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    Python - Network Programming


    The threading module in Python's standard library is capable of handling multiple threads and their interaction within a single process. Communication between two processes running on the same machine is handled by Unix domain sockets, whereas for the processes running on different machines connected with TCP (Transmission control protocol), Internet domain sockets are used.

    network_programming

    Python's standard library consists of various built-in modules that support interprocess communication and networking. Python provides two levels of access to the network services. At a low level, you can access the basic socket support in the underlying operating system, which allows you to implement clients and servers for both connection-oriented and connectionless protocols.

    Python also has libraries that provide higher-level access to specific application-level network protocols, such as FTP, HTTP, and so on.

    Protocol Common function Port No Python module
    HTTP Web pages 80 httplib, urllib, xmlrpclib
    NNTP Usenet news 119 nntplib
    FTP File transfers 20 ftplib, urllib
    SMTP Sending email 25 smtplib
    POP3 Fetching email 110 poplib
    IMAP4 Fetching email 143 imaplib
    Telnet Command lines 23 telnetlib
    Gopher Document transfers 70 gopherlib, urllib