Reports

def convert(val):
     # val is an integer 16 bit   
     valb = '{:16b}'.format(val).strip()
     return ' '.join([valb[i-5:i-1] for i in range(0,-len(valb),-4)][::-1])

Outputs

convert(int('F0F0',16))
Out[1]: '111 1000 0111 1000'
convert(int('001011001010',2))
Out[2]: '1 0110 0101'

If you do want to keep zero you can replace it by :

def convert(val):
     # val is an integer 16 bit   
     valb = '{:16b}'.format(val).replace(' ','0')
     return ' '.join([valb[i-5:i-1] for i in range(0,-len(valb),-4)][::-1])

Output will be:

convert(int('001011001010',2))
Out[3]: '000 0001 0110 0101'

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