from contextlib import contextmanager
@contextmanager
def tag(name):
print("<%s>" % name)
yield
print("</%s>" % name)
with tag('h1') :
print('Hello')
ZnJvbSBjb250ZXh0bGliIGltcG9ydCBjb250ZXh0bWFuYWdlcgoKQGNvbnRleHRtYW5hZ2VyCmRlZiB0YWcobmFtZSk6CiAgICBwcmludCgiPCVzPiIgJSBuYW1lKQogICAgeWllbGQKICAgIHByaW50KCI8LyVzPiIgJSBuYW1lKQoKd2l0aCB0YWcoJ2gxJykgOgogICAgcHJpbnQoJ0hlbGxvJyk=