Is it possible to use re.compile to exclude certain numbers? For
example, this will find IP addresses:
ip = re.compile('\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}')
But it will also find 999.999.999.999 (something which could not
possibly be an IPv4 address). Can re.compile be configured to filter
results like this out?