server: lint

42 files changed, 192 insertions, 169 deletions

diff --git a/server/szurubooru/api/comment_api.py b/server/szurubooru/api/comment_api.py
index 1cde538..cc8350a 100644
--- a/server/szurubooru/api/comment_api.py
+++ b/server/szurubooru/api/comment_api.py
@@ -27,7 +27,7 @@ def _serialize(
 
 @rest.routes.get('/comments/?')
 def get_comments(
-        ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     auth.verify_privilege(ctx.user, 'comments:list')
     return _search_executor.execute_and_serialize(
         ctx, lambda comment: _serialize(ctx, comment))
@@ -35,7 +35,7 @@ def get_comments(
 
 @rest.routes.post('/comments/?')
 def create_comment(
-        ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     auth.verify_privilege(ctx.user, 'comments:create')
     text = ctx.get_param_as_string('text')
     post_id = ctx.get_param_as_int('postId')
diff --git a/server/szurubooru/api/info_api.py b/server/szurubooru/api/info_api.py
index e0fafed..97bfa39 100644
--- a/server/szurubooru/api/info_api.py
+++ b/server/szurubooru/api/info_api.py
@@ -28,7 +28,7 @@ def _get_disk_usage() -> int:
 
 @rest.routes.get('/info/?')
 def get_info(
-        ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     post_feature = posts.try_get_current_post_feature()
     return {
         'postCount': posts.get_post_count(),
diff --git a/server/szurubooru/api/password_reset_api.py b/server/szurubooru/api/password_reset_api.py
index da3effd..032dce4 100644
--- a/server/szurubooru/api/password_reset_api.py
+++ b/server/szurubooru/api/password_reset_api.py
@@ -5,10 +5,10 @@ from hashlib import md5
 
 
 MAIL_SUBJECT = 'Password reset for {name}'
-MAIL_BODY = \
-    'You (or someone else) requested to reset your password on {name}.\n' \
-    'If you wish to proceed, click this link: {url}\n' \
-    'Otherwise, please ignore this email.'
+MAIL_BODY = (
+    'You (or someone else) requested to reset your password on {name}.\n'
+    'If you wish to proceed, click this link: {url}\n'
+    'Otherwise, please ignore this email.')
 
 
 @rest.routes.get('/password-reset/(?P<user_name>[^/]+)/?')
diff --git a/server/szurubooru/api/post_api.py b/server/szurubooru/api/post_api.py
index 4b364ec..234677e 100644
--- a/server/szurubooru/api/post_api.py
+++ b/server/szurubooru/api/post_api.py
@@ -31,7 +31,7 @@ def _serialize_post(
 
 @rest.routes.get('/posts/?')
 def get_posts(
-        ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     auth.verify_privilege(ctx.user, 'posts:list')
     _search_executor_config.user = ctx.user
     return _search_executor.execute_and_serialize(
@@ -40,7 +40,7 @@ def get_posts(
 
 @rest.routes.post('/posts/?')
 def create_post(
-        ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     anonymous = ctx.get_param_as_bool('anonymous', default=False)
     if anonymous:
         auth.verify_privilege(ctx.user, 'posts:create:anonymous')
@@ -144,7 +144,7 @@ def delete_post(ctx: rest.Context, params: Dict[str, str]) -> rest.Response:
 
 @rest.routes.post('/post-merge/?')
 def merge_posts(
-        ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     source_post_id = ctx.get_param_as_int('remove')
     target_post_id = ctx.get_param_as_int('mergeTo')
     source_post = posts.get_post_by_id(source_post_id)
@@ -162,14 +162,14 @@ def merge_posts(
 
 @rest.routes.get('/featured-post/?')
 def get_featured_post(
-        ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     post = posts.try_get_featured_post()
     return _serialize_post(ctx, post)
 
 
 @rest.routes.post('/featured-post/?')
 def set_featured_post(
-        ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     auth.verify_privilege(ctx.user, 'posts:feature')
     post_id = ctx.get_param_as_int('id')
     post = posts.get_post_by_id(post_id)
@@ -235,7 +235,7 @@ def get_posts_around(
 
 @rest.routes.post('/posts/reverse-search/?')
 def get_posts_by_image(
-        ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     auth.verify_privilege(ctx.user, 'posts:reverse_search')
     content = ctx.get_file('content')
 
diff --git a/server/szurubooru/api/snapshot_api.py b/server/szurubooru/api/snapshot_api.py
index cdcee74..469be7f 100644
--- a/server/szurubooru/api/snapshot_api.py
+++ b/server/szurubooru/api/snapshot_api.py
@@ -8,7 +8,7 @@ _search_executor = search.Executor(search.configs.SnapshotSearchConfig())
 
 @rest.routes.get('/snapshots/?')
 def get_snapshots(
-        ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     auth.verify_privilege(ctx.user, 'snapshots:list')
     return _search_executor.execute_and_serialize(
         ctx, lambda snapshot: snapshots.serialize_snapshot(snapshot, ctx.user))
diff --git a/server/szurubooru/api/tag_api.py b/server/szurubooru/api/tag_api.py
index 8e1afbd..f02f803 100644
--- a/server/szurubooru/api/tag_api.py
+++ b/server/szurubooru/api/tag_api.py
@@ -28,14 +28,15 @@ def _create_if_needed(tag_names: List[str], user: model.User) -> None:
 
 
 @rest.routes.get('/tags/?')
-def get_tags(ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+def get_tags(ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     auth.verify_privilege(ctx.user, 'tags:list')
     return _search_executor.execute_and_serialize(
         ctx, lambda tag: _serialize(ctx, tag))
 
 
 @rest.routes.post('/tags/?')
-def create_tag(ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+def create_tag(
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     auth.verify_privilege(ctx.user, 'tags:create')
 
     names = ctx.get_param_as_string_list('names')
@@ -112,7 +113,7 @@ def delete_tag(ctx: rest.Context, params: Dict[str, str]) -> rest.Response:
 
