import Sequence et al from collections.abc not typing

examples/tutorial/basic_shapes.py

@@ -1,4 +1,4 @@
-from typing import Sequence
+from collections.abc import Sequence
 
 import numpy
 from numpy import pi

examples/tutorial/devices.py

@@ -1,4 +1,4 @@
-from typing import Sequence, Mapping
+from collections.abc import Sequence, Mapping
 
 import numpy
 from numpy import pi

examples/tutorial/library.py

@@ -1,4 +1,5 @@
-from typing import Sequence, Callable, Any
+from typing import Any
+from collections.abc import Sequence, Callable
 from pprint import pformat
 
 import numpy

examples/tutorial/pather.py

@@ -1,7 +1,7 @@
 """
 Manual wire routing tutorial: Pather and BasicTool
 """
-from typing import Callable
+from collections.abc import Callable
 from numpy import pi
 from masque import Pather, RenderPather, Library, Pattern, Port, layer_t, map_layers
 from masque.builder.tools import BasicTool, PathTool

examples/tutorial/pcgen.py

@@ -2,7 +2,7 @@
 Routines for creating normalized 2D lattices and common photonic crystal
  cavity designs.
 """
-from typing import Sequence
+from collection.abc import Sequence
 
 import numpy
 from numpy.typing import ArrayLike, NDArray

examples/tutorial/renderpather.py

@@ -1,7 +1,7 @@
 """
 Manual wire routing tutorial: RenderPather an PathTool
 """
-from typing import Callable
+from collections.abc import Callable
 from masque import RenderPather, Library, Pattern, Port, layer_t, map_layers
 from masque.builder.tools import PathTool
 from masque.file.gdsii import writefile