Remove dependency on typing_extensions

Protocol is part of the standard lib since Python 3.8.

gaphas/aspect/connector.py

@@ -1,7 +1,5 @@
 from functools import singledispatch
-from typing import Callable, Optional
-
-from typing_extensions import Protocol
+from typing import Callable, Optional, Protocol
 
 from gaphas.connections import Connections
 from gaphas.connector import Handle, LinePort, Port

gaphas/canvas.py

@@ -28,10 +28,9 @@
 from __future__ import annotations
 
 import logging
-from typing import TYPE_CHECKING, Iterable
+from typing import TYPE_CHECKING, Iterable, Protocol
 
 import cairo
-from typing_extensions import Protocol
 
 from gaphas import matrix, tree
 from gaphas.connections import Connection, Connections

gaphas/item.py

@@ -3,9 +3,7 @@
 
 from dataclasses import dataclass
 from math import atan2
-from typing import TYPE_CHECKING, Iterable, Sequence
-
-from typing_extensions import Protocol, runtime_checkable
+from typing import TYPE_CHECKING, Iterable, Protocol, Sequence, runtime_checkable
 
 from gaphas.connector import Handle, LinePort, Port
 from gaphas.constraint import Constraint, EqualsConstraint, constraint

gaphas/painter/painter.py

@@ -6,9 +6,7 @@
 and handles).
 """
 
-from typing import Collection
-
-from typing_extensions import Protocol
+from typing import Collection, Protocol
 
 from gaphas.item import Item
 from gaphas.types import CairoContext

gaphas/solver/constraint.py

@@ -1,8 +1,6 @@
 from __future__ import annotations
 
-from typing import Callable, Collection, Hashable
-
-from typing_extensions import Protocol, runtime_checkable
+from typing import Callable, Collection, Hashable, Protocol, runtime_checkable
 
 from gaphas.solver.variable import Variable
 

gaphas/table.py

@@ -2,9 +2,18 @@
 would in a database table, with indexes on the desired "columns."."""
 
 from functools import reduce
-from typing import Dict, Generic, Iterator, Sequence, Set, Tuple, Type, TypeVar
-
-from typing_extensions import Protocol, runtime_checkable
+from typing import (
+    Dict,
+    Generic,
+    Iterator,
+    Protocol,
+    Sequence,
+    Set,
+    Tuple,
+    Type,
+    TypeVar,
+    runtime_checkable,
+)
 
 T = TypeVar("T", bound=Tuple, covariant=True)
 

gaphas/types.py

@@ -1,7 +1,6 @@
-from typing import List, Optional, Sequence, SupportsFloat, Tuple, TypeVar
+from typing import List, Optional, Protocol, Sequence, SupportsFloat, Tuple, TypeVar
 
 import cairo
-from typing_extensions import Protocol
 
 # A primitive position, tuple ``(x, y)``
 # Pos = Tuple[Union[float, SupportsFloat], Union[float, SupportsFloat]]

gaphas/view/model.py

@@ -1,8 +1,6 @@
 from __future__ import annotations
 
-from typing import Collection, Iterable
-
-from typing_extensions import Protocol, runtime_checkable
+from typing import Collection, Iterable, Protocol, runtime_checkable
 
 from gaphas.connections import Connections
 from gaphas.item import Item

pyproject.toml

@@ -33,7 +33,6 @@ classifiers = [
 python = "^3.8"
 PyGObject = "^3.38.0"
 pycairo = "^1.20.0"
-typing-extensions = "^3.7.4"
 
 [tool.poetry.dev-dependencies]
 pytest = "^6.2"