[Port] add custom __deepcopy__

masque/ports.py

@@ -2,6 +2,7 @@ from typing import overload, Self, NoReturn, Any
 from collections.abc import Iterable, KeysView, ValuesView, Mapping
 import logging
 import functools
+import copy
 from collections import Counter
 from abc import ABCMeta, abstractmethod
 from itertools import chain
@@ -91,6 +92,12 @@ class Port(PositionableImpl, Rotatable, PivotableImpl, Copyable, Flippable):
     def copy(self) -> Self:
         return self.deepcopy()
 
+    def __deepcopy__(self, memo: dict | None = None) -> Self:
+        memo = {} if memo is None else memo
+        new = copy.copy(self)
+        new._offset = self._offset.copy()
+        return new
+
     def get_bounds(self) -> NDArray[numpy.float64]:
         return numpy.vstack((self.offset, self.offset))