Day 5: Environment Variables and Command Line Arguments in Python for DevOps

Welcome back to our Python for DevOps series! Today, we'll explore the critical topics of handling environment variables and command-line arguments. These skills are essential for configuring and customizing DevOps automation tasks efficiently.

🔶 Environment Variables in Python 🔶

🔶 Reading and Writing Environment Variables:

• Python's os module provides functions like os.environ to access and modify environment variables.

• Use os.getenv("variable_name") to retrieve a specific environment variable.

🔶 Securing Sensitive Information:

• Store sensitive information, like API keys, in environment variables to keep them secure.

• Never hardcode sensitive information in your code.

🔶 Command Line Arguments in Python

🔶 Handling Command Line Arguments:

• Python's sys.argv provides access to command line arguments.

• The argparse module offers a more structured and user-friendly approach for handling command line arguments.

🔶 Practice Exercises and Examples

Example: Customizing DevOps Automation Tasks:

import sys

def addition():
    add = num1 + num2
    print(add)

def subtraction():
    sub = num1 - num2
    print(sub),

num1 = float(sys.argv[1])
operation = sys.argv[2]
num2 = float(sys.argv[3])

if operation == 'add':
    addition()

if operation == 'sub':
    subtraction()

import os

print(os.getenv("password"))

🔶 Conclusion

Understanding how to work with environment variables and command line arguments is crucial for building flexible and secure DevOps scripts. Stay tuned for Day 6, where we'll explore Operators in Python for DevOps.

Note: I am following Abhishek Verraamalla's YouTube playlist for learning.

GitHub Repo: https://github.com/Chandreshpatle28/python-for-devops-av

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Happy Learning :)

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