👀 Views: 3 💬 Answers: 1 📅 Created: 2025-06-11

regex python ipv6 Python

I'm experimenting with I need help solving I've looked through the documentation and I'm still confused about I'm trying to validate IPv6 addresses in Python using regular expressions, but I'm running into issues when it comes to compressed formats... For instance, my regex fails to match addresses like `2001:0db8:0000:0042:0000:8a2e:0370:7334` and `2001:db8::1`. I've created a regex pattern that captures most of the standard formats, but it seems to break when it deals with the shorthand representation. Here’s my current regex pattern: ```python import re ipv6_pattern = r'([0-9a-fA-F]{1,4}:){7}([0-9a-fA-F]{1,4}|:)| ([:]{1,2}([0-9a-fA-F]{1,4}:){0,6}([0-9a-fA-F]{1,4}|:))|\ (([0-9a-fA-F]{1,4}:){1,6}:([0-9a-fA-F]{1,4}|:))' # Example address to test address = '2001:db8::1' match = re.fullmatch(ipv6_pattern, address) print('Match found!' if match else 'No match.') ``` When I run this code, I get 'No match.' for the compressed format. I’ve tried adjusting the regex by adding optional patterns for the colons, but it hasn't resolved the scenario. I also reviewed the Python re module documentation for regex patterns, but I’m still exploring. Could anyone provide insight into how I could modify my regex to properly validate both full and compressed IPv6 addresses? I'm currently using Python 3.10. Thanks in advance! My development environment is macOS. Has anyone else encountered this? The project is a web app built with Python. Am I approaching this the right way? Thanks in advance!