 @rest.routes.post('/tag-merge/?')
 def merge_tags(
-        ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     source_tag_name = ctx.get_param_as_string('remove')
     target_tag_name = ctx.get_param_as_string('mergeTo')
     source_tag = tags.get_tag_by_name(source_tag_name)
diff --git a/server/szurubooru/api/tag_category_api.py b/server/szurubooru/api/tag_category_api.py
index c7aaca8..63c0559 100644
--- a/server/szurubooru/api/tag_category_api.py
+++ b/server/szurubooru/api/tag_category_api.py
@@ -12,7 +12,7 @@ def _serialize(
 
 @rest.routes.get('/tag-categories/?')
 def get_tag_categories(
-        ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     auth.verify_privilege(ctx.user, 'tag_categories:list')
     categories = tag_categories.get_all_categories()
     return {
@@ -22,7 +22,7 @@ def get_tag_categories(
 
 @rest.routes.post('/tag-categories/?')
 def create_tag_category(
-        ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     auth.verify_privilege(ctx.user, 'tag_categories:create')
     name = ctx.get_param_as_string('name')
     color = ctx.get_param_as_string('color')
diff --git a/server/szurubooru/api/upload_api.py b/server/szurubooru/api/upload_api.py
index 9200eaa..6a6ecfe 100644
--- a/server/szurubooru/api/upload_api.py
+++ b/server/szurubooru/api/upload_api.py
@@ -5,7 +5,7 @@ from szurubooru.func import auth, file_uploads
 
 @rest.routes.post('/uploads/?')
 def create_temporary_file(
-        ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     auth.verify_privilege(ctx.user, 'uploads:create')
     content = ctx.get_file('content', allow_tokens=False)
     token = file_uploads.save(content)
diff --git a/server/szurubooru/api/user_api.py b/server/szurubooru/api/user_api.py
index 910f2a4..e456f22 100644
--- a/server/szurubooru/api/user_api.py
+++ b/server/szurubooru/api/user_api.py
@@ -16,7 +16,8 @@ def _serialize(
 
 
 @rest.routes.get('/users/?')
-def get_users(ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+def get_users(
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     auth.verify_privilege(ctx.user, 'users:list')
     return _search_executor.execute_and_serialize(
         ctx, lambda user: _serialize(ctx, user))
@@ -24,7 +25,7 @@ def get_users(ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
 
 @rest.routes.post('/users/?')
 def create_user(
-        ctx: rest.Context, _params: Dict[str, str]={}) -> rest.Response:
+        ctx: rest.Context, _params: Dict[str, str] = {}) -> rest.Response:
     auth.verify_privilege(ctx.user, 'users:create')
     name = ctx.get_param_as_string('name')
     password = ctx.get_param_as_string('password')
diff --git a/server/szurubooru/errors.py b/server/szurubooru/errors.py
index b5f1cc3..beeb469 100644
--- a/server/szurubooru/errors.py
+++ b/server/szurubooru/errors.py
@@ -4,8 +4,8 @@ from typing import Dict
 class BaseError(RuntimeError):
     def __init__(
             self,
-            message: str='Unknown error',
-            extra_fields: Dict[str, str]=None) -> None:
+            message: str = 'Unknown error',
+            extra_fields: Dict[str, str] = None) -> None:
         super().__init__(message)
         self.extra_fields = extra_fields
 
diff --git a/server/szurubooru/func/cache.py b/server/szurubooru/func/cache.py
index 345835c..01e4659 100644
--- a/server/szurubooru/func/cache.py
+++ b/server/szurubooru/func/cache.py
@@ -21,9 +21,9 @@ class LruCache:
                 i
                 for i, v in enumerate(self.item_list)
                 if v.key == item.key)
-            self.item_list[:] \
-                = self.item_list[:item_index] \
-                + self.item_list[item_index + 1:]
+            self.item_list[:] = (
+                self.item_list[:item_index] +
+                self.item_list[item_index + 1:])
             self.item_list.insert(0, item)
         else:
             if len(self.item_list) > self.length:
diff --git a/server/szurubooru/func/comments.py b/server/szurubooru/func/comments.py
index fe15d8b..9f88283 100644
--- a/server/szurubooru/func/comments.py
+++ b/server/szurubooru/func/comments.py
@@ -1,7 +1,7 @@
 from datetime import datetime
 from typing import Any, Optional, List, Dict, Callable
 from szurubooru import db, model, errors, rest
-from szurubooru.func import users, scores, util, serialization
+from szurubooru.func import users, scores, serialization
 
 
 class InvalidCommentIdError(errors.ValidationError):
@@ -65,7 +65,7 @@ class CommentSerializer(serialization.BaseSerializer):
 def serialize_comment(
         comment: model.Comment,
         auth_user: model.User,
-        options: List[str]=[]) -> rest.Response:
+        options: List[str] = []) -> rest.Response:
     if comment is None:
         return None
     return CommentSerializer(comment, auth_user).serialize(options)
@@ -73,10 +73,11 @@ def serialize_comment(
 
 def try_get_comment_by_id(comment_id: int) -> Optional[model.Comment]:
     comment_id = int(comment_id)
-    return db.session \
-        .query(model.Comment) \
-        .filter(model.Comment.comment_id == comment_id) \
-        .one_or_none()
+    return (
+        db.session
+        .query(model.Comment)
+        .filter(model.Comment.comment_id == comment_id)
+        .one_or_none())
 
