CPython

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CPython

File:Python logo.svg
Developer(s)	Python Software Foundation
Stable release	3.1.1 / August 16, 2009; 49135991 ago
Written in	C
Platform	Cross-platform
Type	Python Programming Language Interpreter
License	Python Software Foundation License
Website	Python.org

CPython is the default, most-widely used implementation of the Python programming language. It is written in C. In addition to CPython, there are two other production-quality Python implementations: Jython, written in Java, and IronPython, which is written for the Common Language Runtime, as well as several experimental implementations.^[1]

CPython is a bytecode interpreter. It has a foreign function interface with several languages including C, in which one must explicitly write bindings in a language other than Python.

Contents 1 Supported platforms 2 Previously supported platforms 3 External ports 4 Concurrency issues 5 Notes 6 References

[edit] Supported platforms

Unix-like AIX operating system BSD Darwin FreeBSD HP-UX IRIX 5 and later Plan 9 from Bell Labs Mac OS X NetBSD Linux OpenBSD Solaris Tru64 Other Unixes

Desktop OSes AROS AtheOS BeOS Windows Windows NT OS/2 RISC OS

Special and embedded GP2X iPodLinux Nintendo DS Nintendo Gamecube Symbian OS Series60 Nokia 770 Internet Tablet Nokia N800 Nokia N810 Palm OS PlayStation 2 PlayStation 3 (Linux) Psion QNX Sharp Zaurus Xbox/XBMC VxWorks Openmoko

Mainframe and other OS/390 VMS z/OS

[edit] Previously supported platforms

PEP 11 lists platforms which are not supported in CPython by Python Software Foundation. These platforms can still be supported by external ports. See below.

• DOS (unsupported since 2.0)
• IRIX 4 (unsupported since 2.3)
• Mac OS 9 (unsupported since 2.4)
• MINIX (unsupported since 2.3)

[edit] External ports

These are ports not integrated to Python Software Foundation's official version of CPython, with links to its main development site. Ports often include additional modules for platform-specific functionalities, like graphics and sound API for PSP and SMS and camera API for S60.

• Amiga: AmigaPython
• AS/400: iSeriesPython
• DOS using DJGPP: PythonD
• PlayStation Portable: Stackless Python for PSP
• Symbian OS: Python for S60
• Windows CE/Pocket PC: Python Windows CE port

[edit] Concurrency issues

The main issue of using CPython on a multiprocessor computer is the presence of a Global Interpreter Lock on each CPython interpreter process, which effectively disables concurrent Python threads within one process.^[1] To be truly concurrent in multiprocessor environment, separate CPython interpreter processes have to be run, which makes establishing communication between them a difficult task. There is constant discussion whether to remove the GIL from CPython.^[2]

[edit] Notes

1. ^  Martelli, Alex (2006). Python in a Nutshell (2nd edition ed.). O'Reilly. pp. 5–7. ISBN 0-596-10046-9. 

[edit] References

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