[Python] How can I remove only consecutive duplicate elements from a list in Python?

I have a list of elements where I want to remove only consecutive duplicates, not all duplicates.

For example: data = [1, 1, 2, 2, 2, 3, 1, 1]

I want to get: [1, 2, 3, 1]

This is different from using set() or dict.fromkeys(), I don’t want to remove all duplicates, just ones that are repeated right after each other.

What I tried:

result = []
for i in data:
if not result or result[-1] != i:
result.append(i)


This works, but I wonder: Is this the cleanest approach, and does it scale well for large lists?

Continue reading...