 
 def get_comment_by_id(comment_id: int) -> model.Comment:
diff --git a/server/szurubooru/func/image_hash.py b/server/szurubooru/func/image_hash.py
index dc998e8..dae8443 100644
--- a/server/szurubooru/func/image_hash.py
+++ b/server/szurubooru/func/image_hash.py
@@ -99,7 +99,7 @@ def _normalize_and_threshold(
 def _compute_grid_points(
         image: NpMatrix,
         n: float,
-        window: Window=None) -> Tuple[NpMatrix, NpMatrix]:
+        window: Window = None) -> Tuple[NpMatrix, NpMatrix]:
     if window is None:
         window = ((0, image.shape[0]), (0, image.shape[1]))
     x_coords = np.linspace(window[0][0], window[0][1], n + 2, dtype=int)[1:-1]
@@ -219,7 +219,7 @@ def _max_contrast(array: NpMatrix) -> None:
 def _normalized_distance(
         target_array: NpMatrix,
         vec: NpMatrix,
-        nan_value: float=1.0) -> List[float]:
+        nan_value: float = 1.0) -> List[float]:
     target_array = target_array.astype(int)
     vec = vec.astype(int)
     topvec = np.linalg.norm(vec - target_array, axis=1)
diff --git a/server/szurubooru/func/images.py b/server/szurubooru/func/images.py
index 103a6ff..1a6f946 100644
--- a/server/szurubooru/func/images.py
+++ b/server/szurubooru/func/images.py
@@ -11,8 +11,8 @@ from szurubooru.func import mime, util
 logger = logging.getLogger(__name__)
 
 
-_SCALE_FIT_FMT = \
-    r'scale=iw*max({width}/iw\,{height}/ih):ih*max({width}/iw\,{height}/ih)'
+_SCALE_FIT_FMT = (
+    r'scale=iw*max({width}/iw\,{height}/ih):ih*max({width}/iw\,{height}/ih)')
 
 
 class Image:
@@ -77,7 +77,7 @@ class Image:
             '-',
         ])
 
-    def _execute(self, cli: List[str], program: str='ffmpeg') -> bytes:
+    def _execute(self, cli: List[str], program: str = 'ffmpeg') -> bytes:
         extension = mime.get_extension(mime.get_mime_type(self.content))
         assert extension
         with util.create_temp_file(suffix='.' + extension) as handle:
diff --git a/server/szurubooru/func/posts.py b/server/szurubooru/func/posts.py
index fffefa9..27086f9 100644
--- a/server/szurubooru/func/posts.py
+++ b/server/szurubooru/func/posts.py
@@ -7,10 +7,10 @@ from szurubooru.func import (
     mime, images, files, image_hash, serialization)
 
 
-EMPTY_PIXEL = \
-    b'\x47\x49\x46\x38\x39\x61\x01\x00\x01\x00\x80\x01\x00\x00\x00\x00' \
-    b'\xff\xff\xff\x21\xf9\x04\x01\x00\x00\x01\x00\x2c\x00\x00\x00\x00' \
-    b'\x01\x00\x01\x00\x00\x02\x02\x4c\x01\x00\x3b'
+EMPTY_PIXEL = (
+    b'\x47\x49\x46\x38\x39\x61\x01\x00\x01\x00\x80\x01\x00\x00\x00\x00'
+    b'\xff\xff\xff\x21\xf9\x04\x01\x00\x00\x01\x00\x2c\x00\x00\x00\x00'
+    b'\x01\x00\x01\x00\x00\x02\x02\x4c\x01\x00\x3b')
 
 
 class PostNotFoundError(errors.NotFoundError):
@@ -283,7 +283,7 @@ class PostSerializer(serialization.BaseSerializer):
 def serialize_post(
         post: Optional[model.Post],
         auth_user: model.User,
-        options: List[str]=[]) -> Optional[rest.Response]:
+        options: List[str] = []) -> Optional[rest.Response]:
     if not post:
         return None
     return PostSerializer(post, auth_user).serialize(options)
@@ -300,10 +300,11 @@ def get_post_count() -> int:
 
 
 def try_get_post_by_id(post_id: int) -> Optional[model.Post]:
-    return db.session \
-        .query(model.Post) \
-        .filter(model.Post.post_id == post_id) \
-        .one_or_none()
+    return (
+        db.session
+        .query(model.Post)
+        .filter(model.Post.post_id == post_id)
+        .one_or_none())
 
 
 def get_post_by_id(post_id: int) -> model.Post:
@@ -314,10 +315,11 @@ def get_post_by_id(post_id: int) -> model.Post:
 
 
 def try_get_current_post_feature() -> Optional[model.PostFeature]:
-    return db.session \
-        .query(model.PostFeature) \
-        .order_by(model.PostFeature.time.desc()) \
-        .first()
+    return (
+        db.session
+        .query(model.PostFeature)
+        .order_by(model.PostFeature.time.desc())
+        .first())
 
 
 def try_get_featured_post() -> Optional[model.Post]:
@@ -426,11 +428,12 @@ def update_post_content(post: model.Post, content: Optional[bytes]) -> None:
             'Unhandled file type: %r' % post.mime_type)
 
     post.checksum = util.get_sha1(content)
-    other_post = db.session \
-        .query(model.Post) \
-        .filter(model.Post.checksum == post.checksum) \
-        .filter(model.Post.post_id != post.post_id) \
-        .one_or_none()
+    other_post = (
+        db.session
+        .query(model.Post)
+        .filter(model.Post.checksum == post.checksum)
+        .filter(model.Post.post_id != post.post_id)
+        .one_or_none())
     if other_post \
             and other_post.post_id \
             and other_post.post_id != post.post_id:
@@ -452,7 +455,7 @@ def update_post_content(post: model.Post, content: Optional[bytes]) -> None:
 
 
 def update_post_thumbnail(
-        post: model.Post, content: Optional[bytes]=None) -> None:
+        post: model.Post, content: Optional[bytes] = None) -> None:
     assert post
     setattr(post, '__thumbnail', content)
 
