retry network errors and raise request timeout

Медленная/нестабильная сеть до api.music.yandex.net роняла весь процесс
при первом же таймауте (5с по умолчанию у библиотеки). Добавлен
with_retries с экспоненциальной паузой на всех сетевых точках входа
(fetch, language, genres, apply, client.init), таймаут запроса поднят
до 20с (настраивается в config.toml). Заодно поправлен скрытый баг:
language.py раньше кэшировал таймаут как "текста нет" навсегда -
теперь только настоящий NotFoundError трактуется так.

config.toml

@@ -3,6 +3,8 @@
 fetch_batch_delay = 0.4
 lyrics_request_delay = 0.25
 apply_request_delay = 0.3
+# Таймаут одного запроса, секунды (библиотека по умолчанию ставит 5 - мало при медленной сети)
+request_timeout = 20
 
 [fetch]
 # Сколько id треков в одном батч-запросе client.tracks(...)

sort_ym/apply.py

@@ -4,14 +4,16 @@ import time
 
 from yandex_music import Client, Playlist
 
+from .ymclient import with_retries
+
 
 def _existing_playlists_by_title(client: Client) -> dict[str, Playlist]:
-    playlists = client.users_playlists_list()
+    playlists = with_retries(lambda: client.users_playlists_list())
     return {p.title: p for p in playlists if p.title}
 
 
 def _existing_track_ids(client: Client, playlist: Playlist) -> set[str]:
-    full = client.users_playlists(playlist.kind)
+    full = with_retries(lambda: client.users_playlists(playlist.kind))
     if full is None:
         return set()
     return {t.track_id for t in full.tracks}
@@ -20,7 +22,7 @@ def _existing_track_ids(client: Client, playlist: Playlist) -> set[str]:
 def _get_or_create_playlist(client: Client, title: str, existing: dict[str, Playlist]) -> Playlist:
     if title in existing:
         return existing[title]
-    playlist = client.users_playlists_create(title, visibility="private")
+    playlist = with_retries(lambda: client.users_playlists_create(title, visibility="private"))
     existing[title] = playlist
     return playlist
 
@@ -51,11 +53,13 @@ def apply_classification(
             if track_key in already:
                 continue
 
-            updated = client.users_playlists_insert_track(
-                playlist.kind,
-                row["id"],
-                row["album_id"],
-                revision=revision,
+            updated = with_retries(
+                lambda: client.users_playlists_insert_track(
+                    playlist.kind,
+                    row["id"],
+                    row["album_id"],
+                    revision=revision,
+                )
             )
             if updated is not None and updated.revision is not None:
                 revision = updated.revision

sort_ym/cli.py

@@ -15,13 +15,13 @@ def cmd_auth(args: argparse.Namespace) -> None:
 
 def cmd_fetch(args: argparse.Namespace) -> None:
     cfg = load_config()
-    client = make_client(auth.get_token(cfg.token_file))
+    client = make_client(auth.get_token(cfg.token_file), cfg.request_timeout)
     fetch.fetch_liked_tracks(client, cfg.cache_dir, cfg.batch_size, cfg.fetch_batch_delay)
 
 
 def cmd_report(args: argparse.Namespace) -> None:
     cfg = load_config()
-    client = make_client(auth.get_token(cfg.token_file))
+    client = make_client(auth.get_token(cfg.token_file), cfg.request_timeout)
 
     tracks_cache = fetch.load_tracks_cache(cfg.cache_dir)
     if not tracks_cache:
@@ -53,7 +53,7 @@ def cmd_apply(args: argparse.Namespace) -> None:
         raise SystemExit("Это изменит ваш аккаунт. Добавьте флаг --yes для подтверждения.")
 
     cfg = load_config()
-    client = make_client(auth.get_token(cfg.token_file))
+    client = make_client(auth.get_token(cfg.token_file), cfg.request_timeout)
 
     tracks_cache = fetch.load_tracks_cache(cfg.cache_dir)
     if not tracks_cache:

sort_ym/config.py

@@ -12,6 +12,7 @@ class Config:
     fetch_batch_delay: float
     lyrics_request_delay: float
     apply_request_delay: float
+    request_timeout: float
     batch_size: int
     token_file: Path
     cache_dir: Path
@@ -27,6 +28,7 @@ def load_config(path: Path | None = None) -> Config:
         fetch_batch_delay=data["throttle"]["fetch_batch_delay"],
         lyrics_request_delay=data["throttle"]["lyrics_request_delay"],
         apply_request_delay=data["throttle"]["apply_request_delay"],
+        request_timeout=data["throttle"]["request_timeout"],
         batch_size=data["fetch"]["batch_size"],
         token_file=ROOT / data["paths"]["token_file"],
         cache_dir=ROOT / data["paths"]["cache_dir"],

sort_ym/fetch.py

@@ -6,7 +6,7 @@ from pathlib import Path
 
 from yandex_music import Client, Track
 
-from .ymclient import chunked
+from .ymclient import chunked, with_retries
 
 TRACKS_CACHE_FILE = "tracks.json"
 
