The DevOps Engineer's Toolkit: Must-Know Python Libraries

Oct 31, 2023ยท

3 min read

Python's strength lies not only in its simplicity but also in its rich ecosystem of libraries and modules. These libraries empower DevOps engineers to automate complex tasks, streamline workflows, and orchestrate entire pipelines with ease.

  • Reading JSON and YAML data in Python
    The following are reasons for preferring Python to read or analyse JSON/YAML data:

    1. Configuration Management: In DevOps, you often need to manage configuration files. JSON and YAML are common formats for these configurations. Using Python to read and manipulate these files allows you to automate configuration changes, making your infrastructure more flexible and maintainable.

    2. Infrastructure as Code (IaC): DevOps engineers use IaC tools like Terraform and Ansible, which utilize JSON or YAML files to define infrastructure. By mastering these data formats in Python, you can generate, modify, or validate IaC scripts programmatically.

    3. Automation: DevOps tasks like provisioning servers, deploying applications, or orchestrating workflows often involve JSON/YAML data formats. Python enables you to automate these tasks efficiently.

    4. Integration: DevOps tools and systems frequently generate output in JSON or YAML. To extract meaningful information from these outputs, you need to parse them. Python's libraries for these formats make this process easy and allow you to integrate various tools seamlessly.

  • Libraries in Python
    Python has numerous libraries like os, sys, json, yaml etc that a DevOps Engineer can use in day-to-day tasks.

    • os Library:

      Purpose: The os library in Python serves as a bridge between your code and the underlying operating system. It empowers you to perform an array of operations related to file and directory management, process control, and environment variable manipulation.

      Common Use Cases: DevOps engineers leverage this library for tasks like changing working directories, navigating file systems, executing shell commands from Python, and fine-tuning environment variables to suit specific requirements.

    • sys Library:

      Purpose: The sys library is a gateway to Python interpreter variables and functions, providing you with the ability to interact with the Python runtime environment effectively.

      Common Use Cases: This library is frequently used for tasks such as accessing command-line arguments, gracefully exiting scripts with custom exit codes, and making runtime adjustments to Python behavior.

    • json Library:

      Purpose: The json library is your go-to tool for handling JSON (JavaScript Object Notation) data. It equips you with functions to seamlessly parse JSON data into Python objects and serialize Python objects into JSON format.

      Common Use Cases: This library is widely employed for tasks such as reading and writing JSON files, facilitating data exchange between applications, and managing JSON-based configurations.

    • yaml Library (PyYAML):

      Purpose: The PyYAML library is your essential companion for parsing and harnessing YAML data in Python. It empowers you to effectively read and create YAML files and seamlessly convert YAML data into Python objects.

      Common Use Cases: This library plays a pivotal role in managing configuration files, collaborating with infrastructure-as-code (IaC) tools like Ansible and Kubernetes, and handling structured data in various DevOps tasks.

  • Tasks

    1. Create a Dictionary in Python and write it to a json File.

    2. Read a json file services.json kept in this folder and print the service names of every cloud service provider.

      aws : ec2

      azure : VM

      gcp : compute engine

    3. Read YAML file using python, file services.yaml and read the contents to convert yaml to json.

Thank you!