Anki python module

seems like I found a way to open apkg file and remove not needed cards(or notes in my case, not sure if it is a correct way):

from anki.collection import ImportAnkiPackageRequest, Collection

collection = Collection("collection.anki2")
collection.import_anki_package(
    ImportAnkiPackageRequest(
        package_path="4000.apkg"
    )
)

for c in collection.find_notes(""):
    note = collection.get_note(c)
    word = note.fields[0]
    # print(note.card_ids)
    # print(word)
    if word != "arch":
        collection.remove_notes([note.id])

but now how to save this collection as apkg deck please?