python read cvs file float64 to binary string

readdata.py

#!/usr/bin/env python

import struct
import scipy as sp
import numpy as np


def binary(num):
    return ''.join(bin(ord(c)).replace('0b', '').rjust(8, '0') for c in struct.pack('!d', num))

def main():

    data = np.ravel(sp.genfromtxt('a_affirmative_datapoints.txt', skip_header=1, ))
    vbinary = np.vectorize(binary)
    data = vbinary(data).view('S1').reshape(data.size, -1).astype(int)

    pass

if __name__ == '__main__':
      main()