print out binary representation of c type in python

Question

I have the following number in C/C++, for example, 0x0202020202ULL and I\'d like to print it out in binary form 1000000010000000

Answer 1

You can use a combination of slicing(or str.rstrip), int and format.

>>> inp = '0x0202020202UL'
>>> format(int(inp[:-2], 16), 'b')
'1000000010000000100000001000000010'
# Using `str.rstrip`, This will work for any hex, not just UL
>>> format(int(inp.rstrip('UL'), 16), 'b')
'1000000010000000100000001000000010'

Update:

from itertools import islice
def formatted_bin(inp):
   output = format(int(inp.rstrip('UL'), 16), 'b')
   le = len(output)
   m = le % 4
   padd = 4 - m if m != 0 else 0
   output  = output.zfill(le + padd)
   it = iter(output)
   return ' '.join(''.join(islice(it, 4)) for _ in xrange((le+padd)/4))

print formatted_bin('0x0202020202UL')
print formatted_bin('0x10')
print formatted_bin('0x101010')
print formatted_bin('0xfff')

output:

0010 0000 0010 0000 0010 0000 0010 0000 0010
0001 0000
0001 0000 0001 0000 0001 0000
1111 1111 1111