@@ -492,10 +495,11 @@ def update_post_relations(post: model.Post, new_post_ids: List[int]) -> None:
     old_posts = post.relations
     old_post_ids = [int(p.post_id) for p in old_posts]
     if new_post_ids:
-        new_posts = db.session \
-            .query(model.Post) \
-            .filter(model.Post.post_id.in_(new_post_ids)) \
-            .all()
+        new_posts = (
+            db.session
+            .query(model.Post)
+            .filter(model.Post.post_id.in_(new_post_ids))
+            .all())
     else:
         new_posts = []
     if len(new_posts) != len(new_post_ids):
@@ -673,10 +677,11 @@ def merge_posts(
 
 def search_by_image_exact(image_content: bytes) -> Optional[model.Post]:
     checksum = util.get_sha1(image_content)
-    return db.session \
-        .query(model.Post) \
-        .filter(model.Post.checksum == checksum) \
-        .one_or_none()
+    return (
+        db.session
+        .query(model.Post)
+        .filter(model.Post.checksum == checksum)
+        .one_or_none())
 
 
 def search_by_image(image_content: bytes) -> List[PostLookalike]:
diff --git a/server/szurubooru/func/scores.py b/server/szurubooru/func/scores.py
index fde279e..615fd98 100644
--- a/server/szurubooru/func/scores.py
+++ b/server/szurubooru/func/scores.py
@@ -39,11 +39,12 @@ def get_score(entity: model.Base, user: model.User) -> int:
     assert entity
     assert user
     table, get_column = _get_table_info(entity)
-    row = db.session \
-        .query(table.score) \
-        .filter(get_column(table) == get_column(entity)) \
-        .filter(table.user_id == user.user_id) \
-        .one_or_none()
+    row = (
+        db.session
+        .query(table.score)
+        .filter(get_column(table) == get_column(entity))
+        .filter(table.user_id == user.user_id)
+        .one_or_none())
     return row[0] if row else 0
 
 
diff --git a/server/szurubooru/func/serialization.py b/server/szurubooru/func/serialization.py
index df78959..699fb47 100644
--- a/server/szurubooru/func/serialization.py
+++ b/server/szurubooru/func/serialization.py
@@ -1,5 +1,5 @@
-from typing import Any, Optional, List, Dict, Callable
-from szurubooru import db, model, rest, errors
+from typing import Any, List, Dict, Callable
+from szurubooru import model, rest, errors
 
 
 def get_serialization_options(ctx: rest.Context) -> List[str]:
diff --git a/server/szurubooru/func/tag_categories.py b/server/szurubooru/func/tag_categories.py
index 41c9c92..bec2f0d 100644
--- a/server/szurubooru/func/tag_categories.py
+++ b/server/szurubooru/func/tag_categories.py
@@ -66,7 +66,7 @@ class TagCategorySerializer(serialization.BaseSerializer):
 
 def serialize_category(
         category: Optional[model.TagCategory],
-        options: List[str]=[]) -> Optional[rest.Response]:
+        options: List[str] = []) -> Optional[rest.Response]:
     if not category:
         return None
     return TagCategorySerializer(category).serialize(options)
@@ -113,16 +113,17 @@ def update_category_color(category: model.TagCategory, color: str) -> None:
 
 
 def try_get_category_by_name(
-        name: str, lock: bool=False) -> Optional[model.TagCategory]:
-    query = db.session \
-        .query(model.TagCategory) \
-        .filter(sa.func.lower(model.TagCategory.name) == name.lower())
+        name: str, lock: bool = False) -> Optional[model.TagCategory]:
+    query = (
+        db.session
+        .query(model.TagCategory)
+        .filter(sa.func.lower(model.TagCategory.name) == name.lower()))
     if lock:
         query = query.with_lockmode('update')
     return query.one_or_none()
 
 
-def get_category_by_name(name: str, lock: bool=False) -> model.TagCategory:
+def get_category_by_name(name: str, lock: bool = False) -> model.TagCategory:
     category = try_get_category_by_name(name, lock)
     if not category:
         raise TagCategoryNotFoundError('Tag category %r not found.' % name)
@@ -137,26 +138,29 @@ def get_all_categories() -> List[model.TagCategory]:
     return db.session.query(model.TagCategory).all()
 
 
-def try_get_default_category(lock: bool=False) -> Optional[model.TagCategory]:
-    query = db.session \
-        .query(model.TagCategory) \
-        .filter(model.TagCategory.default)
+def try_get_default_category(
+        lock: bool = False) -> Optional[model.TagCategory]:
+    query = (
+        db.session
+        .query(model.TagCategory)
+        .filter(model.TagCategory.default))
     if lock:
         query = query.with_lockmode('update')
     category = query.first()
     # if for some reason (e.g. as a result of migration) there's no default
     # category, get the first record available.
     if not category:
-        query = db.session \
-            .query(model.TagCategory) \
-            .order_by(model.TagCategory.tag_category_id.asc())
+        query = (
+            db.session
+            .query(model.TagCategory)
+            .order_by(model.TagCategory.tag_category_id.asc()))
         if lock:
             query = query.with_lockmode('update')
         category = query.first()
     return category
 
 
-def get_default_category(lock: bool=False) -> model.TagCategory:
+def get_default_category(lock: bool = False) -> model.TagCategory:
     category = try_get_default_category(lock)
     if not category:
         raise TagCategoryNotFoundError('No tag category created yet.')
diff --git a/server/szurubooru/func/tags.py b/server/szurubooru/func/tags.py
index 32abe94..55ee632 100644
--- a/server/szurubooru/func/tags.py
+++ b/server/szurubooru/func/tags.py
@@ -122,7 +122,7 @@ class TagSerializer(serialization.BaseSerializer):
 
