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PSI - Python System Information

PSI is a Python package providing real-time access to processes and other miscellaneous system information such as architecture, boottime and filesystems. It has a pythonic API which is consistent accross all supported platforms but also exposes platform-specific details where desirable.

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>>> import pwd
>>> import psi
>>> import psi.process
>>> for p in psi.process.ProcessTable().values():
...     if 'postfix' in p.command:
...         break
... 
>>> p.command
'/usr/lib/postfix/master'
>>> pwd.getpwuid(p.euid).pw_name
'root'
>>> p.children()
FutureWarning: Experimental method
[psi.process.Process(pid=30381), psi.process.Process(pid=16111), psi.process.Process(pid=30034)]
>>> 'RSS: %.2f Kb' % (p.rss / 1024.0)
'RSS: 1904.00 Kb'
>>> str(p.cputime.timedelta())
'0:00:02.040000'
>>> str(p.start_time.datetime())
'2009-07-29 09:06:28.780872'
>>> str(psi.boottime().datetime())
'2009-07-29 08:58:04'

Under the hood it is mostly implemented as a number of extension modules written in C. This offers the most flexible way to retrieve system-depended information on all platforms leveraging native system calls and core library APIs while avoiding any other external dependencies.

Currently the supported platforms include Linux, Darwin, SunOS and AIX and all versions of Python starting from 2.2 are supported, including the 3.x series. In the future platform support for at least Windows and BSD are planned, as well as more modules providing access to other areas of the system such as memory, CPU, network interfaces etc.

All of PSI is available under the MIT license.

News

21 November 2009 - PSI 0.3b2 released

Version 0.3b2 has been released and is available for download from PyPI. It has many improvements:

• Improved handling of time.
• Improved handling of process names and arguments which simplifies usage by promising availability for some attributes.
• New experimental methods on Process objects: .children() and .kill().
• The ability to get the process list from a 64-bit process while running in a 32-bit python on Solaris.
• New experimental mount module.

And many more small fixes and improvements!

12 August 2009 - PSI Lightning Talks

Floris and Chris recently gave lightning talks about PSI at EuroPython 2009 and MelbournePUG respectively. See Presentations for the slides.

TOC

• Mailing List

• Documentation

• Development Resources

• PSI Presentations

• Previous News

Related Projects

psutil

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