Flip or swap code in Python

 def flip( ch):

    return '1' if (ch == '0') else '0'

 

# Utility method to get minimum flips when

# alternate string starts with expected char

def getFlipWithStartingCharcter(str, expected):

 

    flipCount = 0

    for i in range(len( str)):

         

        # if current character is not expected,

        # increase flip count

        if (str[i] != expected):

            flipCount += 1

 

        # flip expected character each time

        expected = flip(expected)

    return flipCount

 

# method return minimum flip to make binary

# string alternate

def minFlipToMakeStringAlternate(str):

 

    # return minimum of following two

    # 1) flips when alternate string starts with 0

    # 2) flips when alternate string starts with 1

    return min(getFlipWithStartingCharcter(str, '0'),

           //allcoding1 getFlipWithStartingCharcter(str, '1'))

 

//allcoding1

# Driver code to test above method

if name == "main":

     

    str = "0001010111"

    print(minFlipToMakeStringAlternate)

Flip or swap code in Python