打印列表
def show_magicians(magicians):
for magician in magicians:
print(magician)
修改列表
def make_great(magicians):
for i in range(3):
magicians[i] = "the Great " + magicians[i]
return magicians
magicians = [‘one’,‘two’,‘three’]
changed_list=(make_great(magicians[:]))#传入副本并且存储在新的列表中
show_magicians(changed_list)#打印修改后的列表
show_magicians(magicians)#打印原列表