waitress
python hello.py
```
## Maintenance
```sh
# generate a list of all outdated packages
pip list --outdated
# upgrade all packages (oneliner)
pip install --requirement <(pip freeze | sed 's/==/>=/') --upgrade
# remove orphaned dependencies
# after installation of pip-autoremove
pip-autoremove
# upgrade onboard pip on mac os x
pip3 install --user --upgrade pip
echo 'export PATH="${HOME}/Library/Python/3.8/bin:${PATH}"' >> ${HOME}/.zprofile
```
## Further readings
- [flask at first run: do not use the development server in a production environment]
- [f-strings]
- [data types]
- [flask example with POST]
- [multi-value query parameters with flask]
- [How To Update All Python Packages]
- [invl/pip-autoremove]
- [Data types]
- [F-strings
- [How to filter list elements in Python]
- [Logging]
- [Flask at first run: do not use the development server in a production environment]
- [Flask example with POST]
- [Multi-value query parameters with Flask]
- [*args and **kwargs in Python]
- [An intro to threading in Python]
- [ThreadPoolExecutor in Python: the complete guide]
<!-- external references -->
[*args and **kwargs in python]: https://www.geeksforgeeks.org/args-kwargs-python/
[an intro to threading in python]: https://realpython.com/intro-to-python-threading/
[data types]: https://www.w3schools.com/python/python_datatypes.asp
[f-strings]: https://realpython.com/python-f-strings/
[flask at first run: do not use the development server in a production environment]: https://stackoverflow.com/questions/51025893/flask-at-first-run-do-not-use-the-development-server-in-a-production-environmen#54381386
[flask example with POST]: https://stackoverflow.com/questions/22947905/flask-example-with-post#53725861
[how to update all python packages]: https://www.activestate.com/resources/quick-reads/how-to-update-all-python-packages/
[multi-value query parameters with flask]: https://dev.to/svencowart/multi-value-query-parameters-with-flask-3a92
[invl/pip-autoremove]: https://github.com/invl/pip-autoremove
[logging]: https://docs.python.org/3/howto/logging.html
[multi-value query parameters with flask]: https://dev.to/svencowart/multi-value-query-parameters-with-flask-3a92
[threadpoolexecutor in python: the complete guide]: https://superfastpython.com/threadpoolexecutor-in-python/
[how to filter list elements in python]: https://www.pythontutorial.net/python-basics/python-filter-list/