invert edge values in python boolean list

2024/10/6 20:27:47

I have a list of booleans like

l = [False, False, False, True, True, True, False, False, True, False, False]

and want to invert every edge value that is False like

[True, True, True, True, True, True, False, False, True, True, True]

What is the most pythonic way to achieve that?

Answer

Possibly there's some clever one-line solution for this, but until someone comes up with it, here's a way to do it with old fashioned iteration:

seq = [False, False, False, True, True, True, False, False, True, False, False]for i in range(len(seq)):if seq[i]:breakseq[i] = Truefor i in range(len(seq)-1, -1, -1):if seq[i]:breakseq[i] = Trueprint(seq)

Result:

[True, True, True, True, True, True, False, False, True, True, True]

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