matplotlib · deep-jkl · Aug 27, 2021 · Aug 28, 2021 · Aug 29, 2021 · Aug 29, 2021
diff --git a/lib/matplotlib/tests/test_textpath.py b/lib/matplotlib/tests/test_textpath.py
@@ -0,0 +1,43 @@
+from copy import copy, deepcopy
+
+from numpy.testing import assert_array_equal
+from matplotlib.textpath import TextPath
+
+
+def test_set_size():
+    """Set size with zero offset should scale vertices and retain codes."""
+    path = TextPath((0, 0), ".")
+    _size = path.get_size()
+    verts = path.vertices.copy()
+    codes = path.codes.copy()
+    path.set_size(20)
+    assert_array_equal(verts/_size*path.get_size(), path.vertices)
+    assert_array_equal(codes, path.codes)
+
+
+def test_deepcopy():
+    path = TextPath((0, 0), ".")
+    path_copy = deepcopy(path)
+    assert isinstance(path_copy, TextPath)
+    assert path is not path_copy
+    assert path.vertices is not path_copy.vertices
+    assert path.codes is not path_copy.codes
+    path = TextPath((0, 0), ".")
+    path_copy = path.deepcopy({})
+    assert isinstance(path_copy, TextPath)
+    assert path is not path_copy
+    assert path.vertices is not path_copy.vertices
+    assert path.codes is not path_copy.codes
+
+
+def test_copy():
+    path = TextPath((0, 0), ".")
+    path_copy = copy(path)
+    assert path is not path_copy
+    assert path.vertices is path_copy.vertices
+    assert path.codes is path_copy.codes
+    path = TextPath((0, 0), ".")
+    path_copy = path.copy()
+    assert path is not path_copy
+    assert path.vertices is path_copy.vertices
+    assert path.codes is path_copy.codes
diff --git a/lib/matplotlib/textpath.py b/lib/matplotlib/textpath.py
@@ -1,3 +1,4 @@
+from copy import deepcopy
 from collections import OrderedDict
 import functools
 import logging
@@ -429,3 +430,23 @@ def _revalidate_path(self):
             self._cached_vertices = tr.transform(self._vertices)
             self._cached_vertices.flags.writeable = False
             self._invalid = False
+
+    def __deepcopy__(self, memo):
+        """Update path and create deep copy."""
+        self._revalidate_path()
+        cls = self.__class__
+        new_instance = cls.__new__(cls)
+        memo[id(self)] = new_instance
+        for k, v in self.__dict__.items():
+            setattr(new_instance, k, deepcopy(v, memo))
+        return new_instance
+
+    deepcopy = __deepcopy__
+
+    def __copy__(self):
+        """Update path and create shallow copy."""
+        self._revalidate_path()
+        cls = self.__class__
+        new_instance = cls.__new__(cls)
+        new_instance.__dict__.update(self.__dict__)
+        return new_instance