def print_models(unprinted_designs,completed_models):
#模拟打印
while unprinted_designs:
unprinted_designs.reverse()#从列表头开始打印
current_design=unprinted_designs.pop()
print(f"Printing model：{current_design}")
completed_models.append(current_design)
def show_completed_models(completed_models):
#显示打印好的模型
print("nThe following models have been printed:")
for completed_model in completed_models:
print(completed_model)
unprinted_models=['hands','heads','body','legs','feet']
completed_models=[]
print_models(unprinted_models,completed_models)
show_completed_models(completed_models)
#创建副本避免修改原列表,实际还是切片表示法
print(list[:])#副本
Printing model：hands
Printing model：feet
Printing model：heads
Printing model：legs
Printing model：body
The following models have been printed:
hands
feet
heads
legs
body
list[slice(None, None, None)]
>>>
