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PyPy
PyPy is a Python interpreter and just-in-time compiler. PyPy focuses on speed, efficiency and compatibility with the original CPython interpreter.〔
PyPy started out being a Python interpreter written in the Python language itself. Current PyPy versions are translated from RPython to C code and compiled. The PyPy JIT (short for "Just In Time") compiler is capable of turning Python code into machine code at run time.
==Details and motivation==
PyPy was conceived to be an implementation of Python written in a programming language that is similar to Python. This makes it easy to identify areas where it can be improved and makes PyPy more flexible and easier to experiment with than CPython.
PyPy aims to provide a common translation and support framework for producing implementations of dynamic languages, emphasizing a clean separation between language specification and implementation aspects. It also aims to provide a compliant, flexible and fast implementation of the Python programming language using the above framework to enable new advanced features without having to encode low level details into it.〔(【引用サイトリンク】date=March 2007 )〕〔(【引用サイトリンク】 PyPy - Goals and Architecture Overview - Mission Statement )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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