Re: [Python-ideas] PEP 8: raw strings & regular expressions

On 27.10.15 04:26, Chris Angelico wrote:

Fortunately, it's easy to write a function that validates a regex.

def is_regex(s): try: re.compile(s) except re.error: return False return True

re.compile() also can raise OverflowError ('.{,9999999999}') and ValueError ('(?ua)').