def convert(numb):
    # getting HEX represent, in string, to use it when writing into binary file
    hexNumb = '{0:x}'.format(numb)
    out = ""

    # analyze input number, and compute
    if not capacity == 0:
        # checking power of two
        if log(capacity, 2) % 1 == 0.0 or True:
            # we have valid capacity of our integer.
            # now check the max number to given capacity, else raise an Exception
            if numb > maxInt:
                raise ValueError("Integer %s not filling in %s bytes capacity, Max INT: %s" %
                                                            (numb, capacity, maxInt))

            # starting pushing to output
            for i in _grouper(2, hexNumb.zfill(capacity), '0'):
                # performing modification of izip_longest to string
                i = string.join(i, "")
#                print i
                out += chr(int(i, 16))
                # using statement below when i want a generator
                # yield chr(int(i, 16))
        else:
            raise ValueError("Capacity number must be a log of 2")

    return out

# return normalized data from convert function
def unconvert(numb):
    # using this hack to avoid bug with zero
    h = hexlify(numb)
#    print h
    if not "0"*cap == h:
        h = h.lstrip("0")

    return int(h, 16)