pyupgrade to 3.9

.pre-commit-config.yaml

@@ -2,6 +2,12 @@
 # Please run `pre-commit run --all-files` when adding or changing entries.
 
 repos:
+  - repo: https://github.com/asottile/pyupgrade
+    rev: v3.15.0
+    hooks:
+      - id: pyupgrade
+        language_version: "3.9"
+
   - repo: local
     hooks:
       - id: ruff

docs/conf.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 #
 # Configuration file for the Sphinx documentation builder.
 #

pystac/asset.py

@@ -4,7 +4,7 @@
 import shutil
 from copy import copy, deepcopy
 from html import escape
-from typing import TYPE_CHECKING, Any, Dict, List, Optional, Type, TypeVar, Union
+from typing import TYPE_CHECKING, Any, TypeVar
 
 from pystac import common_metadata, utils
 from pystac.html.jinja_env import get_jinja_env
@@ -41,38 +41,38 @@ class Asset:
     href: str
     """Link to the asset object. Relative and absolute links are both allowed."""
 
-    title: Optional[str]
+    title: str | None
     """Optional displayed title for clients and users."""
 
-    description: Optional[str]
+    description: str | None
     """A description of the Asset providing additional details, such as how it was
     processed or created. CommonMark 0.29 syntax MAY be used for rich text
     representation."""
 
-    media_type: Optional[str]
+    media_type: str | None
     """Optional description of the media type. Registered Media Types are preferred.
     See :class:`~pystac.MediaType` for common media types."""
 
-    roles: Optional[List[str]]
+    roles: list[str] | None
     """Optional, Semantic roles (i.e. thumbnail, overview, data, metadata) of the
     asset."""
 
-    owner: Optional[Union[Item, Collection]]
+    owner: Item | Collection | None
     """The :class:`~pystac.Item` or :class:`~pystac.Collection` that this asset belongs
     to, or ``None`` if it has no owner."""
 
-    extra_fields: Dict[str, Any]
+    extra_fields: dict[str, Any]
     """Optional, additional fields for this asset. This is used by extensions as a
     way to serialize and deserialize properties on asset object JSON."""
 
     def __init__(
         self,
         href: str,
-        title: Optional[str] = None,
-        description: Optional[str] = None,
-        media_type: Optional[str] = None,
-        roles: Optional[List[str]] = None,
-        extra_fields: Optional[Dict[str, Any]] = None,
+        title: str | None = None,
+        description: str | None = None,
+        media_type: str | None = None,
+        roles: list[str] | None = None,
+        extra_fields: dict[str, Any] | None = None,
     ) -> None:
         self.href = utils.make_posix_style(href)
         self.title = title
@@ -84,7 +84,7 @@ def __init__(
         # The Item which owns this Asset.
         self.owner = None
 
-    def set_owner(self, obj: Union[Collection, Item]) -> None:
+    def set_owner(self, obj: Collection | Item) -> None:
         """Sets the owning item of this Asset.
 
         The owning item will be used to resolve relative HREFs of this asset.
@@ -94,7 +94,7 @@ def set_owner(self, obj: Union[Collection, Item]) -> None:
         """
         self.owner = obj
 
-    def get_absolute_href(self) -> Optional[str]:
+    def get_absolute_href(self) -> str | None:
         """Gets the absolute href for this asset, if possible.
 
         If this Asset has no associated Item, and the asset HREF is a relative path,
@@ -114,14 +114,14 @@ def get_absolute_href(self) -> Optional[str]:
                     return utils.make_absolute_href(self.href, item_self)
             return None
 
-    def to_dict(self) -> Dict[str, Any]:
+    def to_dict(self) -> dict[str, Any]:
         """Returns this Asset as a dictionary.
 
         Returns:
             dict: A serialization of the Asset.
         """
 
-        d: Dict[str, Any] = {"href": self.href}
+        d: dict[str, Any] = {"href": self.href}
 
         if self.media_type is not None:
             d["type"] = self.media_type
@@ -190,7 +190,7 @@ def _repr_html_(self) -> str:
             return escape(repr(self))
 
     @classmethod
-    def from_dict(cls: Type[A], d: Dict[str, Any]) -> A:
+    def from_dict(cls: type[A], d: dict[str, Any]) -> A:
         """Constructs an Asset from a dict.
 
