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Python: Remove duplicates from a list of lists

Python List: Exercise - 69 with Solution

Write a Python program to remove duplicates from a list of lists.

Sample Solution:-

Python Code:

import itertools
num = [[10, 20], [40], [30, 56, 25], [10, 20], [33], [40]]
print("Original List", num)
num.sort()
new_num = list(num for num,_ in itertools.groupby(num))
print("New List", new_num)

Sample Output:

Original List [[10, 20], [40], [30, 56, 25], [10, 20], [33], [40]]                                            
New List [[10, 20], [30, 56, 25], [33], [40]] 

Pictorial Presentation:

Python List: Remove duplicates from a list of lists.

Flowchart:

Flowchart: Remove duplicates from a 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