If a class attribute is used, do not report any global by the same na…

…me being used as well.

vulture/core.py

@@ -250,6 +250,7 @@ def handle_syntax_error(e):
             )
             self.exit_code = ExitCode.InvalidInput
         else:
+            utils.set_parent_info(node)
             # When parsing type comments, visiting can throw SyntaxError.
             try:
                 self.visit(node)
@@ -473,6 +474,10 @@ def ignored(lineno):
         last_node = last_node or first_node
         typ = collection.typ
         first_lineno = lines.get_first_line_number(first_node)
+        if isinstance(
+            first_node, (ast.FunctionDef, ast.AsyncFunctionDef, ast.Name)
+        ) and (class_part_of := utils.get_class(first_node)):
+            name = f"{class_part_of.name}.{name}"
 
         if ignored(first_lineno):
             self._log(f'Ignoring {typ} "{name}"')
@@ -509,7 +514,7 @@ def visit_Attribute(self, node):
         if isinstance(node.ctx, ast.Store):
             self._define(self.defined_attrs, node.attr, node)
         elif isinstance(node.ctx, ast.Load):
-            self.used_names.add(node.attr)
+            self.used_names.add(f"{node.value.id}.{node.attr}")
 
     def visit_BinOp(self, node):
         """

vulture/utils.py

@@ -111,6 +111,21 @@ def read_file(filename):
         raise VultureInputException from err
 
 
+def set_parent_info(tree: ast.AST):
+    tree.parent = None
+    for node in ast.walk(tree):
+        for child in ast.iter_child_nodes(node):
+            child.parent = node
+
+
+def get_class(node: ast.AST) -> ast.ClassDef | None:
+    while node is not None:
+        if isinstance(node, ast.ClassDef):
+            break
+        node = node.parent
+    return node
+
+
 class LoggingList(list):
     def __init__(self, typ, verbose):
         self.typ = typ