         Returns:
@@ -276,7 +276,7 @@ def ext(self) -> AssetExt:
 
 
 def _absolute_href(
-    href: str, owner: Optional[Union[Item, Collection]], action: str = "access"
+    href: str, owner: Item | Collection | None, action: str = "access"
 ) -> str:
     if utils.is_absolute_href(href):
         return href

pystac/cache.py

@@ -2,7 +2,7 @@
 
 from collections import ChainMap
 from copy import copy
-from typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple, Union, cast
+from typing import TYPE_CHECKING, Any, cast
 
 import pystac
 
@@ -11,7 +11,7 @@
     from pystac.stac_object import STACObject
 
 
-def get_cache_key(stac_object: STACObject) -> Tuple[str, bool]:
+def get_cache_key(stac_object: STACObject) -> tuple[str, bool]:
     """Produce a cache key for the given STAC object.
 
     If a self href is set, use that as the cache key.
@@ -27,8 +27,8 @@ def get_cache_key(stac_object: STACObject) -> Tuple[str, bool]:
     if href is not None:
         return href, True
     else:
-        ids: List[str] = []
-        obj: Optional[pystac.STACObject] = stac_object
+        ids: list[str] = []
+        obj: pystac.STACObject | None = stac_object
         while obj is not None:
             ids.append(obj.id)
             obj = obj.get_parent()
@@ -61,23 +61,23 @@ class ResolvedObjectCache:
             to collections.
     """
 
-    id_keys_to_objects: Dict[str, STACObject]
+    id_keys_to_objects: dict[str, STACObject]
     """Existing cache of a key made up of the STACObject and it's parents IDs mapped
     to the cached STACObject."""
 
-    hrefs_to_objects: Dict[str, STACObject]
+    hrefs_to_objects: dict[str, STACObject]
     """STAC Object HREFs matched to their cached object."""
 
-    ids_to_collections: Dict[str, Collection]
+    ids_to_collections: dict[str, Collection]
     """Map of collection IDs to collections."""
 
-    _collection_cache: Optional["ResolvedObjectCollectionCache"]
+    _collection_cache: ResolvedObjectCollectionCache | None
 
     def __init__(
         self,
-        id_keys_to_objects: Optional[Dict[str, STACObject]] = None,
-        hrefs_to_objects: Optional[Dict[str, STACObject]] = None,
-        ids_to_collections: Optional[Dict[str, Collection]] = None,
+        id_keys_to_objects: dict[str, STACObject] | None = None,
+        hrefs_to_objects: dict[str, STACObject] | None = None,
+        ids_to_collections: dict[str, Collection] | None = None,
     ):
         self.id_keys_to_objects = id_keys_to_objects or {}
         self.hrefs_to_objects = hrefs_to_objects or {}
@@ -111,7 +111,7 @@ def get_or_cache(self, obj: STACObject) -> STACObject:
                 self.cache(obj)
                 return obj
 
-    def get(self, obj: STACObject) -> Optional[STACObject]:
+    def get(self, obj: STACObject) -> STACObject | None:
         """Get the cached object that has the same cache key as the given object.
 
         Args:
@@ -128,7 +128,7 @@ def get(self, obj: STACObject) -> Optional[STACObject]:
         else:
             return self.id_keys_to_objects.get(key)
 
-    def get_by_href(self, href: str) -> Optional[STACObject]:
+    def get_by_href(self, href: str) -> STACObject | None:
         """Gets the cached object at href.
 
         Args:
@@ -139,7 +139,7 @@ def get_by_href(self, href: str) -> Optional[STACObject]:
         """
         return self.hrefs_to_objects.get(href)
 
-    def get_collection_by_id(self, id: str) -> Optional[Collection]:
+    def get_collection_by_id(self, id: str) -> Collection | None:
         """Retrieved a cached Collection by its ID.
 
