https://nalar.dev/tags/contextlib/ Recent content in Contextlib on Nalar Hugo en-us Tue, 08 Sep 2026 00:00:00 +0700 https://nalar.dev/change-working-directories-safely-with-contextlib-chdir/ Tue, 08 Sep 2026 00:00:00 +0700 https://nalar.dev/change-working-directories-safely-with-contextlib-chdir/ <p>Changing the current working directory is one of those operations that looks local in code but is global in effect. I still see scripts that call <code>os.chdir()</code>, do some work, and then try to remember where they started.</p> <p>Python 3.11 added <code>contextlib.chdir()</code>, which makes the restore step much cleaner. To be fair, though, a context manager does not make changing the working directory concurrency-safe. The important part is understanding what state is being changed and how long that state stays changed.</p>