Fix compatibility with pygfx (#130)

* Fix compatibility with pygfx

This change prevents reactivity on custom dict subclasses and
instead will check that only real dicts are converted into
reactive proxies.
The problem is that pygfx's geometry is a dict subclass and
turning it into a reactive proxy will stop it from being recognized
as a Geometry type, so pygfx will not accept it when you try to
set the geometry attribute on a Mesh.
I could check for pygfx specifically, but it seems to me that
more problems are to be expected in the future if observ tries
to proxy custom dict subclasses.
I'm thinking to update list and set proxy as well.

* Fix linting by formatting

* Remove uv.lock

Author: berendkleinhaneveld

.gitignore

@@ -6,3 +6,4 @@ dist
 .benchmarks
 .venv
 .pytest_cache
+uv.lock

observ/dict_proxy.py

@@ -77,7 +77,7 @@ def readonly_dict_proxy_init(self, target, shallow=False, **kwargs):
 
 
 def type_test(target):
-    return isinstance(target, dict)
+    return type(target) is dict
 
 
 TYPE_LOOKUP[type_test] = (DictProxy, ReadonlyDictProxy)

pyproject.toml

@@ -31,6 +31,7 @@ qt = [
     "pytest-qt",
     "pytest-xvfb",
 ]
+pygfx = ["pygfx"]
 numpy = ["numpy"]
 
 [tool.uv]

tests/test_proxy.py

@@ -256,3 +256,14 @@ def test_tuple_equality():
     assert isinstance(raw, tuple)
     assert p is not raw
     assert p == raw
+
+
+def test_dict_subclass_not_wrapped():
+    class Custom(dict):
+        pass
+
+    raw = Custom(foo="bar")
+    p = proxy(raw)
+    assert not isinstance(p, Proxy)
+    assert isinstance(raw, dict)
+    assert p is raw

tests/test_pygfx.py

@@ -0,0 +1,20 @@
+import pytest
+
+from observ import reactive
+
+try:
+    import pygfx as gfx
+
+    has_pygfx = True
+except ImportError:
+    has_pygfx = False
+pygfx_missing_reason = "Pygfx is not installed"
+
+
+@pytest.mark.skipif(not has_pygfx, reason=pygfx_missing_reason)
+def test_pygfx_geometry_not_wrapped():
+    geometry = gfx.sphere_geometry()
+
+    wrapped = reactive(geometry)
+    # Assert strict equality to test that it is not wrapped
+    assert wrapped is geometry