To demonstrate how to list environment variables in Python, let's consider a scenario Oman Phone Number where a developer is working on a web application that relies on certain environment variables for configuration. The developer wants to ensure that all necessary variables are set correctly before deploying the application to a production environment.
One way to list all currently set environment variables in Python is to use the `os` module, which provides a way to interact with the operating system. The dictionary contains all the environment variables that are currently set, and we can use a simple `for` loop to iterate over the dictionary and print out each variable and its value.
It's important to note that while listing and setting environment variables can be useful, developers should exercise caution when working with sensitive information. Environment variables can contain sensitive data such as API keys, passwords, or other confidential information, so it's important to handle them securely and avoid exposing them inadvertently.