contextlib.ContextDecorator - Qiita

import contextlib # @contextlib.contextmanager # def tag(name): # print('<{}>'.format(name)) # yield # print('</{}>'.format(name)) class tag(contextlib.ContextDecorator): def __init__(self, name): self.name = name self.start_tag = '<{}>'.format(name) self.end_tag = '</{}>'.format(name) def __enter__(self): print(self.start_tag) def __exit__(self, exc_type, exc_val, exc_tb): print(exc_type) print(e