normalise_spaces

def normalise_spaces(string):
    flg = False
    normalise_string = ""
    for char in string:
        if char != ' ':
            normalise_string += char
            if flg == True: flg = False
        if char == ' ':
            if flg == False:
                normalise_string += char
                flg = True
    return normalise_string


normalise_spaces("   Hello Geeks . Welcome   to  GeeksforGeeks   .    ")