E is for environment variables - Python A to Z

Python A-Z is a blog series about Python. Each day, I share insights, ideas and examples for different parts of Python development that match with the letter of the day. Blaugust is an annual blogging festival in August where the goal is to write a blog post every day of the month. The code that a program runs is provided by the developer of the program. The inputs and interactions are initiated by the user of the program. The environment variables are data provided by the system that runs it. They are used to abstract configuration to the system level so that the same code can be ran in different environments and act differently (for example, development vs production environments). Accessing environment variables In Python, you can access environment variables through os.environ dictionary. If you run the following in a REPL, you’ll see all the environment variables Python has access to. >>> for variable, value in os.environ.items(): ... print(f'{variable}: {value}') ... The…