What makes a module reusable?

In order for a module or package to be reusable, it has to meet the following requirements:

  • It must function as a standalone unit
  • If your package is intended to be included as part of the source code for another system, you must use relative imports to load the other modules within your package
  • Any external dependencies must be clearly noted

If a module or package does not meet these three requirements, it would be very hard, if not impossible, to reuse it in other programs. Let's now take a closer look at each of these requirements in turn.

Functioning as a standalone unit

Imagine that you decide to share a module named encryption, which performs text encryption using public/private key pairs. Another programmer then copies ...

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