 
 def serialize_tag(
-        tag: model.Tag, options: List[str]=[]) -> Optional[rest.Response]:
+        tag: model.Tag, options: List[str] = []) -> Optional[rest.Response]:
     if not tag:
         return None
     return TagSerializer(tag).serialize(options)
@@ -209,7 +209,8 @@ def get_tags_by_names(names: List[str]) -> List[model.Tag]:
     names = util.icase_unique(names)
     if len(names) == 0:
         return []
-    return (db.session.query(model.Tag)
+    return (
+        db.session.query(model.Tag)
         .join(model.TagName)
         .filter(
             sa.sql.or_(
diff --git a/server/szurubooru/func/users.py b/server/szurubooru/func/users.py
index fd0c624..ba6f67f 100644
--- a/server/szurubooru/func/users.py
+++ b/server/szurubooru/func/users.py
@@ -86,7 +86,7 @@ class UserSerializer(serialization.BaseSerializer):
             self,
             user: model.User,
             auth_user: model.User,
-            force_show_email: bool=False) -> None:
+            force_show_email: bool = False) -> None:
         self.user = user
         self.auth_user = auth_user
         self.force_show_email = force_show_email
@@ -151,8 +151,8 @@ class UserSerializer(serialization.BaseSerializer):
 def serialize_user(
         user: Optional[model.User],
         auth_user: model.User,
-        options: List[str]=[],
-        force_show_email: bool=False) -> Optional[rest.Response]:
+        options: List[str] = [],
+        force_show_email: bool = False) -> Optional[rest.Response]:
     if not user:
         return None
     return UserSerializer(user, auth_user, force_show_email).serialize(options)
@@ -170,10 +170,11 @@ def get_user_count() -> int:
 
 
 def try_get_user_by_name(name: str) -> Optional[model.User]:
-    return db.session \
-        .query(model.User) \
-        .filter(sa.func.lower(model.User.name) == sa.func.lower(name)) \
-        .one_or_none()
+    return (
+        db.session
+        .query(model.User)
+        .filter(sa.func.lower(model.User.name) == sa.func.lower(name))
+        .one_or_none())
 
 
 def get_user_by_name(name: str) -> model.User:
@@ -276,7 +277,7 @@ def update_user_rank(
 def update_user_avatar(
         user: model.User,
         avatar_style: str,
-        avatar_content: Optional[bytes]=None) -> None:
+        avatar_content: Optional[bytes] = None) -> None:
     assert user
     if avatar_style == 'gravatar':
         user.avatar_style = user.AVATAR_GRAVATAR
diff --git a/server/szurubooru/func/util.py b/server/szurubooru/func/util.py
index 40d19d3..61e975b 100644
--- a/server/szurubooru/func/util.py
+++ b/server/szurubooru/func/util.py
@@ -2,8 +2,7 @@ import os
 import hashlib
 import re
 import tempfile
-from typing import (
-    Any, Optional, Union, Tuple, List, Dict, Generator, Callable, TypeVar)
+from typing import Any, Optional, Union, Tuple, List, Dict, Generator, TypeVar
 from datetime import datetime, timedelta
 from contextlib import contextmanager
 from szurubooru import errors
diff --git a/server/szurubooru/func/versions.py b/server/szurubooru/func/versions.py
index 459b025..6e5a367 100644
--- a/server/szurubooru/func/versions.py
+++ b/server/szurubooru/func/versions.py
@@ -4,7 +4,7 @@ from szurubooru import errors, rest, model
 def verify_version(
         entity: model.Base,
         context: rest.Context,
-        field_name: str='version') -> None:
+        field_name: str = 'version') -> None:
     actual_version = context.get_param_as_int(field_name)
     expected_version = entity.version
     if actual_version != expected_version:
diff --git a/server/szurubooru/middleware/authenticator.py b/server/szurubooru/middleware/authenticator.py
index 2c5ac08..fa492f9 100644
--- a/server/szurubooru/middleware/authenticator.py
+++ b/server/szurubooru/middleware/authenticator.py
@@ -27,8 +27,9 @@ def _get_user(ctx: rest.Context) -> Optional[model.User]:
             credentials.encode('ascii')).decode('utf8').split(':')
         return _authenticate(username, password)
     except ValueError as err:
-        msg = 'Basic authentication header value are not properly formed. ' \
-            + 'Supplied header {0}. Got error: {1}'
+        msg = (
+            'Basic authentication header value are not properly formed. '
+            'Supplied header {0}. Got error: {1}')
         raise HttpBadRequest(
             'ValidationError',
             msg.format(ctx.get_header('Authorization'), str(err)))
diff --git a/server/szurubooru/migrations/versions/5f00af3004a4_add_default_tag_category.py b/server/szurubooru/migrations/versions/5f00af3004a4_add_default_tag_category.py
index d77dc37..e097e67 100644
--- a/server/szurubooru/migrations/versions/5f00af3004a4_add_default_tag_category.py
+++ b/server/szurubooru/migrations/versions/5f00af3004a4_add_default_tag_category.py
@@ -50,13 +50,14 @@ def upgrade():
 
 def downgrade():
     session = sa.orm.session.Session(bind=op.get_bind())
-    default_category = session \
-        .query(TagCategory) \
-        .filter(TagCategory.name == 'default') \
-        .filter(TagCategory.color == 'default') \
-        .filter(TagCategory.version == 1) \
-        .filter(TagCategory.default == True) \
-        .one_or_none()
+    default_category = (
+        session
+        .query(TagCategory)
+        .filter(TagCategory.name == 'default')
+        .filter(TagCategory.color == 'default')
+        .filter(TagCategory.version == 1)
+        .filter(TagCategory.default == 1)
+        .one_or_none())
     if default_category:
         session.delete(default_category)
     session.commit()
diff --git a/server/szurubooru/model/post.py b/server/szurubooru/model/post.py
index a3af237..f04ffb5 100644
--- a/server/szurubooru/model/post.py
+++ b/server/szurubooru/model/post.py
@@ -211,10 +211,11 @@ class Post(Base):
 
     @property
     def is_featured(self) -> bool:
-        featured_post = sa.orm.object_session(self) \
-            .query(PostFeature) \
-            .order_by(PostFeature.time.desc()) \
-            .first()
+        featured_post = (
+            sa.orm.object_session(self)
+            .query(PostFeature)
+            .order_by(PostFeature.time.desc())
+            .first())
         return featured_post and featured_post.post_id == self.post_id
 
     score = sa.orm.column_property(
diff --git a/server/szurubooru/model/tag_category.py b/server/szurubooru/model/tag_category.py
index 865cda9..2c961ed 100644
--- a/server/szurubooru/model/tag_category.py
+++ b/server/szurubooru/model/tag_category.py
@@ -14,7 +14,7 @@ class TagCategory(Base):
         'color', sa.Unicode(32), nullable=False, default='#000000')
     default = sa.Column('default', sa.Boolean, nullable=False, default=False)
 
