Install pip python

pip is the easiest way to install psutil. It is shipped by default with Python 2.7.9+ and 3.4+. For other Python versions you can install it manually.
On Linux or via wget:

wget https://bootstrap.pypa.io/get-pip.py -O - | python

On OSX or via curl:

python < <(curl -s https://bootstrap.pypa.io/get-pip.py)

On Windows, download pip, open cmd.exe and install it:

C:\Python27\python.exe get-pip.py

Permission issues (UNIX)

The commands below assume you're running as root. If you're not or you bump into permission errors you can either:

• prepend sudo, e.g.:

sudo pip install psutil

• install psutil for your user only (not at system level):

pip install --user psutil

Linux

Ubuntu / Debian:

sudo apt-get install gcc python-dev python-pip
pip install psutil

RedHat / CentOS:

sudo yum install gcc python-devel python-pip
pip install psutil

If you're on Python 3 use python3-dev and python3-pip instead.

OSX

Install Xcode first, then:

pip install psutil

Windows

The easiest way to install psutil on Windows is to just use the pre-compiled exe/wheel installers hosted on PYPI via pip:

C:\Python27\python.exe -m pip install psutil
If you want to compile psutil from sources you'll need Visual Studio (Mingw32 is no longer supported):

• Python 2.6, 2.7: VS-2008
• Python 3.3, 3.4: VS-2010
• Python 3.5+: VS-2015

Compiling 64 bit versions of Python 2.6 and 2.7 with VS 2008 requires Windows SDK and .NET Framework 3.5 SP1. Once installed run vcvars64.bat, then you can finally compile (see here). To compile / install psutil from sources on Windows run:

make.bat build
make.bat install

FreeBSD

pkg install python gcc
python -m pip install psutil

OpenBSD

export PKG_PATH="http://ftp.openbsd.org/pub/OpenBSD/`uname -r`/packages/`arch -s`/"
pkg_add -v python gcc
python -m pip install psutil

NetBSD

export PKG_PATH="ftp.netbsd.org/pub/pkgsrc/packages/NetBSD/`uname -m`/`uname -r`/All"
pkg_add -v pkgin
pkgin install python gcc
python -m pip install psutil

Solaris

If cc compiler is not installed create a symlink to gcc:

sudo ln -s /usr/bin/gcc /usr/local/bin/cc

Install:

pkg install gcc
python -m pip install psutil

Install from sources

git clone https://github.com/giampaolo/psutil.git
cd psutil
python setup.py install

Example :

root@dns:/home/pi # pip install psutil
Collecting psutil
  Downloading psutil-5.4.1.tar.gz (408kB)
    100% |████████████████████████████████| 409kB 234kB/s
Building wheels for collected packages: psutil
  Running setup.py bdist_wheel for psutil ... done
  Stored in directory: /root/.cache/pip/wheels/05/a2/2a/2015d6af91fb5a4cc5bcdfa9699034e2f624fc9cc5acde7ab9
Successfully built psutil
Installing collected packages: psutil
Successfully installed psutil-5.4.1

root@dns:/home/pi # ./meminfo.py
MEMORY
------
Total      :  927.3M
Available  :  767.2M
Percent    :    17.3
Used       :   80.5M
Free       :  416.4M
Active     :  209.9M
Inactive   :  260.4M
Buffers    :   30.1M
Cached     :  400.3M
Shared     :   25.4M
SWAP
----
Total      :  100.0M
Used       :      0B
Free       :  100.0M
Percent    :     0.0
Sin        :      0B
Sout       :      0B
root@dns:/home/pi #