weilianlongxia的博客

print(‘今晚，我邀请了’+len(names)+‘位嘉宾’) Traceback (most recent call last): File “<pyshell#197>”, line 1, in print(‘今晚，我邀请了’+len(names)+‘位嘉宾’) TypeError: can only concatenate str (not “int”) to str...

python复制列表——切片法 用切片法复制列表，以备用是个容易遗忘的技巧。 friend_foods = my_foods[:] 结合函数时： print_models(unprinted_designs[:],completed_models)

AttributeError: ‘ElectricCar’ object has no attribute ‘battery’ Battery大小写不一致。