@@ -53,7 +53,7 @@ def fetch_liked_tracks(
     cache_file = cache_dir / TRACKS_CACHE_FILE
     cache = load_tracks_cache(cache_dir)
 
-    likes = client.users_likes_tracks()
+    likes = with_retries(lambda: client.users_likes_tracks())
     if likes is None:
         print("Не удалось получить список лайкнутых треков.")
         return cache
@@ -64,7 +64,7 @@ def fetch_liked_tracks(
     print(f"Лайкнутых треков: {len(all_ids)}, новых для загрузки: {len(missing_ids)}")
 
     for batch in chunked(missing_ids, batch_size):
-        tracks = client.tracks(batch)
+        tracks = with_retries(lambda: client.tracks(batch))
         for track in tracks:
             cache[track.track_id] = _serialize(track)
         _atomic_write_json(cache_file, cache)

sort_ym/genres.py

@@ -5,6 +5,8 @@ from pathlib import Path
 
 from yandex_music import Client, Genre
 
+from .ymclient import with_retries
+
 GENRE_CATALOG_FILE = "genre_catalog.json"
 
 # Корневые жанры каталога Яндекс.Музыки -> наши крупные корзины.
@@ -83,7 +85,7 @@ def load_or_fetch_catalog(client: Client, cache_dir: Path) -> dict[str, dict]:
     if cache_file.exists():
         return json.loads(cache_file.read_text(encoding="utf-8"))
 
-    roots = client.genres()
+    roots = with_retries(lambda: client.genres())
     flat = flatten_catalog(roots)
     cache_file.write_text(json.dumps(flat, ensure_ascii=False, indent=2), encoding="utf-8")
     return flat

sort_ym/language.py

@@ -6,7 +6,9 @@ import unicodedata
 from pathlib import Path
 
 from yandex_music import Client
-from yandex_music.exceptions import YandexMusicError
+from yandex_music.exceptions import NotFoundError
+
+from .ymclient import with_retries
 
 LYRICS_LANG_CACHE_FILE = "lyrics_lang.json"
 
@@ -99,8 +101,8 @@ def load_lang_cache(cache_dir: Path) -> dict[str, str | None]:
 
 def _fetch_one_language(client: Client, track_id: str) -> str | None:
     try:
-        supplement = client.track_supplement(track_id)
-    except YandexMusicError:
+        supplement = with_retries(lambda: client.track_supplement(track_id))
+    except NotFoundError:
         return None
     if supplement is None or supplement.lyrics is None:
         return None

sort_ym/ymclient.py

@@ -1,18 +1,44 @@
 from __future__ import annotations
 
-from typing import Iterator, List, TypeVar
+import time
+from typing import Callable, Iterator, List, TypeVar
 
 from yandex_music import Client
+from yandex_music.exceptions import NetworkError, NotFoundError
 
 T = TypeVar("T")
 
 
-def make_client(token: str) -> Client:
+def make_client(token: str, request_timeout: float = 20) -> Client:
     client = Client(token=token)
-    client.init()
+    client.request.set_timeout(request_timeout)
+    with_retries(lambda: client.init())
     return client
 
 
 def chunked(items: List[T], size: int) -> Iterator[List[T]]:
     for i in range(0, len(items), size):
         yield items[i : i + size]
+
+
+def with_retries(fn: Callable[[], T], max_attempts: int = 4, base_delay: float = 2.0) -> T:
+    """Повторяет вызов при временных сетевых сбоях (таймауты и т.п.) с экспоненциальной паузой.
+
+    NotFoundError не повторяется - это окончательный ответ API, а не сбой сети,
+    хотя формально он тоже унаследован от NetworkError.
+    """
+    last_exc: NetworkError | None = None
+    for attempt in range(max_attempts):
+        try:
+            return fn()
+        except NotFoundError:
+            raise
+        except NetworkError as e:
+            last_exc = e
+            if attempt < max_attempts - 1:
+                wait = base_delay * (2**attempt)
+                print(f"  сетевая ошибка ({e}), повтор через {wait:.0f}с...")
+                time.sleep(wait)
+
+    assert last_exc is not None
+    raise last_exc