Stackless Python PyPy, a self-hosting Python interpreter and JIT compiler. Although the whole Stackless is a separate distribution, its switching functionality has been successfully packaged as a CPython extension called greenlet. It is used by a number of libraries (e.g. gevent) to provide a "green threading" solution for CPython. Python since has received a native solution for green threads: await/async. Stackless is used extensively in the implementation of the "Eve Online" massively multiplayer online game as well as in IronPort's mail platform. Stackless Python Stackless Python, or Stackless, is a Python programming language interpreter, so named because it avoids depending on the
YouTube number of videos, can be downloaded as MP4 files. Numerous third-party web sites, applications and browser plug-ins allow users to download YouTube videos. In February 2009, YouTube announced a test service, allowing some partners to offer video downloads for free or for a fee paid through Google Checkout. In June 2012, Google sent cease and desist letters threatening legal action against several websites offering online download and conversion of YouTube videos. In response, Zamzar removed the ability to download YouTube videos from its site. Users retain copyright of their own work, but have the option to grant certain usage rights