Python Bytes: #253 A new Python for you, and for everyone!

<p><strong>Watch the live stream:</strong></p> <a href='https://www.youtube.com/watch?v=mMd1TzdpfZ8' style='font-weight: bold;'>Watch on YouTube</a><br> <br> <p><strong>About the show</strong></p> <p>Special guest: Yael Mintz</p> <p>Sponsored by <strong>us:</strong></p> <ul> <li>Check out the <a href="https://training.talkpython.fm/courses/all"><strong>courses over at Talk Python</strong></a></li> <li>And <a href="https://pythontest.com/pytest-book/"><strong>Brian’s book too</strong></a>!</li> </ul> <p><strong>Michael #1:</strong> <a href="https://github.com/rajasegar/awesome-htmx"><strong>awesome-htmx</strong></a></p> <ul> <li>An awesome list of resources about <strong>htmx</strong> such as articles, posts, videos, talks and more.</li> <li>Good for all sorts of examples and multiple languages</li> <li>We get a few nice shoutouts, thanks</li> </ul> <p><strong>Brian #2:</strong> <a href="https://www.python.org/downloads/release/python-3100/"><strong>Python 3.10 is here !!!!</strong></a> </p> <ul> <li>As of Monday. Of course I have it installed on Mac and Windows. Running like a charm.</li> <li>You can watch the <a href="https://ift.tt/2YrnEhl Party recording</a>. It’s like 3 hours. And starts with hats. Pablo’s is my fav.</li> <li>Also a <a href="https://www.youtube.com/watch?v=JteTO3EE7y0&amp;t=1s">What’s New video</a> which aired before that with Brandt Bucher, Lukasz Llanga ,and Sebastian Ramirez (33 min) <ul> <li>Includes a deep dive into structural pattern matching that I highly recommend.</li> </ul></li> <li>Reminder of new features: <ul> <li><a href="https://www.python.org/dev/peps/pep-0623/">PEP 623</a> -- Deprecate and prepare for the removal of the wstr member in PyUnicodeObject.</li> <li>PEP 604 -- Allow writing union types as X | Y</li> <li><a href="https://www.python.org/dev/peps/pep-0612/">PEP 612</a> -- Parameter Specification Variables</li> <li><a href="https://www.python.org/dev/peps/pep-0626/">PEP 626</a> -- Precise line numbers for debugging and other tools.</li> <li><a href="https://www.python.org/dev/peps/pep-0618/">PEP 618</a> -- Add Optional Length-Checking To zip.</li> <li><a href="https://bugs.python.org/issue12782">bpo-12782</a>: Parenthesized context managers are now officially allowed.</li> <li><a href="https://www.python.org/dev/peps/pep-0632/">PEP 632</a> -- Deprecate distutils module.</li> <li><a href="https://www.python.org/dev/peps/pep-0613/">PEP 613</a> -- Explicit Type Aliases</li> <li><a href="https://www.python.org/dev/peps/pep-0634/">PEP 634</a> -- Structural Pattern Matching: Specification</li> <li><a href="https://www.python.org/dev/peps/pep-0635/">PEP 635</a> -- Structural Pattern Matching: Motivation and Rationale</li> <li><a href="https://www.python.org/dev/peps/pep-0636/">PEP 636</a> -- Structural Pattern Matching: Tutorial</li> <li><a href="https://www.python.org/dev/peps/pep-0644/">PEP 644</a> -- Require OpenSSL 1.1.1 or newer</li> <li><a href="https://www.python.org/dev/peps/pep-0624/">PEP 624</a> -- Remove Py_UNICODE encoder APIs</li> <li><a href="https://www.python.org/dev/peps/pep-0597/">PEP 597</a> -- Add optional EncodingWarning</li> </ul></li> <li>Takeaway I wasn’t expecting: <code>black</code> doesn’t handle Structural Pattern Matching yet. </li> </ul> <p><strong>Yael #3:</strong> <a href="https://github.com/PyCQA/prospector"><strong>Prospector</strong></a> <a href="https://github.com/PyCQA/prospectors">(almost)</a> <a href="https://github.com/PyCQA/prospector">All Python analysis tools together</a></p> <ul> <li>Instead of running pylint, pycodestyle, mccabe and other separately, prospector allows you to bundle them all together </li> <li>Includes the common <a href="https://www.pylint.org/">Pylint</a> and <a href="https://github.com/PyCQA/pydocstyle">Pydocstyle / Pep257</a>, but also some other less common goodies, such as <a href="https://github.com/PyCQA/mccabe">Mccabe</a>, <a href="https://github.com/landscapeio/dodgy">Dodgy</a>, <a href="https://github.com/jendrikseipp/vulture">Vulture</a>, <a href="https://github.com/PyCQA/bandit">Bandit</a>, <a href="https://github.com/regebro/pyroma">Pyroma</a> and many others </li> <li>Relatively easy configuration that supports profiles, for different cases</li> <li>Built-in support for celery, Flask and Django frameworks</li> <li><a href="https://soshace.com/how-to-use-prospector-for-python-static-code-analysis/">https://soshace.com/how-to-use-prospector-for-python-static-code-analysis/</a></li> </ul> <p><strong>Michael #4:</strong> <a href="https://twitter.com/__aviperl__/status/1442542251817652228"><strong>Rich Pandas DataFrames</strong></a></p> <ul> <li>via Avi Perl, by Khuyen Tran</li> <li>Create animated and pretty Pandas Dataframe or Pandas Series (in the terminal, using Rich)</li> <li>I just had Will over on Talk Python last week BTW: <a href="https://talkpython.fm/episodes/show/336/terminal-magic-with-rich-and-textual"><strong>Terminal magic with Rich and Textual</strong></a></li> <li>Can limit rows, control the animation speed, show head or tail, go “full screen” with clear, etc.