match.current_metadata -> util.get_most_common_tags

beets/autotag/__init__.py

@@ -24,13 +24,7 @@ from beets.library import Album, Item, LibModel
 from beets.util import unique_list
 
 from .hooks import AlbumInfo, AlbumMatch, Distance, TrackInfo, TrackMatch
-from .match import (
-    Proposal,
-    Recommendation,
-    current_metadata,
-    tag_album,
-    tag_item,
-)
+from .match import Proposal, Recommendation, tag_album, tag_item
 
 __all__ = [
     "AlbumInfo",
@@ -43,7 +37,6 @@ __all__ = [
     "apply_album_metadata",
     "apply_item_metadata",
     "apply_metadata",
-    "current_metadata",
     "tag_album",
     "tag_item",
 ]

beets/autotag/match.py

@@ -36,7 +36,7 @@ from beets.autotag import (
     TrackMatch,
     hooks,
 )
-from beets.util import plurality
+from beets.util import get_most_common_tags
 
 if TYPE_CHECKING:
     from collections.abc import Iterable, Sequence
@@ -80,44 +80,6 @@ class Proposal(NamedTuple):
 # Primary matching functionality.
 
 
-def current_metadata(
-    items: Iterable[Item],
-) -> tuple[dict[str, Any], dict[str, Any]]:
-    """Extract the likely current metadata for an album given a list of its
-    items. Return two dictionaries:
-     - The most common value for each field.
-     - Whether each field's value was unanimous (values are booleans).
-    """
-    assert items  # Must be nonempty.
-
-    likelies = {}
-    consensus = {}
-    fields = [
-        "artist",
-        "album",
-        "albumartist",
-        "year",
-        "disctotal",
-        "mb_albumid",
-        "label",
-        "barcode",
-        "catalognum",
-        "country",
-        "media",
-        "albumdisambig",
-    ]
-    for field in fields:
-        values = [item[field] for item in items if item]
-        likelies[field], freq = plurality(values)
-        consensus[field] = freq == len(values)
-
-    # If there's an album artist consensus, use this for the artist.
-    if consensus["albumartist"] and likelies["albumartist"]:
-        likelies["artist"] = likelies["albumartist"]
-
-    return likelies, consensus
-
-
 def assign_items(
     items: Sequence[Item],
     tracks: Sequence[TrackInfo],
@@ -231,7 +193,7 @@ def distance(
     keys are a subset of `items` and the values are a subset of
     `album_info.tracks`.
     """
-    likelies, _ = current_metadata(items)
+    likelies, _ = get_most_common_tags(items)
 
     dist = hooks.Distance()
 
@@ -499,7 +461,7 @@ def tag_album(
     candidates.
     """
     # Get current metadata.
-    likelies, consensus = current_metadata(items)
+    likelies, consensus = get_most_common_tags(items)
     cur_artist: str = likelies["artist"]
     cur_album: str = likelies["album"]
     log.debug("Tagging {0} - {1}", cur_artist, cur_album)

beets/importer/tasks.py

@@ -228,7 +228,7 @@ class ImportTask(BaseImportTask):
         or APPLY (in which case the data comes from the choice).
         """
         if self.choice_flag in (Action.ASIS, Action.RETAG):
-            likelies, consensus = autotag.current_metadata(self.items)
+            likelies, consensus = util.get_most_common_tags(self.items)
             return likelies
         elif self.choice_flag is Action.APPLY and self.match:
             return self.match.info.copy()

beets/util/__init__.py

@@ -56,6 +56,8 @@ if TYPE_CHECKING:
     from collections.abc import Iterator, Sequence
     from logging import Logger
 
+    from beets.library import Item
+
 if sys.version_info >= (3, 10):
     from typing import TypeAlias
 else:
@@ -814,6 +816,44 @@ def plurality(objs: Iterable[T]) -> tuple[T, int]:
     return c.most_common(1)[0]
 
 
+def get_most_common_tags(
+    items: Sequence[Item],
+) -> tuple[dict[str, Any], dict[str, Any]]:
+    """Extract the likely current metadata for an album given a list of its
+    items. Return two dictionaries:
+     - The most common value for each field.
+     - Whether each field's value was unanimous (values are booleans).
+    """
+    assert items  # Must be nonempty.
+
+    likelies = {}
+    consensus = {}
+    fields = [
+        "artist",
+        "album",
+        "albumartist",
+        "year",
+        "disctotal",
+        "mb_albumid",
+        "label",
+        "barcode",
+        "catalognum",
+        "country",
+        "media",
+        "albumdisambig",
+    ]
+    for field in fields:
+        values = [item[field] for item in items if item]
+        likelies[field], freq = plurality(values)
+        consensus[field] = freq == len(values)
+
+    # If there's an album artist consensus, use this for the artist.
+    if consensus["albumartist"] and likelies["albumartist"]:
+        likelies["artist"] = likelies["albumartist"]
+
+    return likelies, consensus
+
+
 # stdout and stderr as bytes
 class CommandOutput(NamedTuple):
     stdout: bytes

