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In : bitarray([True, False])
Out: bitarray('10')

In : bitarray('1') + bitarray('0')
Out: bitarray('10')

In : bitarray('1') + True
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-93-3d90d100a032> in <module>()
----> 1 bitarray('1') + True

TypeError: could not extend bitarray

In : bitarray(True)   # here it interprets True as the integer 1  => int(True)
Out: bitarray('1')

In : bitarray(False)
Out: bitarray()

In : a = 2 * bitarray('1') + 2 * bitarray('0') + 2 * bitarray('1') + bitarray(False) + bitarray(True)
In : a
Out: bitarray('1100111')
# it misses the false because it evaluate as bitarray() -> zero length

a = 10 * bitarray('1')

In : a
Out: bitarray('1111111111')

In : a[5] = '0'

In : a
Out: bitarray('1111111111')

a = 10 * bitarray('0')

In [116]: a
Out[116]: bitarray('0000000000')

In [117]: a[5:6] = 10 * bitarray('1')   # is normal to extend by default?? this is like an oveflow??)

In [118]: a
Out[118]: bitarray('0000011111111110000')