New in version 2.0.
True when expr is a sequence and all elements in expr are nonnegative integer powers of two:
abjad> from abjad.tools import sequencetools
abjad> sequencetools.all_are_nonnegative_integer_powers_of_two([0, 1, 1, 1, 2, 4, 32, 32])
True
True when expr is an empty sequence:
abjad> sequencetools.all_are_nonnegative_integer_powers_of_two([])
True
False otherwise:
abjad> sequencetools.all_are_nonnegative_integer_powers_of_two(17)
False
Return boolean.