Clean Code in Python

DRY/OAOO

The ideas of Don't Repeat Yourself (DRY) and Once and Only Once (OAOO) are closely related, so they were included together here. They are self-explanatory, you should avoid duplication at all costs.

Things in the code, knowledge, have to be defined only once and in a single place. When you have to make a change in the code, there should be only one rightful location to modify. Failure to do so is a sign of a poorly designed system.

Code duplication is a problem that directly impacts maintainability. It is very undesirable to have code duplication because of its many negative consequences:

• It's error prone: When some logic is repeated multiple times throughout the code, and this needs to change, it means we depend on efficiently ...