>>> import numpy as np
>>> b = np.array([True, False, False, True])
>>> b.dtype
dtype('bool')
>>> c = np.array([1+2j, 2-1j, 2+4*1j])
>>> c.dtype
dtype('complex128')
>>> f = np.array(['one', 'two', 'three', 'four'])
>>> f.dtype
dtype('<U5')
>>> f = np.array([b'one', b'two', b'three', b'four'])
>>> f.dtype
dtype('S5')
>>>
unicode strings with maximal 5 characters
ascii (bytes) strings with maximal 5 characters