+ operator to merge two lists in Python. There are several ways to merge, or concatenate, two or more lists in Python. But this one is the easiest way.
joinedlist = listone + listtwo
Python merges two lists
Simple example code.
list_one = [1, 2, 3] list_two = [4, 5, 6] res = list_one + list_two print(res)
Or you can merge two lists are by appending all the items from list2 into list1, one by one:
list1 = ["a", "b" , "c"] list2 = [1, 2, 3] for x in list2: list1.append(x) print(list1)
What is the fastest way to merge two lists in python?
Answer: You can just use concatenation:
list_1 = [1,2,3,4] list_2 = [5,6,7,8] list = list_1 + list_2
If you don’t need to keep list_1 around, you can just modify it using
.extend() if you want to merge in place. They are significantly faster.
Do comment if you have any doubts or suggestions on this Python list merge topic.
Note: IDE: PyCharm 2021.3.3 (Community Edition)
All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.