fix: Ignore exceptions when trying to unwrap

Issue #45

Author: pawamoy

src/pytkdocs/loader.py

@@ -40,7 +40,16 @@ def __init__(self, obj: Any, name: str, parent: Optional["ObjectNode"] = None) -
             name: The object's name.
             parent: The object's parent node.
         """
-        self.obj: Any = inspect.unwrap(obj)
+        try:
+            obj = inspect.unwrap(obj)
+        except Exception:  # noqa: S110 (we purposely catch every possible exception)
+            # inspect.unwrap at some point runs hasattr(obj, "__wrapped__"),
+            # which triggers the __getattr__ method of the object, which in
+            # turn can raise various exceptions. Probably not just __getattr__.
+            # See https://github.com/pawamoy/pytkdocs/issues/45
+            pass
+
+        self.obj: Any = obj
         """The actual Python object."""
 
         self.name: str = name

tests/fixtures/unwrap_getattr_raises.py

@@ -0,0 +1,6 @@
+class TryMe:
+    def __getattr__(self, item):
+        raise ValueError
+
+
+TRY_ME = TryMe()

tests/test_loader.py

@@ -368,3 +368,9 @@ def test_loading_module_wrapped_members():
     obj = loader.get_object_documentation("tests.fixtures.wrapped_objects")
     assert obj.functions and obj.functions[0].docstring == "My docstring."
     assert obj.classes and obj.classes[0].methods and obj.classes[0].methods[0].docstring == "Hello!"
+
+
+def test_unwrap_object_with_getattr_method_raising_exception():
+    """Try loading an object that defines a `__getattr__` method which raises an exception."""
+    loader = Loader()
+    loader.get_object_documentation("tests.fixtures.unwrap_getattr_raises")