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]

+ operator can be used to concatenate two lists.

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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.

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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.

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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']