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Twisted (software)
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<p>Twisted is an <a href="/facts/Event-driven_programming/QlGL2Fu6">event-driven</a> <a href="/facts/Computer_network_programming/lG6r58eY">network programming</a> <a href="/facts/Software_framework/EWasA8sG">framework</a> written in <a href="/facts/Python_/YbuGqofa">Python</a> and licensed under the <a href="/facts/MIT_License/8llAQtlk">MIT License</a>. </p><p>Twisted projects variously support <a href="/facts/Transmission_Control_Protocol/WW4sPrt9">TCP</a>, <a href="/facts/User_Datagram_Protocol/dxLU0D6q">UDP</a>, <a href="/facts/Transport_Layer_Security/pGy16TnA">SSL/TLS</a>, <a href="/facts/IP_multicast/YklMRaV5">IP multicast</a>, Unix domain <a href="/facts/Unix_domain_socket/fHCylnmJ">sockets</a>, many protocols (including <a href="/facts/HTTP/TWtvf7JD">HTTP</a>, <a href="/facts/Extensible_Messaging_and_Presence_Protocol/hgulEuRA">XMPP</a>, <a href="/facts/Network_News_Transfer_Protocol/YTgxGqgR">NNTP</a>, <a href="/facts/Internet_Message_Access_Protocol/QMnyvUwk">IMAP</a>, <a href="/facts/Secure_Shell/wjVRw5zv">SSH</a>, <a href="/facts/IRC/oDr3VN9q">IRC</a>, <a href="/facts/File_Transfer_Protocol/THuWgzfw">FTP</a>, and others), and much more. Twisted is based on the <a href="/facts/Event-driven_programming/QlGL2Fu6">event-driven programming</a> paradigm, which means that users of Twisted write short <a href="/facts/Callback_(computer_science)/vPlrCJXG">callbacks</a> which are called by the framework. </p>