Command Line

Parse and Render Shell Arguments Safely with Python shlex

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. Python’s shlex module handles a useful middle ground: shell-like lexical analysis for Unix-style command text. Its split(), quote(), and join() helpers let programs move deliberately between a string representation and a sequence of argument tokens.