# django.urls.exceptions.NoReverseMatch: Reverse for 'profile' with arguments '('',)' not found. 1 pattern(s) tried: ['user/profile/(?P<username>[^/]+)/$']

- **ID:** `python/django-url-reverse-extra-args`
- **Domain:** python
- **Category:** config_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

Passing an empty string as a URL argument where a non-empty value is expected.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 3.x | active | — | — |

## Workarounds

1. **** (90% success)
   ```
   Ensure the username is not empty: if username: url = reverse('profile', args=[username])
   ```

## Dead Ends

- **** — Breaks DRY principle and URL maintainability. (40% fail)
- **** — Causes 500 errors on pages. (30% fail)