How can I use urlparse to extract domain names from URLs in Python? or What's the best way to handle

urlparse’s netloc being empty usually means the URL’s format is off. Like, "example.com/path" isn’t valid—it needs the "//" after the scheme.

Quick test:
```python
from urllib.parse import urlparse
print(urlparse("//example.com/path")) # netloc should pop now
```

For tools, https://docs.python.org/3/library/urllib.parse.html is my go-to.

Also, check for hidden whitespace in your URL string. Happens more than you’d think!