balsn-2021-writeup 戰績 Metaeasy 題目 server code class MasterMetaClass(type): def __new__(cls, class_name, class_parents, class_attr): def getFlag(self): print('Here you go, my master') with open('flag') as f: print(f.read()) class_attr[getFlag.__name__] = getFlag attrs = ((name, value) …