-    def __init__(self, name: Optional[str]=None) -> None:
+    def __init__(self, name: Optional[str] = None) -> None:
         self.name = name
 
     tag_count = sa.orm.column_property(
diff --git a/server/szurubooru/rest/context.py b/server/szurubooru/rest/context.py
index 0f618ad..6236754 100644
--- a/server/szurubooru/rest/context.py
+++ b/server/szurubooru/rest/context.py
@@ -13,9 +13,9 @@ class Context:
             self,
             method: str,
             url: str,
-            headers: Dict[str, str]=None,
-            params: Request=None,
-            files: Dict[str, bytes]=None) -> None:
+            headers: Dict[str, str] = None,
+            params: Request = None,
+            files: Dict[str, bytes] = None) -> None:
         self.method = method
         self.url = url
         self._headers = headers or {}
@@ -34,7 +34,7 @@ class Context:
     def get_header(self, name: str) -> str:
         return self._headers.get(name, '')
 
-    def has_file(self, name: str, allow_tokens: bool=True) -> bool:
+    def has_file(self, name: str, allow_tokens: bool = True) -> bool:
         return (
             name in self._files or
             name + 'Url' in self._params or
@@ -43,8 +43,8 @@ class Context:
     def get_file(
             self,
             name: str,
-            default: Union[object, bytes]=MISSING,
-            allow_tokens: bool=True) -> bytes:
+            default: Union[object, bytes] = MISSING,
+            allow_tokens: bool = True) -> bytes:
         if name in self._files and self._files[name]:
             return self._files[name]
 
@@ -70,7 +70,7 @@ class Context:
     def get_param_as_list(
             self,
             name: str,
-            default: Union[object, List[Any]]=MISSING) -> List[Any]:
+            default: Union[object, List[Any]] = MISSING) -> List[Any]:
         if name not in self._params:
             if default is not MISSING:
                 return cast(List[Any], default)
@@ -89,7 +89,7 @@ class Context:
     def get_param_as_int_list(
             self,
             name: str,
-            default: Union[object, List[int]]=MISSING) -> List[int]:
+            default: Union[object, List[int]] = MISSING) -> List[int]:
         ret = self.get_param_as_list(name, default)
         for item in ret:
             if type(item) is not int:
@@ -100,7 +100,7 @@ class Context:
     def get_param_as_string_list(
             self,
             name: str,
-            default: Union[object, List[str]]=MISSING) -> List[str]:
+            default: Union[object, List[str]] = MISSING) -> List[str]:
         ret = self.get_param_as_list(name, default)
         for item in ret:
             if type(item) is not str:
@@ -111,7 +111,7 @@ class Context:
     def get_param_as_string(
             self,
             name: str,
-            default: Union[object, str]=MISSING) -> str:
+            default: Union[object, str] = MISSING) -> str:
         if name not in self._params:
             if default is not MISSING:
                 return cast(str, default)
@@ -135,9 +135,9 @@ class Context:
     def get_param_as_int(
             self,
             name: str,
-            default: Union[object, int]=MISSING,
-            min: Optional[int]=None,
-            max: Optional[int]=None) -> int:
+            default: Union[object, int] = MISSING,
+            min: Optional[int] = None,
+            max: Optional[int] = None) -> int:
         if name not in self._params:
             if default is not MISSING:
                 return cast(int, default)
@@ -161,7 +161,7 @@ class Context:
     def get_param_as_bool(
             self,
             name: str,
-            default: Union[object, bool]=MISSING) -> bool:
+            default: Union[object, bool] = MISSING) -> bool:
         if name not in self._params:
             if default is not MISSING:
                 return cast(bool, default)
diff --git a/server/szurubooru/rest/errors.py b/server/szurubooru/rest/errors.py
index 6854e7d..f90ac25 100644
--- a/server/szurubooru/rest/errors.py
+++ b/server/szurubooru/rest/errors.py
@@ -1,4 +1,4 @@
-from typing import Callable, Type, Dict
+from typing import Optional, Callable, Type, Dict
 
 
 error_handlers = {}  # pylint: disable=invalid-name
@@ -12,8 +12,8 @@ class BaseHttpError(RuntimeError):
             self,
             name: str,
             description: str,
-            title: str=None,
-            extra_fields: Dict[str, str]=None) -> None:
+            title: Optional[str] = None,
+            extra_fields: Optional[Dict[str, str]] = None) -> None:
         super().__init__()
         # error name for programmers
         self.name = name
diff --git a/server/szurubooru/rest/middleware.py b/server/szurubooru/rest/middleware.py
index 05d9495..ce457e0 100644
--- a/server/szurubooru/rest/middleware.py
+++ b/server/szurubooru/rest/middleware.py
@@ -1,4 +1,4 @@
-from typing import Callable
+from typing import List, Callable
 from szurubooru.rest.context import Context
 
 
diff --git a/server/szurubooru/rest/routes.py b/server/szurubooru/rest/routes.py
index c0b6bea..569cbe1 100644
--- a/server/szurubooru/rest/routes.py
+++ b/server/szurubooru/rest/routes.py
@@ -1,4 +1,4 @@
-from typing import Callable, Dict, Any
+from typing import Callable, Dict
 from collections import defaultdict
 from szurubooru.rest.context import Context, Response
 
diff --git a/server/szurubooru/search/configs/post_search_config.py b/server/szurubooru/search/configs/post_search_config.py
index 1dd8514..8baa0dd 100644
--- a/server/szurubooru/search/configs/post_search_config.py
+++ b/server/szurubooru/search/configs/post_search_config.py
@@ -52,10 +52,11 @@ def _create_score_filter(score: int) -> Filter:
             user_alias.name, criterion)
         if negated:
             expr = ~expr
-        ret = query \
-            .join(score_alias, score_alias.post_id == model.Post.post_id) \
-            .join(user_alias, user_alias.user_id == score_alias.user_id) \
-            .filter(expr)
+        ret = (
+            query
+            .join(score_alias, score_alias.post_id == model.Post.post_id)
+            .join(user_alias, user_alias.user_id == score_alias.user_id)
+            .filter(expr))
         return ret
     return wrapper
 
