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# PyPy

From ArchWiki

PyPy is an alternate implementation of the Python 2.7.2 interpreter. PyPy's benefits are in the area of speed, memory usage, sandboxing and stacklessness. It is compatible with Cpython with [http://pypy.org/compat.html some exceptions. PyPy also can be used to compile Rpython programs to C code.

## Installation

Install the pypy package from the official repositories.

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

## Usage

Basic PyPy usage is done through the `pypy` 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 example.py

where example.py is the file name of the program.

## EasyInstall

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.

    sudo mkdir /opt/pypy/site-packages/

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

    cd /opt/pypy/
    sudo wget python-distribute.org/distribute_setup.py
    sudo pypy distribute_setup.py

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

### Installing EasyInstall Packages

To install EasyInstall package package_name into PyPy enter

    sudo /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.

    sudo /opt/pypy/bin/easy_install lamson

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

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

## See Also

PyPy website

Python

Retrieved from "https://wiki.archlinux.org/index.php?title=PyPy&oldid=241229"
Category:

- Development

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