original_list=[1,2,3] #Copying list using copy function copied_list=original_list.copy() print(copied_list) #Output:[1, 2, 3] print(original_list) #Output:[1, 2, 3] #checking the id of both original and copied list print(id(original_list)) #Output:27800264 print(id(copied_list)...
You can also make a copy of a list by using the : (slice) operator.Example Make a copy of a list with the : operator: thislist = ["apple", "banana", "cherry"] mylist = thislist[:]print(mylist) Try it Yourself »
Return a shallow copy of the list. Equivalent toa[:].所以应该用 importcopytemp_data=[]temp_dat...
# 浅拷贝 copy模块的copy方法-列表from copy import copy old_list = [1, 2, [3, 4]] new_list = copy(old_list) old_list.append(5) old_list[2][0] += 97 print("Old list:", old_list, "old list id:", id(old_list), " old list[0] id:", id(old_list[2])) print("new ...
def copy(self, *args, **kwargs): # real signature unknown """ Return a shallow copy of the list. """ pass 已经写的很清楚,这是浅拷贝 方式四:使用 copy 模块的 copy 方法 列表 # 浅拷贝 copy模块的copy方法-列表 from copy import copy old_list = [1, 2, [3, 4]] new_list = copy...
Return a deep copy of the list. Input: {"$id":"1","next":{"$id":"2","next":null,"random":{"$ref":"2"},"val":2},"random":{"$ref":"2"},"val":1} Explanation: Node 1's value is 1, both of its next and random pointer points to Node 2. ...
3. 使用copy操作 我们也可以使用 copy() 函数来复制 python 列表,此时original_list 和copyed_list 指向内存中不同的列表对象。 样例代码如下: original_list=[1,2,3] #Copying list using copy function copied_list=original_list.copy() print(copied_list) ...
IndexError: list index out of range 这个错误就是下标越界【下标超出了可表示的范围】 3.2 列表元素的替换 功能:更改列表元素的值 语法:列表名[下标] = 值 list1[index] = 值 list4 = [22, 33, 12, 32, 45] list4[0] = "hello" print(list4[0]) ...
Understand how to copy lists in Python. Learn how to use the copy() and list() functions. Discover the difference between shallow and deep copies.
We only created a so-calledshallow copy. Let's say we have a List of Lists. If we make a copy with one of the above methods and change the inner elements, it still affects the other List as well: a=[[1,2],[3,4]]b=a[:]# or:# b = a.copy()# b = list(a)# b = cop...