Provide infoextractor name in return value of extract_file_info #555
Description
Is your feature request related to a problem? Please describe.
When using surfactant as a library, the extract_file_info function returns a list of file metadata. However, we don't know which infoextractor provides which value.
Describe the solution you'd like
extract_file_info returns a dictionary where the key is the infoextractor and the value is the output.
Describe alternatives you've considered
Alternatively, keep it a list but have each returned value contain infoextractor: <infoextractor> pairs.
Otherwise, we could create schema for each infoextractor.
Additional context
The schema option will probably prove to be difficult due to the arbitrary nature of possible fields.