6.Complete Python Basics for Automation-- Python First Script "Hello world"

Introduction

This tutorial will guide you through the basics of Python programming, focusing on creating your first script: "Hello World." This foundational knowledge is essential for anyone interested in network automation using Python. By the end of this guide, you will be able to write, execute, and understand basic Python scripts.

Step 1: Setting Up Your Environment

Before you can write your first Python script, you need to set up your development environment.

• Choose an IDE or Text Editor:
  • You can use IDLE (comes with Python), Visual Studio Code, or any text editor like Notepad++.
• Install Python:
  • Download and install Python from the official Python website.
  • Make sure to check the box to add Python to your system PATH during installation.

Step 2: Writing Your First Script

Now that you have your environment set up, it's time to write your first script.

• Open Your IDE or Text Editor.

• Create a New File:

  • Name the file hello_world.py.

• Write the Code:

  • Enter the following code in the file:

  print("Hello, World!")
  

Step 3: Running Your Script

After writing your script, the next step is to execute it.

For Windows:

• Open Command Prompt.

• Navigate to the directory where your script is saved using the cd command. For example:

  cd C:\path\to\your\script
  

• Run the script by typing:

  python hello_world.py
  

For Linux:

• Open Terminal.

• Navigate to the directory with your script:

  cd /path/to/your/script
  

• Execute the script using:

  python3 hello_world.py
  

Step 4: Understanding the Output

After running your script, you should see the output:

Hello, World!

This message confirms that your Python installation and script execution are functioning correctly.

Step 5: Exploring Python Basics

Now that you've created and run a simple script, let's explore some fundamental Python concepts that are useful for automation.

• Data Types:

  • Understand the following Python data types:
    • Integer
    • Float
    • String
    • Boolean
    • List

• Basic Functions:

  • Familiarize yourself with these built-in functions:
    • type(): Returns the type of a variable.
    • print(): Outputs data to the console.
    • len(): Returns the length of an object.
    • append(): Adds an element to a list.
    • input(): Accepts user input.

• Control Flow:

  • Learn how to use conditional statements:
    • if, elif, and else for decision-making.
  • Understand loops with the for and while commands for repetitive tasks.

Conclusion

You have successfully set up your Python environment, written your first script, and learned about basic Python concepts essential for automation. The next steps could involve exploring more advanced topics like functions, loops, and data structures. Keep practicing by creating simple scripts and gradually incorporating more complex functionalities as you become comfortable with the language. Happy coding!