Python Constants: Improve Your Code's Maintainability

In programming, the term constant refers to names representing values that don’t change during a program’s execution. Constants are a fundamental concept in programming, and Python developers use them in many cases. However, Python doesn’t have a dedicated syntax for defining constants. In practice, Python constants are just variables that never change.

To prevent programmers from reassigning a name that’s supposed to hold a constant, the Python community has adopted a naming convention: use uppercase letters. For every Pythonista, it’s essential to know what constants are, as well as why and when to use them.

In this tutorial, you’ll learn how to:

  • Properly define constants in Python
  • Identify some built-in constants
  • Use constants to improve your code’s readabilityreusability, and maintainability
  • Apply different approaches to organize and manage constants in a project
  • Use several techniques to make constants strictly constant in Python

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