definition_chains.py 文件源码

def varse(node):
    vv = VarsVisitor()
    if isinstance(node.ast_node, ast.FunctionDef) or\
       isinstance(node.ast_node, ast.ClassDef):
        return list()
    elif isinstance(node.ast_node, ast.While)\
            or isinstance(node.ast_node, ast.If):
        vv.visit(node.ast_node.test)
    else:
        try:
            vv.visit(node.ast_node)
        except AttributeError:
            return list()

    if isinstance(node, AssignmentNode):
        result = list()
        for var in vv.result:
            if var not in node.left_hand_side:
                result.append(var)
        return result
    else:
        return vv.result