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numpy.random.RandomState.bytes
method
RandomState.bytes(length)- 
    
Return random bytes.
Parameters: - 
           
length : int - 
           
Number of random bytes.
 
Returns: - 
           
out : str - 
           
String of length
length. 
Examples
>>> np.random.bytes(10) ' eh\x85\x022SZ\xbf\xa4' #random - 
           
 
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 https://docs.scipy.org/doc/numpy-1.16.1/reference/generated/numpy.random.RandomState.bytes.html