@@ -124,7 +125,8 @@ class PostSearchConfig(BaseSearchConfig):
             sa.orm.lazyload
             if disable_eager_loads
             else sa.orm.subqueryload)
-        return db.session.query(model.Post) \
+        return (
+            db.session.query(model.Post)
             .options(
                 sa.orm.lazyload('*'),
                 # use config optimized for official client
@@ -141,7 +143,7 @@ class PostSearchConfig(BaseSearchConfig):
                 strategy(model.Post.tags).subqueryload(model.Tag.names),
                 strategy(model.Post.tags).defer(model.Tag.post_count),
                 strategy(model.Post.tags).lazyload(model.Tag.implications),
-                strategy(model.Post.tags).lazyload(model.Tag.suggestions))
+                strategy(model.Post.tags).lazyload(model.Tag.suggestions)))
 
     def create_count_query(self, _disable_eager_loads: bool) -> SaQuery:
         return db.session.query(model.Post)
diff --git a/server/szurubooru/search/configs/tag_search_config.py b/server/szurubooru/search/configs/tag_search_config.py
index 6dba5b0..db3b4b2 100644
--- a/server/szurubooru/search/configs/tag_search_config.py
+++ b/server/szurubooru/search/configs/tag_search_config.py
@@ -14,8 +14,9 @@ class TagSearchConfig(BaseSearchConfig):
             sa.orm.lazyload
             if _disable_eager_loads
             else sa.orm.subqueryload)
-        return db.session.query(model.Tag) \
-            .join(model.TagCategory) \
+        return (
+            db.session.query(model.Tag)
+            .join(model.TagCategory)
             .options(
                 sa.orm.defer(model.Tag.first_name),
                 sa.orm.defer(model.Tag.suggestion_count),
@@ -23,7 +24,7 @@ class TagSearchConfig(BaseSearchConfig):
                 sa.orm.defer(model.Tag.post_count),
                 strategy(model.Tag.names),
                 strategy(model.Tag.suggestions).joinedload(model.Tag.names),
-                strategy(model.Tag.implications).joinedload(model.Tag.names))
+                strategy(model.Tag.implications).joinedload(model.Tag.names)))
 
     def create_count_query(self, _disable_eager_loads: bool) -> SaQuery:
         return db.session.query(model.Tag)
diff --git a/server/szurubooru/search/configs/util.py b/server/szurubooru/search/configs/util.py
index ac4bd8e..9c4d3ae 100644
--- a/server/szurubooru/search/configs/util.py
+++ b/server/szurubooru/search/configs/util.py
@@ -69,7 +69,7 @@ def float_transformer(value: str) -> float:
 def apply_num_criterion_to_column(
         column: Any,
         criterion: criteria.BaseCriterion,
-        transformer: Callable[[str], Number]=integer_transformer) -> SaQuery:
+        transformer: Callable[[str], Number] = integer_transformer) -> SaQuery:
     try:
         if isinstance(criterion, criteria.PlainCriterion):
             expr = column == transformer(criterion.value)
@@ -95,7 +95,7 @@ def apply_num_criterion_to_column(
 
 def create_num_filter(
         column: Any,
-        transformer: Callable[[str], Number]=integer_transformer) -> SaQuery:
+        transformer: Callable[[str], Number] = integer_transformer) -> SaQuery:
     def wrapper(
             query: SaQuery,
             criterion: Optional[criteria.BaseCriterion],
@@ -111,7 +111,7 @@ def create_num_filter(
 def apply_str_criterion_to_column(
         column: SaColumn,
         criterion: criteria.BaseCriterion,
-        transformer: Callable[[str], str]=wildcard_transformer) -> SaQuery:
+        transformer: Callable[[str], str] = wildcard_transformer) -> SaQuery:
     if isinstance(criterion, criteria.PlainCriterion):
         expr = column.ilike(transformer(criterion.value))
     elif isinstance(criterion, criteria.ArrayCriterion):
@@ -128,8 +128,8 @@ def apply_str_criterion_to_column(
 
 
 def create_str_filter(
-    column: SaColumn, transformer: Callable[[str], str]=wildcard_transformer
-) -> Filter:
+        column: SaColumn,
+        transformer: Callable[[str], str] = wildcard_transformer) -> Filter:
     def wrapper(
             query: SaQuery,
             criterion: Optional[criteria.BaseCriterion],
@@ -187,7 +187,7 @@ def create_subquery_filter(
         right_id_column: SaColumn,
         filter_column: SaColumn,
         filter_factory: SaColumn,
-        subquery_decorator: Callable[[SaQuery], None]=None) -> Filter:
+        subquery_decorator: Callable[[SaQuery], None] = None) -> Filter:
     filter_func = filter_factory(filter_column)
 
     def wrapper(
diff --git a/server/szurubooru/search/criteria.py b/server/szurubooru/search/criteria.py
index 7b1fee3..4512b0f 100644
--- a/server/szurubooru/search/criteria.py
+++ b/server/szurubooru/search/criteria.py
@@ -1,4 +1,4 @@
-from typing import Optional, List, Callable
+from typing import Optional, List
 from szurubooru.search.typing import SaQuery
 
