Python List remove duplicate elements














































Python List remove duplicate elements



To remove duplicate elements from the list, you need to use set() method which allows only unique keys.

Program:

This program is tested on python 3.7.

# To remove duplicates from a list, you needs
# to use set() method. set() is a special method
# in python which allows only uniques keys

# This function will work with all the type of lists
# like as list of integer, list of string, list of
# interger and string both, list of float etc.

def remove_duplicates_from_list(_list):
    return list(set(_list))

def main():
    # Remove duplicates from the list and store it in new list
    list_1 = [1, 2, 3, 4, 5, 5, 2, 1]
    list_2 = remove_duplicates_from_list(list_1)
    print (list_1)
    print (list_2)

    # Remove duplicates and store in the same list
    list_3 = [11, 22, 33, 44, 55, 66, 55, 33, 11]
    print (list_3)
    list_3 = remove_duplicates_from_list(list_3)

    # Remove duplicates from list of various types
    list_4 = [10, 20, "cppsecrets", 20, 30, ".com", 30, 40, "cppsecrets", ".com", "cppsecrets.com"]
    list_5 = remove_duplicates_from_list(list_4)
    print (list_4)
    print (list_5)

if __name__ == '__main__':
    main()

Output:

[1, 2, 3, 4, 5, 5, 2, 1]
[1, 2, 3, 4, 5]
[11, 22, 33, 44, 55, 66, 55, 33, 11]
[10, 20, 'cppsecrets', 20, 30, '.com', 30, 40, 'cppsecrets', '.com', 'cppsecrets.com']
['cppsecrets.com', 40, 10, 'cppsecrets', 20, '.com', 30]

More Articles of Raviprakash Singh:

Name Views Likes
Python List find out the Max value 371 10
Python clear to List. 387 10
Python List to clone or copy a list 380 10
Python List check empty or not. 366 10
Python List multiply of all the items in a list 430 10
Python reverse to the List 460 10
Python List remove duplicate elements 413 10
Python sort to the List 358 10
Python extend() method for list. 376 10
Python append an item in list. 370 10
Python List find out the Minimum value 354 10
Python pip installation on windows 7 or windows 8. 421 16
Python print Current Date and Time. 431 11
Python remove element from List. 386 10

Comments