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Python: Unique values in a given list of lists

Python List: Exercise - 183 with Solution

Write a Python program to get the unique values in a given list of lists.

Sample Solution:

Python Code:

def unique_values_in_list_of_lists(lst):
    result = set(x for l in lst for x in l)
    return list(result)
nums = [[1,2,3,5], [2,3,5,4], [0,5,4,1], [3,7,2,1], [1,2,1,2]]
print("Original list:")
print(nums)
print("Unique values of the said list of lists:")
print(unique_values_in_list_of_lists(nums))
chars = [['h','g','l','k'], ['a','b','d','e','c'], ['j','i','y'], ['n','b','v','c'], ['x','z']]
print("\nOriginal list:")
print(chars)
print("Unique values of the said list of lists:")
print(unique_values_in_list_of_lists(chars))

Sample Output:

Original list:
[[1, 2, 3, 5], [2, 3, 5, 4], [0, 5, 4, 1], [3, 7, 2, 1], [1, 2, 1, 2]]
Unique values of the said list of lists:
[0, 1, 2, 3, 4, 5, 7]

Original list:
[['h', 'g', 'l', 'k'], ['a', 'b', 'd', 'e', 'c'], ['j', 'i', 'y'], ['n', 'b', 'v', 'c'], ['x', 'z']]
Unique values of the said list of lists:
['e', 'd', 'c', 'b', 'x', 'k', 'n', 'h', 'g', 'j', 'i', 'a', 'l', 'y', 'v', 'z']

Pictorial Presentation:

Python List: Unique values in a given list of lists.

Flowchart:

Flowchart: Unique values in a given list of lists.

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Previous: Write a Python program to calculate the maximum and minimum sum of a sublist in a given list of lists.
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Python: Tips of the Day

Floor Division:

When we speak of division we normally mean (/) float division operator, this will give a precise result in float format with decimals.

For a rounded integer result there is (//) floor division operator in Python. Floor division will only give integer results that are round numbers.

print(1000 // 300)
print(1000 / 300)

Output:

3
3.3333333333333335