python实现获取文件中的类方式

for importer, package_name, is_pkg in pkgutil.walk_packages('.'):
	importlib.import_module(package_name)
	module = sys.modules[package_name]

	for cls_name, cls in inspect.getmembers(module, inspect.isclass):
		if is_want_class(cls):  
			do_something()

Parse source code into a parse tree (Parser/pgen.c)
Transform parse tree into an Abstract Syntax Tree (Python/ast.c)
Transform AST into a Control Flow Graph (Python/compile.c)
Emit bytecode based on the Control Flow Graph (Python/compile.c)

for root, dirs, files in os.walk("."):
	for file in files:
	    file_name = os.path.join(root, file)

	    with open(file_name, "r") as source:
                    # 将文件转化为ast树
                tree = ast.parse(source.read())
                # 获取树中的类
                class_name_list = [node.name for node in ast.walk(tree) if isinstance(node, ast.ClassDef)]
                # 这里通过正则want_pattern去匹配类，从而过滤出想要的类
                want_class_name_list = [name for name in class_name_list if re.search(want_pattern, name) is not None]