TIL (Today I Learned)
The TIL series of articles contains very short articles documenting something I learned “today”.
Today I learned how to set different thousands separators using string formatting.
Today I learned that the module builtins grows dynamically in the REPL.
Today I learned you can use uv to install CLI tools with extra dependencies.
Today I learned how to use uv to escape uv and go back to using venv and pip for a given project.
Today I learned how to detect collisions between circles and rectangles with 100% accuracy.
Today I learned how to quickly switch back and forth between two different git branches.
Today I learned how to publish a Python package to PyPI with uv.
Today I learned that I can use the percent sign to run commands from inside Jupyter notebooks.
Today I learned that Python has nested Easter eggs in the standard library.
Today I learned that Polars allows non-strict vertical concatenation of dataframes with the parameter how="vertical".
Today I learned how to create standalone Python scripts with uv.
Today I learned how I can use the method 'groupdict' from a regex match to get a dictionary with all named groups.
Today I learned that if you suppress the exception KeyboardInterrupt then your program is still interrupted but it doesn't display a traceback.
Today I learned that the hash of an integer is the integer itself, except for -1. The hash of -1 is -2.
Today I learned how to allow my custom objects to be unpacked into keyword arguments like '**kwargs'.
Today I learned how to use the Polars function pl.date_range to create date sequences with calendar-aware intervals between dates.
Today I learned how to use shell scripting to activate my virtual environment automatically when I change directories.
Today I learned about 5 useful pytest options that let me control what tests to run with respect to failing tests.
