force_properties = dict(
(k, v) for k, v in ie_result.items() if v is not None)
- for f in ('_type', 'url', 'ie_key'):
+ for f in ('_type', 'url', 'id', 'extractor', 'extractor_key', 'ie_key'):
if f in force_properties:
del force_properties[f]
new_result = info.copy()