Python Regular Expressions Mastery

Create regex patterns for: [DESCRIBE YOUR TEXT PROCESSING NEEDS]

Text to process:
```
[PASTE SAMPLE TEXT]
```

Patterns needed for:
- [ ] Email validation
- [ ] Phone numbers
- [ ] URLs
- [ ] IP addresses
- [ ] Dates/times
- [ ] Custom format: [DESCRIBE]

Provide:
1. Pattern with explanation
2. re.match vs re.search vs re.findall
3. Capture groups
4. Named groups
5. Non-capturing groups
6. Lookahead and lookbehind
7. Compiled patterns for performance
8. re.sub for replacements
9. Verbose patterns with comments
10. Common pitfalls
11. Testing regex patterns
12. Alternatives to regex