Generating a list of values a regex COULD match in Python

Question

I\'m trying to use a regex as an input, and from there generate all the possible values that the regex would match.

So, for example, if the regex is \"three-letter w

Answer 1

You don't want to do this. Most of the result sets will be huge, and some will be infinite. Instead use a sequence of test vectors and apply the regex against each in turn:

vectors = (
  'foo',
  'bar',
  ...
)

for result in (re.match(someregex, entry) for entry in vectors):
  ...