Python merges two lists without duplicates could be accomplished by using a set. And use the + operator to merge it.
list(set(list1 + list2))Python merge list without duplicates example
Simple example code using set with + operator.
a = ['hello', 'world']
b = ['hello', 'universe']
unique = list(set(a + b))
print(unique)
Output:
Another method uses NumPy
You have to import a NumPy module for it.
import numpy as np
list1 = [1, 2, 2, 5]
list2 = [2, 5, 7, 9]
res = np.unique(list1 + list2)
print(res)
Output: [1 2 5 7 9]
Combining two lists and without duplicates and don’t remove duplicates in the original list
Use set to remove duplicate without removing element from the original list.
list1 = [1, 2, 2, 5]
list2 = [2, 5, 7, 9]
res = list(set(list1 + list2))
print(res)
print(list1)
print(list2)Output:
[1, 2, 5, 7, 9]
[1, 2, 2, 5]
[2, 5, 7, 9]
You can do also convert the list to a new set.
set_1 = set(list_1)
set_2 = set(list_2)Do comment if you have any questions or suggestions on this Python list topic.
Note: IDE: PyCharm 2021.3.3 (Community Edition)
Windows 10
Python 3.10.1
All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.