So, let\u2019s begin networking in Python 3.<\/span><\/p>\n Python 3 Network Programming<\/p><\/div>\n In Python, there are 2 levels of networking programs:<\/strong><\/p>\n To learn Python Network Programming, first begin with Python Socket Programming.<\/span><\/p>\n Consider a bidirectional communication channel. Its end-points are what we call sockets. Sockets may communicate in one of the following ways:<\/span><\/p>\n Learn Python Closure \u2013 Nested Functions and Nonlocal Variables<\/a><\/strong><\/p>\n Let\u2019s take a look at all we talk about when we talk about sockets.<\/span><\/p>\n Python 3 Network Programming- Python Socket vocabulary<\/p><\/div>\n For transport, we use protocols like AF_INET, PF_INET, PF_UNIX, and PF_X25, among others. This family of protocols is the domain.<\/span><\/p>\n Communication between two endpoints may typically be of type SOCK_DGRAM for connectionless protocols and SOC_STREAM for connection-oriented ones.<\/span><\/p>\n This identifies the protocol used within a domain and type. This is typically zero.<\/span><\/p>\n Servers listen to one or more ports for client calls. But what values can a port take? A Fixnum port number, a service name, or a string holding the port number.<\/span><\/p>\n A hostname is what identifies a network interface. This can be a string holding a hostname, a dotted-quad address, or an IPv6 address. This can also be a zero-length string, an Integer, or a string \u201c<broadcast>\u201d.<\/span> Let\u2019s first import the Python socket module for this.<\/span><\/p>\n Now, we can use the socket.socket(socket_family,socket_type,protocol=0) function to create a socket.<\/span><\/p>\n <socket.socket fd=1524, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0><\/p>\n Here, socket_family may take one of the values AF_UNIX and AF_INET. socket_type may be SOCK_STREAM or SOCK_DGRAM. protocol defaults to zero.<\/span><\/p>\n Now, we may call any of these methods on this object we just created.<\/span><\/p>\n![\"Python](\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/05\/Networking-in-Python-3-01.jpg\")
<\/a>Introduction to Python Network Programming<\/span><\/h3>\n
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Python Socket Vocabulary<\/span><\/h3>\n
![\"Python](\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/05\/Socket-Vocabulary-01.jpg\")
<\/a>a. Domain<\/span><\/h4>\n
b. Type<\/span><\/h4>\n
c. Protocol<\/span><\/h4>\n
d. Port<\/span><\/h4>\n
e. Hostname<\/span><\/h4>\n
\nWe can implement a socket over different channel types- like TCP and UDP. We can also use the socket library to handle transport.<\/span>
\nRead Python Modules Vs Packages<\/a><\/strong><\/p>\nPython Socket Module<\/span><\/h3>\n
>>> import socket\r\n>>><\/pre>\n
>>> mysocket=socket.socket(socket.AF_INET,socket.SOCK_STREAM)\r\n>>> mysocket<\/pre>\n
Python Socket Methods<\/span><\/h3>\n
![\"Python](\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/05\/Python-Socket-Methods-01.jpg\")
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