checker.py 文件源码

def handleNodeStore(self, node):
        name = getNodeName(node)
        if not name:
            return
        # if the name hasn't already been defined in the current scope
        if isinstance(self.scope, FunctionScope) and name not in self.scope:
            # for each function or module scope above us
            for scope in self.scopeStack[:-1]:
                if not isinstance(scope, (FunctionScope, ModuleScope)):
                    continue
                # if the name was defined in that scope, and the name has
                # been accessed already in the current scope, and hasn't
                # been declared global
                used = name in scope and scope[name].used
                if used and used[0] is self.scope and name not in self.scope.globals:
                    # then it's probably a mistake
                    self.report(messages.UndefinedLocal,
                                scope[name].used[1], name, scope[name].source)
                    break

        parent_stmt = self.getParent(node)
        if isinstance(parent_stmt, (ast.For, ast.comprehension)) or (
                parent_stmt != node.parent and
                not self.isLiteralTupleUnpacking(parent_stmt)):
            binding = Binding(name, node)
        elif name == '__all__' and isinstance(self.scope, ModuleScope):
            binding = ExportBinding(name, node.parent, self.scope)
        else:
            binding = Assignment(name, node)
        self.addBinding(node, binding)