Spans key weird behaviour

ents_to_spans.py

import spacy
from spacy.tokens import DocBin, SpanGroup
from wasabi import msg
from copy import copy


def main():
    text = "When Sebastian Thrun started working on self-driving cars at Google in 2007, few people outside of the company took him seriously."
    nlp = spacy.load("en_core_web_sm")
    doc = nlp(text)

    spans_key = "sc"

    msg.info("Trying out SpanGroup approach")
    doc_sg = copy(doc)  # copy doc to make sure it's a different one
    if spans_key not in doc_sg.spans:
        doc_sg.spans[spans_key] = SpanGroup(doc_sg)

    doc_sg.spans[spans_key].extend(list(doc_sg.ents))
    db_sg = DocBin(docs=[doc_sg])

    msg.text("Deserializing the DocBin and checking the output...")
    deserialized_docs_sg = list(db_sg.get_docs(nlp.vocab))

    print(deserialized_docs_sg[0].spans)

    msg.info("Trying out iteration approach")
    doc_it = copy(doc)  # copy doc to make sure it's a different one
    spans = [ent for ent in doc_it.ents]
    group = SpanGroup(doc_it, name=spans_key, spans=spans)
    doc_it.spans[spans_key] = group
    db_it = DocBin(docs=[doc_it])

    msg.text("Deserializing the DocBin and checking the output...")
    deserialized_docs_it = list(db_it.get_docs(nlp.vocab))

    print(deserialized_docs_it[0].spans)


if __name__ == "__main__":
    main()

Sample output: