def show_magicians(magicians): for magician in magicians: print(magician)def make_great(magicians): great_magicians = [] while magicians: new_magician = magicians.pop() great_magician = "the great " + new_magician great_magicians.append(great_magician) print(great_magicians)magician_list = ['ada1', 'jack1', 'mai1','tom1']check_great = make_great(magician_list)#print(check_great)show_magicians(check_great)TypeError: 'NoneType' object is not iterable为什么会报错？
为什么print（check_great）会返回none？
make_great生成的列表为什么无法赋值给到check_great?
我的目的是调用show_magicians函数打印出make_great函数生成的列表，应该怎样实现呢？ |
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