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Set update() in Python to do union of n arrays
In this tutorial, we are going to write a program that uses set update method to union multiple arrays. And it will return a resultant one-dimension array with all unique values from the arrays.
Let's see an example to understand it more clearly.
Let's see an example to understand it more clearly.
Input
arrays = [[1, 2, 3, 4, 5], [6, 7, 8, 1, 2, 3, 4, 5], [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]]
Output
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
Follow the below steps to write the program.
- Initialize the array as shown in the example.
- 3Create an empty.
- Iterate over the arrays.
- In each iteration, use the update method of the set to add new unique elements to the
- Convert the set to list and print it.
Example
# initialzing the array arrays = [[1, 2, 3, 4, 5], [6, 7, 8, 1, 2, 3, 4, 5], [1, 2, 3, 4, 5, 6, 7, 8, 9,10]] # empty set result = set() # iterating over the arrays for array in arrays: # updating the set result.update(array) # converting and printing the set in list print(list(result))
Output
If you run the above code, then you will get the following result.
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
Conclusion
If you have any doubts in the tutorial, mention them in the comment section.
Updated on: 11-Jul-2020
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