Set Process Title

1.3.7 verified Tue May 12 auth: no python install: verified quickstart: verified

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.

pip install setproctitle

Common errors

error fatal error: Python.h: No such file or directory ↓

cause The Python development headers are missing, which are required to compile C extensions like setproctitle.

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).

error ModuleNotFoundError: No module named 'setproctitle' ↓

cause The `setproctitle` package is not installed in the current Python environment or the environment is not activated.

fix

Install the package using pip: pip install setproctitle.

error error: command 'gcc' failed with exit status 1 ↓

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.

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).

error TypeError: 'module' object is not callable ↓

cause The user attempted to call the `setproctitle` module directly as a function instead of calling its specific `setproctitle()` method within the module.

fix

Call the setproctitle function from within the module: setproctitle.setproctitle("new_title").

Warnings

gotcha 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. ↓

fix Ensure `import setproctitle` and initial calls to `setproctitle()` or `getproctitle()` occur before any significant environment variable manipulation.

gotcha 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. ↓

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.

gotcha 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. ↓

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.

deprecated Older versions of setproctitle (prior to 1.1) did not officially support Python 3. ↓

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.

Install compatibility verified last tested: 2026-05-12

python os / libc status wheel install import disk

3.10 alpine (musl) wheel - 0.01s 17.9M

3.10 alpine (musl) - - 0.02s 17.9M

3.10 slim (glibc) wheel 1.6s 0.01s 18M

3.10 slim (glibc) - - 0.01s 18M

3.11 alpine (musl) wheel - 0.03s 19.7M

3.11 alpine (musl) - - 0.04s 19.7M

3.11 slim (glibc) wheel 1.6s 0.03s 20M

3.11 slim (glibc) - - 0.03s 20M

3.12 alpine (musl) wheel - 0.02s 11.6M

3.12 alpine (musl) - - 0.03s 11.6M

3.12 slim (glibc) wheel 1.6s 0.02s 12M

3.12 slim (glibc) - - 0.02s 12M

3.13 alpine (musl) wheel - 0.02s 11.3M

3.13 alpine (musl) - - 0.02s 11.2M

3.13 slim (glibc) wheel 1.6s 0.04s 12M

3.13 slim (glibc) - - 0.02s 12M

3.9 alpine (musl) wheel - 0.01s 17.4M

3.9 alpine (musl) - - 0.01s 17.4M

3.9 slim (glibc) wheel 1.8s 0.01s 18M

3.9 slim (glibc) - - 0.01s 18M

Imports

setproctitle
wrong
```
import setproctitle; setproctitle.setproctitle()
```
correct
```
from setproctitle import setproctitle
```
While 'import setproctitle' works, directly importing 'setproctitle' (the function) is common for brevity and clarity when only this function is needed.
getproctitle
```
from setproctitle import getproctitle
```
setthreadtitle
```
from setproctitle import setthreadtitle
```
getthreadtitle
```
from setproctitle import getthreadtitle
```

Quickstart verified last tested: 2026-04-24

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.

import setproctitle
import time
import os

original_title = setproctitle.getproctitle()
print(f"Original process title: {original_title}")

new_title = f"my_worker_process_id_{os.getpid()}"
setproctitle.setproctitle(new_title)
print(f"New process title: {setproctitle.getproctitle()}")

# Simulate some work
time.sleep(5)

setproctitle.setproctitle(original_title)
print(f"Restored original process title: {setproctitle.getproctitle()}")