Function load_dictionary_from_file 

pub fn load_dictionary_from_file<P: AsRef<Path>>(
    content_path: P,
    index_path: P,
) -> Result<Dictionary, DictError>

Load dictionary from given paths

A dictionary is made of an index and a dictionary (data) file, both are opened from the given input file names. Gzipped files with the suffix .dz will be handled automatically.