test/test_autotag.py

@@ -24,86 +24,6 @@ from beets.autotag import AlbumInfo, TrackInfo, correct_list_fields, match
 from beets.autotag.hooks import Distance, string_dist
 from beets.library import Item
 from beets.test.helper import BeetsTestCase, ConfigMixin
-from beets.util import plurality
-
-
-class PluralityTest(BeetsTestCase):
-    def test_plurality_consensus(self):
-        objs = [1, 1, 1, 1]
-        obj, freq = plurality(objs)
-        assert obj == 1
-        assert freq == 4
-
-    def test_plurality_near_consensus(self):
-        objs = [1, 1, 2, 1]
-        obj, freq = plurality(objs)
-        assert obj == 1
-        assert freq == 3
-
-    def test_plurality_conflict(self):
-        objs = [1, 1, 2, 2, 3]
-        obj, freq = plurality(objs)
-        assert obj in (1, 2)
-        assert freq == 2
-
-    def test_plurality_empty_sequence_raises_error(self):
-        with pytest.raises(ValueError, match="must be non-empty"):
-            plurality([])
-
-    def test_current_metadata_finds_pluralities(self):
-        items = [
-            Item(artist="The Beetles", album="The White Album"),
-            Item(artist="The Beatles", album="The White Album"),
-            Item(artist="The Beatles", album="Teh White Album"),
-        ]
-        likelies, consensus = match.current_metadata(items)
-        assert likelies["artist"] == "The Beatles"
-        assert likelies["album"] == "The White Album"
-        assert not consensus["artist"]
-
-    def test_current_metadata_artist_consensus(self):
-        items = [
-            Item(artist="The Beatles", album="The White Album"),
-            Item(artist="The Beatles", album="The White Album"),
-            Item(artist="The Beatles", album="Teh White Album"),
-        ]
-        likelies, consensus = match.current_metadata(items)
-        assert likelies["artist"] == "The Beatles"
-        assert likelies["album"] == "The White Album"
-        assert consensus["artist"]
-
-    def test_albumartist_consensus(self):
-        items = [
-            Item(artist="tartist1", album="album", albumartist="aartist"),
-            Item(artist="tartist2", album="album", albumartist="aartist"),
-            Item(artist="tartist3", album="album", albumartist="aartist"),
-        ]
-        likelies, consensus = match.current_metadata(items)
-        assert likelies["artist"] == "aartist"
-        assert not consensus["artist"]
-
-    def test_current_metadata_likelies(self):
-        fields = [
-            "artist",
-            "album",
-            "albumartist",
-            "year",
-            "disctotal",
-            "mb_albumid",
-            "label",
-            "barcode",
-            "catalognum",
-            "country",
-            "media",
-            "albumdisambig",
-        ]
-        items = [Item(**{f: f"{f}_{i or 1}" for f in fields}) for i in range(5)]
-        likelies, _ = match.current_metadata(items)
-        for f in fields:
-            if isinstance(likelies[f], int):
-                assert likelies[f] == 0
-            else:
-                assert likelies[f] == f"{f}_1"
 
 
 def _make_item(title, track, artist="some artist"):

test/test_util.py

@@ -24,7 +24,10 @@ from unittest.mock import Mock, patch
 import pytest
 
 from beets import util
+from beets.library import Item
 from beets.test import _common
+from beets.test.helper import BeetsTestCase
+from beets.util import plurality
 
 
 class UtilTest(unittest.TestCase):
@@ -217,3 +220,82 @@ class TestPathLegalization:
             expected_path,
             expected_truncated,
         )
+
+
+class PluralityTest(BeetsTestCase):
+    def test_plurality_consensus(self):
+        objs = [1, 1, 1, 1]
+        obj, freq = plurality(objs)
+        assert obj == 1
+        assert freq == 4
+
+    def test_plurality_near_consensus(self):
+        objs = [1, 1, 2, 1]
+        obj, freq = plurality(objs)
+        assert obj == 1
+        assert freq == 3
+
+    def test_plurality_conflict(self):
+        objs = [1, 1, 2, 2, 3]
+        obj, freq = plurality(objs)
+        assert obj in (1, 2)
+        assert freq == 2
+
+    def test_plurality_empty_sequence_raises_error(self):
+        with pytest.raises(ValueError, match="must be non-empty"):
+            plurality([])
+
+    def test_current_metadata_finds_pluralities(self):
+        items = [
+            Item(artist="The Beetles", album="The White Album"),
+            Item(artist="The Beatles", album="The White Album"),
+            Item(artist="The Beatles", album="Teh White Album"),
+        ]
+        likelies, consensus = util.get_most_common_tags(items)
+        assert likelies["artist"] == "The Beatles"
+        assert likelies["album"] == "The White Album"
+        assert not consensus["artist"]
+
+    def test_current_metadata_artist_consensus(self):
+        items = [
+            Item(artist="The Beatles", album="The White Album"),
+            Item(artist="The Beatles", album="The White Album"),
+            Item(artist="The Beatles", album="Teh White Album"),
+        ]
+        likelies, consensus = util.get_most_common_tags(items)
+        assert likelies["artist"] == "The Beatles"
+        assert likelies["album"] == "The White Album"
+        assert consensus["artist"]
+
+    def test_albumartist_consensus(self):
+        items = [
+            Item(artist="tartist1", album="album", albumartist="aartist"),
+            Item(artist="tartist2", album="album", albumartist="aartist"),
+            Item(artist="tartist3", album="album", albumartist="aartist"),
+        ]
+        likelies, consensus = util.get_most_common_tags(items)
+        assert likelies["artist"] == "aartist"
+        assert not consensus["artist"]
+
+    def test_current_metadata_likelies(self):
+        fields = [
+            "artist",
+            "album",
+            "albumartist",
+            "year",
+            "disctotal",
+            "mb_albumid",
+            "label",
+            "barcode",
+            "catalognum",
+            "country",
+            "media",
+            "albumdisambig",
+        ]
+        items = [Item(**{f: f"{f}_{i or 1}" for f in fields}) for i in range(5)]
+        likelies, _ = util.get_most_common_tags(items)
+        for f in fields:
+            if isinstance(likelies[f], int):
+                assert likelies[f] == 0
+            else:
+                assert likelies[f] == f"{f}_1"