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

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


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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.

๐Ÿ”ถ Environment Variables in Python ๐Ÿ”ถ

๐Ÿ”ถ 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.

๐Ÿ”ถ Securing Sensitive Information:

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

  • Never hardcode sensitive information in your code.

๐Ÿ”ถ Command Line Arguments in Python

๐Ÿ”ถ 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.

๐Ÿ”ถ Practice Exercises and Examples

Example: Customizing DevOps Automation Tasks:

import sys

def addition():
    add = num1 + num2

def subtraction():
    sub = num1 - num2

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

if operation == 'add':

if operation == 'sub':

import os


๐Ÿ”ถ 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:

Happy Learning :)

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