duplicate a list python code example

Example 1: how to make python remove the duplicates in list

mylist = ["a", "b", "a", "c", "c"]
mylist = list(dict.fromkeys(mylist))

  print(mylist)

Example 2: copy a list python

new_list = old_list.copy()
# or
new_list = old_list[:]

Example 3: duplicate in list python

a = [1,2,3,2,1,5,6,5,5,5]

import collections
print([item for item, count in collections.Counter(a).items() if count > 1])

## [1, 2, 5]

Example 4: python remove duplicates from list

''' we can convert the list to set and then back to list'''
a=[1,1,2,3,4,5,6,6,7]
'''b=(list(set(a))) # will have only unique elemenets'''

Example 5: copy one list to another python

thislist = ["apple", "banana", "cherry"]
mylist = thislist.copy()
print(mylist)

Example 6: python duplicate list elements

def duplicate_list_elements(_list : list):
    duplicated_list = []

    for element in _list:
        duplicated_list.append(element)
        duplicated_list.append(element)

    return duplicated_list