 
diff --git a/server/szurubooru/search/executor.py b/server/szurubooru/search/executor.py
index ee1cedf..0a8202c 100644
--- a/server/szurubooru/search/executor.py
+++ b/server/szurubooru/search/executor.py
@@ -100,18 +100,20 @@ class Executor:
         filter_query = self.config.create_filter_query(disable_eager_loads)
         filter_query = filter_query.options(sa.orm.lazyload('*'))
         filter_query = self._prepare_db_query(filter_query, search_query, True)
-        entities = filter_query \
-            .offset(offset) \
-            .limit(limit) \
-            .all()
+        entities = (
+            filter_query
+            .offset(offset)
+            .limit(limit)
+            .all())
 
         count_query = self.config.create_count_query(disable_eager_loads)
         count_query = count_query.options(sa.orm.lazyload('*'))
         count_query = self._prepare_db_query(count_query, search_query, False)
-        count_statement = count_query \
-            .statement \
-            .with_only_columns([sa.func.count()]) \
-            .order_by(None)
+        count_statement = (
+            count_query
+            .statement
+            .with_only_columns([sa.func.count()])
+            .order_by(None))
         count = db.session.execute(count_statement).scalar()
 
         ret = (count, entities)
diff --git a/server/szurubooru/search/parser.py b/server/szurubooru/search/parser.py
index 50d8fb0..79cf968 100644
--- a/server/szurubooru/search/parser.py
+++ b/server/szurubooru/search/parser.py
@@ -1,5 +1,4 @@
 import re
-from typing import Match, List
 from szurubooru import errors
 from szurubooru.search import criteria, tokens
 from szurubooru.search.query import SearchQuery
diff --git a/server/szurubooru/search/query.py b/server/szurubooru/search/query.py
index 7d29dbd..3d304f8 100644
--- a/server/szurubooru/search/query.py
+++ b/server/szurubooru/search/query.py
@@ -1,4 +1,5 @@
 from szurubooru.search import tokens
+from typing import List
 
 
 class SearchQuery:
diff --git a/server/szurubooru/tests/api/test_tag_creating.py b/server/szurubooru/tests/api/test_tag_creating.py
index 771b9f6..0c8d582 100644
--- a/server/szurubooru/tests/api/test_tag_creating.py
+++ b/server/szurubooru/tests/api/test_tag_creating.py
@@ -1,6 +1,6 @@
 from unittest.mock import patch
 import pytest
-from szurubooru import api, db, model, errors
+from szurubooru import api, model, errors
 from szurubooru.func import tags, snapshots
 
 
diff --git a/server/szurubooru/tests/api/test_user_creating.py b/server/szurubooru/tests/api/test_user_creating.py
index df2e80b..b5f36e3 100644
--- a/server/szurubooru/tests/api/test_user_creating.py
+++ b/server/szurubooru/tests/api/test_user_creating.py
@@ -1,6 +1,6 @@
 from unittest.mock import patch
 import pytest
-from szurubooru import api, db, model, errors
+from szurubooru import api, model, errors
 from szurubooru.func import users
 
 
diff --git a/server/szurubooru/tests/func/test_users.py b/server/szurubooru/tests/func/test_users.py
index 53d47de..76c52c8 100644
--- a/server/szurubooru/tests/func/test_users.py
+++ b/server/szurubooru/tests/func/test_users.py
@@ -5,10 +5,10 @@ from szurubooru import db, model, errors
 from szurubooru.func import auth, users, files, util
 
 
-EMPTY_PIXEL = \
-    b'\x47\x49\x46\x38\x39\x61\x01\x00\x01\x00\x80\x01\x00\x00\x00\x00' \
-    b'\xff\xff\xff\x21\xf9\x04\x01\x00\x00\x01\x00\x2c\x00\x00\x00\x00' \
-    b'\x01\x00\x01\x00\x00\x02\x02\x4c\x01\x00\x3b'
+EMPTY_PIXEL = (
+    b'\x47\x49\x46\x38\x39\x61\x01\x00\x01\x00\x80\x01\x00\x00\x00\x00'
+    b'\xff\xff\xff\x21\xf9\x04\x01\x00\x00\x01\x00\x2c\x00\x00\x00\x00'
+    b'\x01\x00\x01\x00\x00\x02\x02\x4c\x01\x00\x3b')
 
 
 @pytest.mark.parametrize('user_name', ['test', 'TEST'])
diff --git a/server/szurubooru/tests/model/test_tag.py b/server/szurubooru/tests/model/test_tag.py
index 7d3d8d2..07bbc0e 100644
--- a/server/szurubooru/tests/model/test_tag.py
+++ b/server/szurubooru/tests/model/test_tag.py
@@ -28,11 +28,12 @@ def test_saving_tag(tag_factory):
     tag.implications.append(imp2)
     db.session.commit()
 
-    tag = db.session \
-        .query(model.Tag) \
-        .join(model.TagName) \
-        .filter(model.TagName.name == 'alias1') \
-        .one()
+    tag = (
+        db.session
+        .query(model.Tag)
+        .join(model.TagName)
+        .filter(model.TagName.name == 'alias1')
+        .one())
     assert [tag_name.name for tag_name in tag.names] == ['alias1', 'alias2']
     assert tag.category.name == 'category'
     assert tag.creation_time == datetime(1997, 1, 1)
diff --git a/server/szurubooru/tests/search/configs/test_post_search_config.py b/server/szurubooru/tests/search/configs/test_post_search_config.py
index b42b3f5..4d541d1 100644
--- a/server/szurubooru/tests/search/configs/test_post_search_config.py
+++ b/server/szurubooru/tests/search/configs/test_post_search_config.py
@@ -300,7 +300,7 @@ def test_filter_by_note_count(
     ('note-text:text3*', [3]),
     ('note-text:text3a,text2', [2, 3]),
 ])
-def test_filter_by_note_count(
+def test_filter_by_note_text(
         verify_unpaged, post_factory, note_factory, input, expected_post_ids):
     post1 = post_factory(id=1)
     post2 = post_factory(id=2)