How to create an auto generator of regular expressions (regex)?

Question

Regular Expressions

There is a desire to create an auto generator of regular expressions (regex).
The idea is as follows: the program (function) receives an input and output string (or several such pairs) and returns the most suitable regex expression.
Expressions will be simple (consisting of a small number of elements).
The goal is to make life easier for beginners in regex (I attribute myself there, so I don’t exclude that the idea may be naive) I’m
interested in examples of analogues, as well as how best to implement this and what are the main pitfalls.

Answer 1

The main pitfall - now I'll get it out of the water for you - and so, the main stone is your unwillingness to study the documentation, "disguised" by the goal of "making life easier for beginners".
John Friedl's book "Regular Expressions" and a lot of services like regex101 will help you get out of the way and get down to business.