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Hello Friends “This blog helps you to learn Python programming concepts. You can learn Python language at your own speed and time. One can learn concepts of Python language by practicing various programs given on various pages of this blog. Enjoy the power of Self-learning using the Internet.”
Write a Python Program to Concatenate Two Lists
PROGRAM: Python Program to Concatenate Two Lists
/* Python Program to Concatenate Two Lists */
Example 1: Using + operator
list_1 = [1, 'a']
list_2 = [3, 4, 5]
list_joined = list_1 + list_2
print(list_joined)Output
[1, 'a', 3, 4, 5]
In this example, + operator is used to concatenate two lists.
Example 2: Using iterable unpacking operator *
list_1 = [1, 'a']
list_2 = range(2, 4)
list_joined = [*list_1, *list_2]
print(list_joined)Output
[1, 'a', 2, 3]
* operator allows unpacking inside the list or tuple.
Example 3: With unique values
list_1 = [1, 'a']
list_2 = [1, 2, 3]
list_joined = list(set(list_1 + list_2))
print(list_joined)Output
[1, 2, 3, 'a']
If you want the unique items from a concatenated list, you can use list() and set(). set() selects the unique values and list() converts the set into list.
Example 4: Using extend()
list_1 = [1, 'a']
list_2 = [1, 2, 3]
list_2.extend(list_1)
print(list_2)Output
[1, 2, 3, 1, 'a']
Using extend(), you can concatenate a list to another list as shown in example above.
