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What is Python network interface?

Gutha Vamsi Krishna

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

Definition

According to Wikipedia:

In computing, a network interface is a software or hardware interface between two pieces of equipment or protocol layers in a computer network. A network interface will usually have some form of network address. This may consist of a node identifier and a port number or it may be a unique node ID in its own right. Network interfaces provide standardized functions such as passing messages, connecting, disconnecting, etc.

Python netifaces module

There is no easy way to get addresses of network interfaces using Python, so to solve this, we have the netifaces library.

We will go through how to install and use netifaces step by step.

Install and import

  • Install this module with pip:
pip install netifaces
  • After installation, import this module:
import netifaces
print("successfully imported netifaces")

How to use netifaces

  • List the network interface identifiers:
import netifaces
print(netifaces.interfaces())
  • Get the addresses of a particular interface:

    • After executing the code above, it will print a list of network interface identifiers.
    • Take one of those and pass it to netifaces.ifaddresses('lo') to get addresses for that specific network interface.
  • The code snippet below outputs a dictionary, where keys are numbers that refer to a particular address family.

Note: Numbers may be different from system to system.

import netifaces
print(netifaces.ifaddresses('lo'))
  • Get AF_INET and AF_LINK addresses for the particular network interface.
import netifaces
addrs = netifaces.ifaddresses('lo')
print("AF_INET: "+str(addrs[netifaces.AF_INET]))
print("AF_LINK: "+str(addrs[netifaces.AF_LINK]))

RELATED TAGS

python
network interface
netifaces
communitycreator

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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