Can Beets script the process of adding track number metadata?

[TwonkyHardware]

I have a large sample of music files that I ripped without metadata. I'm looking for a way to script adding track number metadata to them so that I can play them as albums.

The files are organized in directories by artist and album, like so

Albums/Aerosmith/Aerosmith/
Albums/Aerosmith/Get a Grip/
...
Albums/The Beatles/Abbey Road/
Albums/The Beatles/Revolver/
Albums/The Beatles/Rubber Soul/

with each folder containing the .mp3 files for that album.

Since the tracks don't have metadata, Beets has a hard time identifying these as albums, but I can use the import function's "Enter search" option successfully by searching for the artist and album title manually:

~/Albums/10,000 Maniacs/Our_Time_in_Eden$ beet import .

~/Albums/10,000 Maniacs/Our_Time_in_Eden (13 items)
No matching release found for 13 tracks.
For help, see: https://beets.readthedocs.org/en/latest/faq.html#nomatch
➜ [S]kip, Use as-is, as Tracks, Group albums, Enter search, enter Id, aBort? E
Artist: 10,000 Maniacs
Album: Our Time in Eden

  Match (81.2%):
  10,000 Maniacs - Our Time in Eden
  ≠ album, artist
  MusicBrainz, CD, 1992, US, Elektra, 9 61385-2, Club Edition - BMG, Specialty Pressing
  https://musicbrainz.org/release/112efc66-3d1b-421b-9316-9295c2f2bab4
  ≠ Artist:  -> 10,000 Maniacs
     ≠ (#0) Noah’s_Dove (4:31) -> (#1) Noah’s Dove (4:31)
     ≠ (#0) These_Are_Days (3:42) -> (#2) These Are Days (3:42)
     ≠ (#0) Eden (4:09) -> (#3) Eden (4:09)
     ≠ (#0) Few_and_Far_Between (3:16) -> (#4) Few and Far Between (3:16)
     ≠ (#0) Stockton_Gala_Days (4:22) -> (#5) Stockton Gala Days (4:22)
     ≠ (#0) Gold_Rush_Brides (3:25) -> (#6) Gold Rush Brides (3:25)
     ≠ (#0) Jezebel (4:02) -> (#7) Jezebel (4:02)
     ≠ (#0) How_You’ve_Grown (3:41) -> (#8) How You’ve Grown (3:41)
     ≠ (#0) Candy_Everybody_Wants (3:08) -> (#9) Candy Everybody Wants (3:08)
     ≠ (#0) Tolerance (4:16) -> (#10) Tolerance (4:16)
     ≠ (#0) Circle_Dream (3:27) -> (#11) Circle Dream (3:27)
     ≠ (#0) If_You_Intend (3:05) -> (#12) If You Intend (3:05)
     ≠ (#0) I’m_Not_the_Man (3:25) -> (#13) I’m Not the Man (3:25)
➜ [A]pply, More candidates, Skip, Use as-is, as Tracks, Group albums,
Enter search, enter Id, aBort? A

This fills in the indicated tracks with track number metadata.

I'd like to script this. I have the names of folders whose tracks don't have metadata, and I can easily loop through them in a script to feed each one into Beets. The problem is that, using the procedure shown above, I have to enter information manually: the artist, the album name, and the A option to apply the result. Is there a way for Beets to automate this from the command line or from a script (Bash or Python, whichever's easiest)?

[DjSlash]

You can provide id's on the cli with --search-id where search_id is an musicbrainz release url.

If you already have a metadata backend ID that matches the items to be imported, you can instruct beets to restrict the search to that ID instead of searching for other candidates by using the --search-id SEARCH_ID option. Multiple IDs can be specified by simply repeating the option several times.

Another chance to get better matches is following the directions that are given in the documentation linked in the output that you got about nomatch. I.e. use the from_filename plugin for example.