         Args:
@@ -199,7 +199,7 @@ def as_collection_cache(self) -> CollectionCache:
 
     @staticmethod
     def merge(
-        first: "ResolvedObjectCache", second: "ResolvedObjectCache"
+        first: ResolvedObjectCache, second: ResolvedObjectCache
     ) -> ResolvedObjectCache:
         """Merges two ResolvedObjectCache.
 
@@ -247,32 +247,30 @@ class CollectionCache:
     in common properties.
     """
 
-    cached_ids: Dict[str, Union[Collection, Dict[str, Any]]]
-    cached_hrefs: Dict[str, Union[Collection, Dict[str, Any]]]
+    cached_ids: dict[str, Collection | dict[str, Any]]
+    cached_hrefs: dict[str, Collection | dict[str, Any]]
 
     def __init__(
         self,
-        cached_ids: Optional[Dict[str, Union[Collection, Dict[str, Any]]]] = None,
-        cached_hrefs: Optional[Dict[str, Union[Collection, Dict[str, Any]]]] = None,
+        cached_ids: dict[str, Collection | dict[str, Any]] | None = None,
+        cached_hrefs: dict[str, Collection | dict[str, Any]] | None = None,
     ):
         self.cached_ids = cached_ids or {}
         self.cached_hrefs = cached_hrefs or {}
 
-    def get_by_id(
-        self, collection_id: str
-    ) -> Optional[Union[Collection, Dict[str, Any]]]:
+    def get_by_id(self, collection_id: str) -> Collection | dict[str, Any] | None:
         return self.cached_ids.get(collection_id)
 
-    def get_by_href(self, href: str) -> Optional[Union[Collection, Dict[str, Any]]]:
+    def get_by_href(self, href: str) -> Collection | dict[str, Any] | None:
         return self.cached_hrefs.get(href)
 
     def contains_id(self, collection_id: str) -> bool:
         return collection_id in self.cached_ids
 
     def cache(
         self,
-        collection: Union[Collection, Dict[str, Any]],
-        href: Optional[str] = None,
+        collection: Collection | dict[str, Any],
+        href: str | None = None,
     ) -> None:
         """Caches a collection JSON."""
         if isinstance(collection, pystac.Collection):
@@ -290,22 +288,20 @@ class ResolvedObjectCollectionCache(CollectionCache):
     def __init__(
         self,
         resolved_object_cache: ResolvedObjectCache,
-        cached_ids: Optional[Dict[str, Union[Collection, Dict[str, Any]]]] = None,
-        cached_hrefs: Optional[Dict[str, Union[Collection, Dict[str, Any]]]] = None,
+        cached_ids: dict[str, Collection | dict[str, Any]] | None = None,
+        cached_hrefs: dict[str, Collection | dict[str, Any]] | None = None,
     ):
         super().__init__(cached_ids, cached_hrefs)
         self.resolved_object_cache = resolved_object_cache
 
-    def get_by_id(
-        self, collection_id: str
-    ) -> Optional[Union[Collection, Dict[str, Any]]]:
+    def get_by_id(self, collection_id: str) -> Collection | dict[str, Any] | None:
         result = self.resolved_object_cache.get_collection_by_id(collection_id)
         if result is None:
             return super().get_by_id(collection_id)
         else:
             return result
 
-    def get_by_href(self, href: str) -> Optional[Union[Collection, Dict[str, Any]]]:
+    def get_by_href(self, href: str) -> Collection | dict[str, Any] | None:
         result = self.resolved_object_cache.get_by_href(href)
         if result is None:
             return super().get_by_href(href)
@@ -319,16 +315,16 @@ def contains_id(self, collection_id: str) -> bool:
 
     def cache(
         self,
-        collection: Union[Collection, Dict[str, Any]],
-        href: Optional[str] = None,
+        collection: Collection | dict[str, Any],
+        href: str | None = None,
     ) -> None:
         super().cache(collection, href)
 
     @staticmethod
     def merge(
         resolved_object_cache: ResolvedObjectCache,
-        first: Optional["ResolvedObjectCollectionCache"],
-        second: Optional["ResolvedObjectCollectionCache"],
+        first: ResolvedObjectCollectionCache | None,
+        second: ResolvedObjectCollectionCache | None,
     ) -> ResolvedObjectCollectionCache:
         first_cached_ids = {}
         if first is not None: