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pythonarraysbooleantoggle

How do I toggle a boolean array in Python?

Say I have the following array:

[True, True, True, True]

How do I toggle the state of each element in this array?

Toggling would give me:

[False, False, False, False]

Similarly, if I have:

[True, False, False, True]

Toggling would give me:

[False, True, True, False]

I know the most straightforward way to toggle a boolean in Python is to use "not" and I found some examples on stackexchange, but I'm not sure how to handle it if its in an array.

Solution

  • Using not is still the best way. You just need a list comprehension to go with it:

    >>> x = [True, True, True, True]
>>> [not y for y in x]
[False, False, False, False]  
>>> x = [False, True, True, False]
>>> [not y for y in x]
[True, False, False, True]
>>>

    I'm pretty sure my first solution is what you wanted. However, if you want to alter the original array, you can do this:

    >>> x = [True, True, True, True]
>>> x[:] = [not y for y in x]
>>> x
[False, False, False, False]
>>>