A partial reimplementation of psutil in pure Python using ctypes. Currently, only Linux, macOS, and the BSDs are supported, but Windows support is planned.
pypsutil's API is very similar to psutil's:
>>> import pypsutil
>>> p = pypsutil.Process()
>>> p.pid
477967
>>> p
Process(pid=477967, name='python3', status='running', started='12:00:40')
>>> p.name()
'python3'
>>> p.exe()
'/usr/bin/python3.9'
>>> p.cwd()
'/tmp'
>>> p.cmdline()
['python3']
>>> p.terminal()
'/dev/pts/6'
>>> p.status()
<ProcessStatus.RUNNING: 'running'>
>>> p.ppid()
477771
>>> p.parent()
Process(pid=477771, name='bash', status='sleeping', started='12:00:33')
More information is available in the documentation.