new_history = ('中国历史','日本历史','韩国历史') new_code = ('python','django','flask') manhua.extend(new_manhua) history.extend(new_history) code.extend(new_code) print(manhua,history,code) history.extend(manhua) del manhua print(history) 运行结果: 代码语言:javascript 代码运行次数:0...
Python 3.6.9,dis库是Python自带的一个库,可以用来分析字节码,而字节码是CPython解释器的实现细节。 1. 引言 在Python中,扩展list的方法有多种,append,extend,+=,+都是列表扩展的方式,但它们的使用又有些许不同,需要根据具体情况来选择,本文主要分析它们的差异。
Output:You can see below from the Python code that to append a single value takes less time than to extend a single value in Python. 0.08402279997244477 // Run time of single append value 0.10593359998892993 // Run time of single extend value Now, I will check which is fast toappend multip...
Python中append()与extend()的区别 列表方法append()和extend()之间的差异: append:在最后追加对象 结果 [1, 2, 3, [4, 5]] extend:通过追加加迭代中的元素来扩展列表。 结果 [1, 2, 3, 4, 5] 作者:阿里妈妈 链接:www.pythonheidong.com/blog/article/40/......
new_history=('中国历史','日本历史','韩国历史') new_code=('python','django','flask') manhua.extend(new_manhua) history.extend(new_history) code.extend(new_code) print(manhua,history,code) history.extend(manhua) delmanhua print(history) 运行结果:/Users/llq/PycharmProjects/pythonlearn/...
Code: Python # Creating a list my_list = [1, 2, 3] my_tuple = (2, 6, 7) # Using the extend function to add elements to the list my_list.extend(my_tuple) # Printing the updated list print(my_list) Output: [1, 2, 3, 2, 6, 7] Explanation: In the above code, we have...
Here, we will create the demo 2D Python list of integers that we will attach a new element to. Therefore, in your preferred Python IDE, run the line of code below:my_2Dlist = [[1, 2], [3, 4], [5, 6]] print(my_2Dlist) # [[1, 2], [3, 4], [5, 6]] print(type(my...
python 中extend的用法 python中extend的用法 Title: Understanding the Usage of 'extend' in Python Introduction:Python is a widely-used, high-level programming language known for its simplicity and readability. It offers various built-in functions to manipulate data structuresefficiently. One such useful...
Python的数据类型: 数值型: int、float、complex(实数和虚数)、bool 序列对象: str、list、tuple 键值对: set(集合)、dict(字典) 数字的处理函数: int():取整 round():四舍六入五取偶(银行家算法) math.floor():向下取整 math.ceil():向上取整 min():取最小 max():取最大 pow(x,y):幂运算(......
Run Code Python extend() Vs append() If you need to add the item itself (rather than its elements), use theappend()method. a1 = [1,2] a2 = [1,2] b = (3,4)# add items of b to the a1 lista1.extend(b)# [1, 2, 3, 4]print(a1)# add b itself to the a1 lista2.appe...