Python 解釋器 PyPy
PyPy 是用Python實現的Python解釋器。
PyPy是，Python開發者為了更好的Hack Python創建的項目。此外，PyPy比CPython是更加靈活，易于使用和試驗，以制定具體的功能在不同情況的實現方法，可以很容易實施。 該項目的目標是，讓PyPy比C實現的Python更為容易的適應各個項目和方便裁剪。
- Speed: thanks to its Just-in-Time compiler, Python programs often run faster on PyPy. (What is a JIT compiler?)
- Memory usage: large, memory-hungry Python programs might end up taking less space than they do in CPython.
- Compatibility: PyPy is highly compatible with existing python code. It supports ctypes and can run popular python libraries like twisted and django.
- Sandboxing: PyPy provides the ability to run untrusted code in a fully secure way.
- Stackless: PyPy can be configured to run in stackless mode, providing micro-threads for massive concurrency.
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