https://nalar.dev/tags/command-line/ Recent content in Command Line on Nalar Hugo en-us Thu, 03 Sep 2026 00:00:00 +0700 https://nalar.dev/parse-and-render-shell-arguments-safely-with-python-shlex/ Thu, 03 Sep 2026 00:00:00 +0700 https://nalar.dev/parse-and-render-shell-arguments-safely-with-python-shlex/ <p>Command-line text looks deceptively simple. Splitting on spaces works until an argument contains whitespace. Concatenating strings works until a filename contains shell metacharacters. Logging a list of arguments works, but the result may be difficult for a human to copy and inspect.</p> <p>Python&rsquo;s <code>shlex</code> module handles a useful middle ground: shell-like lexical analysis for Unix-style command text. Its <code>split()</code>, <code>quote()</code>, and <code>join()</code> helpers let programs move deliberately between a string representation and a sequence of argument tokens.</p>