小编har*_*rry的帖子

我想知道列表变量本身和后跟 [:] 的列表变量之间的区别

例如，

# When nums are List[int] and res are List,
# what is the difference between
res.append(nums[:])
# and 
res.append(nums)

我在实现递归置换函数时提出了我的问题

# When nums are List[int] and res are List,
# what is the difference between
res.append(nums[:])
# and 
res.append(nums)

提前感谢您的帮助！