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55 | <H1><A NAME="SECTION003100000000000000000"></A><A NAME="implementations"></A> | |
56 | <BR> | |
57 | 1.1 Alternate Implementations | |
58 | </H1> | |
59 | ||
60 | <P> | |
61 | Though there is one Python implementation which is by far the most | |
62 | popular, there are some alternate implementations which are of | |
63 | particular interest to different audiences. | |
64 | ||
65 | <P> | |
66 | Known implementations include: | |
67 | ||
68 | <P> | |
69 | <DL COMPACT> | |
70 | <DT>CPython</DT> | |
71 | <DD>This is the original and most-maintained implementation of Python, | |
72 | written in C. New language features generally appear here first. | |
73 | ||
74 | <P> | |
75 | </DD> | |
76 | <DT>Jython</DT> | |
77 | <DD>Python implemented in Java. This implementation can be used as a | |
78 | scripting language for Java applications, or can be used to create | |
79 | applications using the Java class libraries. It is also often used to | |
80 | create tests for Java libraries. More information can be found at | |
81 | <a class="ulink" href="http://www.jython.org/" | |
82 | >the Jython website</a>. | |
83 | ||
84 | <P> | |
85 | </DD> | |
86 | <DT>Python for .NET</DT> | |
87 | <DD>This implementation actually uses the CPython implementation, but is a | |
88 | managed .NET application and makes .NET libraries available. This was | |
89 | created by Brian Lloyd. For more information, see the <a class="ulink" href="http://www.zope.org/Members/Brian/PythonNet" | |
90 | >Python | |
91 | for .NET home page</a>. | |
92 | ||
93 | <P> | |
94 | </DD> | |
95 | <DT>IronPython</DT> | |
96 | <DD>An alternate Python for .NET. Unlike Python.NET, this is a complete | |
97 | Python implementation that generates IL, and compiles Python code | |
98 | directly to .NET assemblies. It was created by Jim Hugunin, the | |
99 | original creator of Jython. For more information, see <a class="ulink" href="http://workspaces.gotdotnet.com/ironpython" | |
100 | >the | |
101 | IronPython website</a>. | |
102 | ||
103 | <P> | |
104 | </DD> | |
105 | <DT>PyPy</DT> | |
106 | <DD>An implementation of Python written in Python; even the bytecode | |
107 | interpreter is written in Python. This is executed using CPython as | |
108 | the underlying interpreter. One of the goals of the project is to | |
109 | encourage experimentation with the language itself by making it easier | |
110 | to modify the interpreter (since it is written in Python). Additional | |
111 | information is available on <a class="ulink" href="http://codespeak.net/pypy/" | |
112 | >the PyPy project's home | |
113 | page</a>. | |
114 | </DD> | |
115 | </DL> | |
116 | ||
117 | <P> | |
118 | Each of these implementations varies in some way from the language as | |
119 | documented in this manual, or introduces specific information beyond | |
120 | what's covered in the standard Python documentation. Please refer to | |
121 | the implementation-specific documentation to determine what else you | |
122 | need to know about the specific implementation you're using. | |
123 | ||
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