fork download
copy 
  1. import re
  2.  
  3. octet = r'(?:[0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])'
  4. rx = re.compile(r"\A{0}(?:\.{0}){{3}}\Z".format(octet))
  5.  
  6. def ipv4_address(ip):
  7.         return bool(rx.match(ip))
  8.  
  9. strs = ["127.0.0.1\n","127.0.0.2"]
  10. for s in strs:
  11.     print("'{}' => {}".format(s, ipv4_address(s)))	
  12.  
Success #stdin #stdout 0.04s 9632KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
'127.0.0.1
' => False
'127.0.0.2' => True
https://ideone.com/xlTBuG
language:
Python 3 (python  3.9.5)
created:
5 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!