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I know array.array allows to have int/float array. How to have bool array? Memory efficient. so that 1 value is stored as 1 bit. does array support it?

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    probably not ... and if that concerns you , python may not be the ideal language for this project Commented Sep 16, 2013 at 21:58
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    array.array isn't numpy. Commented Sep 16, 2013 at 21:59

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As far as I know there is nothing to store booleans this efficiently in native Python, but you can checkout the bitarray library which is I think what you are looking for.

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I've seen some stability issues with bitarray. There seems to be a segfault affecting the itersearch method, at least. I'm not sure whether the module is actively maintained, so there might not be fixes coming.
I did not have any problem while using it with Python 3 (for what I used it at least). I checked out the Github issue you are probably talking about but I could not reproduce it. Are you still having the same issue?
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>>> sys.getsizeof(int)
436
>>> sys.getsizeof(bool)
436
>>> sys.getsizeof(bool())
12
>>> sys.getsizeof(int())
12
>>>

basically even if you could you would not get any space saving ...

this may also be of interest

"sys.getsizeof(int)" returns an unreasonably large value?

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This doesn't help me with "array" sctruct.
it was more to demonstrate that a bool is more than 1 bit in python
Ye, i know, so I need "not native" struct.

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