Web Reference: Dec 11, 2025 · I would like to automate a task of running an application repeatedly using Python's subprocess. The application is called ltx, and I need to run it with the -h argument, for example: 2 days ago · The recommended approach to invoking subprocesses is to use the run() function for all use cases it can handle. For more advanced use cases, the underlying Popen interface can be used directly. Run the command described by args. Wait for command to complete, then return a CompletedProcess instance. Jul 22, 2016 · call() doesn't expect a legitimate shell command; it expects to find a path to an actual executable. And calling a standalone cd doesn't achieve anything: the CWD is a process specific variable that ceases to exist once the process exits.
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