{"id":708,"library":"setproctitle","title":"Set Process Title","description":"The `setproctitle` module is a C extension for Python that allows a process to change its title, which is displayed by system tools like `ps`, `top`, or `MacOS Activity Monitor`. This is particularly useful in multi-process systems (e.g., master/forked children) to identify the specific task each process is handling. The current version is 1.3.7, and it has a stable release cadence, with the last update in September 2025.","status":"active","version":"1.3.7","language":"python","source_language":"en","source_url":"https://github.com/dvarrazzo/py-setproctitle","tags":["process","title","monitoring","daemon","ps","top"],"install":[{"cmd":"pip install setproctitle","lang":"bash","label":"Install with pip"}],"dependencies":[{"reason":"setproctitle is a C extension and requires a C compiler to build.","package":"C compiler","optional":false},{"reason":"Requires Python development support (e.g., `python-dev` or `python3-dev` on Linux) to build the C extension.","package":"Python development headers","optional":false}],"imports":[{"note":"While 'import setproctitle' works, directly importing 'setproctitle' (the function) is common for brevity and clarity when only this function is needed.","wrong":"import setproctitle; setproctitle.setproctitle()","symbol":"setproctitle","correct":"from setproctitle import setproctitle"},{"symbol":"getproctitle","correct":"from setproctitle import getproctitle"},{"symbol":"setthreadtitle","correct":"from setproctitle import setthreadtitle"},{"symbol":"getthreadtitle","correct":"from setproctitle import getthreadtitle"}],"quickstart":{"code":"import setproctitle\nimport time\nimport os\n\noriginal_title = setproctitle.getproctitle()\nprint(f\"Original process title: {original_title}\")\n\nnew_title = f\"my_worker_process_id_{os.getpid()}\"\nsetproctitle.setproctitle(new_title)\nprint(f\"New process title: {setproctitle.getproctitle()}\")\n\n# Simulate some work\ntime.sleep(5)\n\nsetproctitle.setproctitle(original_title)\nprint(f\"Restored original process title: {setproctitle.getproctitle()}\")","lang":"python","description":"This quickstart demonstrates how to change the current process's title using `setproctitle.setproctitle()` and retrieve it with `setproctitle.getproctitle()`. It also shows how to restore the original title."},"warnings":[{"fix":"Ensure `import setproctitle` and initial calls to `setproctitle()` or `getproctitle()` occur before any significant environment variable manipulation.","message":"Import and use `setproctitle` early in your program's lifetime. Code that modifies environment variables after `setproctitle` is initialized may interfere with its proper functioning.","severity":"gotcha","affected_versions":"All versions"},{"fix":"To prevent `/proc/PID/environ` from being clobbered, set the `SPT_NOENV` environment variable to any non-empty value before running your Python process (e.g., `export SPT_NOENV=1`). Note that this will limit the maximum length for the process title to the length of the original command line.","message":"On many platforms, setting the process title may overwrite the `environ` memory area, potentially clobbering the content of `/proc/PID/environ`. While `os.environ` within Python will still work as expected, external tools reading `/proc/PID/environ` might see broken data.","severity":"gotcha","affected_versions":"All versions"},{"fix":"Test your application on all target operating systems and kernel versions to confirm the expected behavior of process title changes. On Windows, the module creates a Named Object, which can be read by tools like Process Explorer, as there is no direct way to change the visible process string.","message":"The ability to change process titles is highly platform-dependent. While `setproctitle` is designed for cross-platform compatibility, its behavior and what is visible may vary significantly.","severity":"gotcha","affected_versions":"All versions"},{"fix":"Ensure you are using `setproctitle` version 1.1 or newer for Python 3 compatibility. The current version (1.3.7) fully supports Python 3.","message":"Older versions of setproctitle (prior to 1.1) did not officially support Python 3.","severity":"deprecated","affected_versions":"< 1.1"}],"env_vars":null,"last_verified":"2026-05-12T18:02:45.298Z","next_check":"2026-06-26T00:00:00.000Z","problems":[{"fix":"Install the Python development package for your system (e.g., `sudo apt-get install python3-dev` on Debian/Ubuntu, `sudo yum install python3-devel` on RHEL/CentOS/Fedora).","cause":"The Python development headers are missing, which are required to compile C extensions like setproctitle.","error":"fatal error: Python.h: No such file or directory"},{"fix":"Install the package using pip: `pip install setproctitle`.","cause":"The `setproctitle` package is not installed in the current Python environment or the environment is not activated.","error":"ModuleNotFoundError: No module named 'setproctitle'"},{"fix":"Ensure essential build tools are installed (e.g., `sudo apt-get install build-essential` on Debian/Ubuntu) and Python development headers are present (see the 'Python.h' error fix).","cause":"The C compiler (gcc) encountered an error during the compilation of the setproctitle C extension, often due to missing build tools or Python development headers.","error":"error: command 'gcc' failed with exit status 1"},{"fix":"Call the `setproctitle` function from within the module: `setproctitle.setproctitle(\"new_title\")`.","cause":"The user attempted to call the `setproctitle` module directly as a function instead of calling its specific `setproctitle()` method within the module.","error":"TypeError: 'module' object is not callable"}],"ecosystem":"pypi","meta_description":null,"install_score":100,"install_tag":"verified","quickstart_score":80,"quickstart_tag":"verified","pypi_latest":"1.3.7","install_checks":{"last_tested":"2026-05-12","tag":"verified","tag_description":"installs cleanly on critical runtimes, fast import, recently 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