Fix "django.urls.exceptions.NoReverseMatch: Reverse for 'database_file' not found. 'database_file' is not a valid view function or pattern name" error

[girumb]

Sometimes wtih URL reference url(r'', include('binary_database_files.urls'), the reverse lookup fails and throws the error:
django.urls.exceptions.NoReverseMatch: Reverse for 'database_file' not found. 'database_file' is not a valid view function or pattern name