</li> <li>Example:</li> </ul> <pre><code> from sklearn.datasets import fetch_openml from rich_dataframe import prettify speed_dating = fetch_openml(name='SpeedDating', version=1)['frame'] table = prettify(speed_dating) </code></pre> <p><strong>Brian #5:</strong> <strong>Union types, baby!</strong></p> <ul> <li>From Python 3.10: “<a href="https://www.python.org/dev/peps/pep-0604/">PEP 604</a> -- Allow writing union types as X | Y”</li> <li>Use as possibly not intended, to avoid Optional:</li> </ul> <pre><code> def foo(x: str | None = None) -&gt; None: pass </code></pre> <ul> <li>3.9 example:</li> </ul> <pre><code> from typing import Optional def foo(x: Optional[str] = None) -&gt; None: pass </code></pre> <ul> <li>But here’s the issue. I need to support Python 3.9 at least, and probably early, what should I do?</li> <li>For 3.7 and above, you can use <code>from __future__ import annotations</code>.</li> <li>And of course Anthony Sottile worked this into <code>pyupgrade</code> and Adam Johnson wrote about it: <ul> <li><a href="https://adamj.eu/tech/2021/05/21/python-type-hints-how-to-upgrade-syntax-with-pyupgrade/">Python Type Hints - How to Upgrade Syntax with pyupgrade</a></li> </ul></li> <li>This article covers: <ul> <li><a href="https://www.python.org/dev/peps/pep-0585/">PEP 585</a> added generic syntax to builtin types. This allows us to write e.g. <code>list[int]</code> instead of using <code>typing.List[int]</code>.</li> <li><a href="https://www.python.org/dev/peps/pep-0604/">PEP 604</a> added the <code>|</code> operator as union syntax. This allows us to write e.g. <code>int | str</code> instead of <code>typing.Union[int, str]</code>, and <code>int | None</code> instead of <code>typing.Optional[int]</code>.</li> <li>How to use these. What they look like. And how to use <code>pyupgrade</code> to just convert your code for you if you’ve already written it the old way. Awesome.</li> </ul></li> </ul> <p><strong>Yael #6:</strong> <a href="https://dev.to/akaihola/improving-python-code-incrementally-3f7a"><strong>Make your code darker - Improving Python code incrementally</strong></a></p> <ul> <li>The idea behind <a href="https://pypi.org/project/darker">Darker</a> is to reformat code using <a href="https://pypi.org/project/black">Black</a> (and optionally <a href="https://pypi.org/project/isort">isort</a>), but only apply new formatting to regions which have been modified by the developer</li> <li>Instead of having one huge PR, darker allows you to reformat the code gradually, when you're touching the code for other reasons.. </li> <li>Every modified line, will be black formatted</li> <li>Once added to <a href="https://github.com/akaihola/darker#using-as-a-pre-commit-hook">Git pre-commit-hook</a>, or added to <a href="https://github.com/akaihola/darker#pycharmintellij-idea">PyCharm</a> <a href="https://github.com/akaihola/darker#pycharmintellij-idea"><em>*</em>*</a>/ <a href="https://github.com/akaihola/darker#visual-studio-code">VScode</a> the formatting will happen automatically</li> </ul> <p><strong>Extras</strong></p> <p>Brian:</p> <ul> <li>I got a couple PRs accepted into pytest. So that’s fun: <ul> <li><a href="https://github.com/pytest-dev/pytest/pull/9133">9133: Add a deselected parameter to assert_outcomes()</a></li> <li><a href="https://github.com/pytest-dev/pytest/pull/9134">9134: Add a pythonpath setting to allow paths to be added to sys.path</a></li> <li>I’ve tested, provided feedback, written about, and submitted issues to the project before. I’ve even contributed some test code. But these are the first source code contributions.</li> <li>It was a cool experience. Great team there at pytest.</li> </ul></li> </ul> <p>Michael:</p> <ul> <li>New htmx course: <a href="https://ift.tt/3Ft4KqM + Flask: Modern Python Web Apps, Hold the JavaScript</strong></a></li> <li><a href="https://pypi.org/project/auto-optional/"><strong>auto-optional</strong></a>: Due to the comments on the show I remembered to add support for <code>Union[X, None]</code> and python 10’s <code>X | None</code> syntax.</li> <li><a href="https://nedbatchelder.com/blog/202110/coverage_60.html">Coverage 6.0 released</a></li> <li><a href="https://docs.djangoproject.com/en/3.2/releases/3.2.8/">Django 3.2.8 released</a></li> </ul> <p>Yael:</p> <ul> <li><a href="https://www.manning.com/books/data-oriented-programming">data-oriented-programming</a> - an innovative approach to coding without OOP, with an emphasis on code and data separation, which simplifies state management and eases concurrency</li> <li>Help us to make <a href="https://github.com/hiredscorelabs/cornell">Cornell</a> awesome 🙂 - contributors are warmly welcomed</li> </ul> <p><strong>Joke:</strong> <a href="https://geek-and-poke.com/geekandpoke/2021/1/24/pair-captchaing"><strong>Pair CAPTCHAing</strong></a></p>

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