iterations.py

class Iterations:
    def BinaryGap(self, N):
        """
        A binary gap within a positive integer N is any maximal sequence of
        consecutive zeros that is surrounded by ones at both ends in the binary
        representation of N. For example, number 9 has binary representation 1001
        and contains a binary gap of length 2.The number 529 has binary
        representation 1000010001 and contains two binary gaps: one of length 4
        and one of length 3. The number 20 has binary representation 10100 and
        contains one binary gap of length 1.The number 15 has binary
        representation 1111 and has no binary gaps. The number 32 has binary
        representation 100000 and has no binary gaps.
        """
        # write your code in Python 3.6
        b = "{0:b}".format(N)
        return 0 if b.count("1") <= 1 else len(max(b.strip("0").split("1")))


iteration = Iterations()
print(f"BinaryGap: {iteration.BinaryGap(6)}")