Question

Which of the following functions clears the regular expression cache?

(a) re.sub()

(b) re.pos()

(c) re.purge()

(d) re.subn()

This question was posed to me during a job interview.

I'm obligated to ask this question of Regular Expressions in section Regular Expressions and Files of Python

Answer 1

Right answer is (c) re.purge()

The best I can explain: The function which clears the regular expression cache is re.purge(). Note that this function takes zero positional arguments.