<\/span><\/h2>\n\n\n\nPython provides ‘+’ operator to concatenate two or more lists. Please note, it creates a new list as a result and does not modify any of the existing lists. Here is its syntax.<\/p>\n\n\n\n
list1 + list2 + ...<\/pre>\n\n\n\nHere is an example to combine two lists using this operator.<\/p>\n\n\n\n
a = [1, 2, 3]
b = [4, 5, 6]
c = a + b
print(c) # output is [1, 2, 3, 4, 5, 6]<\/pre>\n\n\n\nYou can also use it to join more than 2 lists.<\/p>\n\n\n\n
a = [1, 2, 3]
b = [4, 5, 6]
c = [7, 8, 9]
d = a + b + c
print(d) # output is [1, 2, 3, 4, 5, 6, 7, 8, 9]<\/pre>\n\n\n\nPlease note, the ‘+’ operator copies only the shallow copies of each list. If your list contains simple data types such as numbers and strings, this will work as it is. If you need to use deep copies of the lists, then you can call copy.deepcopy() function on the list before concatenation.<\/p>\n\n\n\n
import copy
a = [1, 2, 3]
b = [4, 5, 6]
c = copy.deepcopy(a) + copy.deepcopy(b)
print(c) # output is [1, 2, 3, 4, 5, 6]<\/pre>\n\n\n\nThis operator is available in every Python version and has not restrictions. You can easily use it to concatenate two or more lists.<\/p>\n\n\n\n
Also, please note, if there are any duplicate elements in the list, they will be included as it is in the result, without deduplication.<\/p>\n\n\n\n
a = [1, 2, 3]
b = [1, 2, 3]
c = a + b
print(c) # output is [1, 2, 3, 4, 5, 6]<\/pre>\n\n\n\n