Summary of "Python learning for Network Engineers Part 06 | First script using telnetlib in Python 2 & Python 3"
In this video, the presenter demonstrates how to write a basic Python script using the telnetlib library to connect to a router and retrieve output. The focus is on creating a simple script suitable for beginners, with a comparison between Python 2 and Python 3.
Key Concepts and Features:
- Telnet Library: The video covers the use of the
telnetliblibrary, which allows for Telnet connections to devices. - Python Versions: The presenter uses both Python 2.7 and Python 3.6 to illustrate differences in syntax and functionality, especially concerning the
telnetliblibrary. - virtual environments: The video discusses setting up virtual environments to manage different Python versions.
- Common Issues: The presenter encounters issues with the Python 2 console and resolves them by installing the
readlinetool, which is necessary for proper console input handling. - Basic Script Creation: A basic script is created to perform a Telnet connection, where the script prompts for a username and password, executes commands, and retrieves output.
- Variable Use: The presenter explains how to define variables for commands, usernames, and passwords, allowing for dynamic input.
- Encoding Differences: In Python 3, additional considerations for byte encoding and decoding are introduced, such as using
bin front of strings and changingraw_inputtoinput. - Best Practices: The video emphasizes the importance of setting terminal length to zero to prevent the script from hanging during output retrieval.
Product Features:
- Telnet Class: The
telnetlibprovides aTelnetclass for establishing connections to Telnet servers. - Methods: The library includes various methods like
read_all(),read_some(), andread_very()for handling data from the server.
Upcoming Content:
The presenter hints at future videos that will delve deeper into Python programming concepts such as modules, classes, and functions, as well as further scripting with telnetlib.
Main Speakers/Sources:
- The presenter of the video (not named in the subtitles).
- References to Python documentation for the
telnetliblibrary are mentioned.
Category
Technology
