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PyPy is an alternate implementation of the Python 2.7.10 and 3.2.5 interpreters. PyPy's benefits are in the area of speed, memory usage, sandboxing and stacklessness. It is compatible with CPython with some exceptions. PyPy also can be used to compile RPython programs to C code.


For Python 2.7, install the pypy package from the official repositories. For Python 3, install the pypy3 package.

PyPy is installed in /opt/pypy/ or /opt/pypy3 and the main pypy executable is bin/pypy-c


Basic PyPy usage is done through the pypy or pypy3 command and functions similarly to CPython usage. Enter

$ pypy -h

to view the listing of pypy options.

Interactive interpreter

To load the pypy interactive interpreter run

$ pypy

Run program from file

To run a Python program from a file in pypy run

$ pypy

where is the file name of the program.

Virtual environment creation

To make a virtual environment with PyPy

$ virtualenv --python=/usr/bin/pypy venv-pypy

see Python/Virtual environment for further information

Installing pip

As python packages for pypy aren't distributed as Arch packages the most convenient thing is to install what you require as your own user.

 $ pypy -m ensurepip --user
 $ pypy -m pip install --user --upgrade pip

Once you have pip you can install any package you need, eg:

 $ pypy -m pip install --user sqlalchemy

If you'd prefer to install packages system wide just run the previous commands as root without the --user. Note that this will result in the packages being installed in /opt/pypy without the package manager being aware of them.


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Notes: please use the first argument of the template to provide more detailed indications. (Discuss in Talk:PyPy#)

Python libraries and programs can be installed in PyPy through EasyInstall. PyPy libraries are stored in a different folder then CPython libraries.

EasyInstall installation

EasyInstall does not come with the PyPy package and must be installed manually. Create the /opt/pypy/site-packages/ folder which will be needed for the EasyInstall installation.

# mkdir /opt/pypy/site-packages/

Download to the folder /opt/pypy/ and run it. will install EasyInstall.

$ cd /opt/pypy/
# wget
# pypy

EasyInstall is located at /opt/pypy/bin/easy_install

Installing EasyInstall packages

To install EasyInstall package package_name into PyPy enter

# /opt/pypy/bin/easy_install package_name

Packages Will be Located at /opt/pypy/site-packages Installed libraries and applications will be at /opt/pypy/bin Programs installed through EasyInstall on PyPy can usually be ran with /opt/pypy/bin/program_name where program_name is the name of the PyPy program.

EasyInstall package example

The following will install the Lamson email framework.

# /opt/pypy/bin/easy_install lamson

The following will run the framework's gen-project option

$ /opt/pypy/bin/lamson gen -project testproject