secret_message_task1.py

"""
Task 1 -  
Display the input message at positions that are present in the Fibonacci sequence.
Return the obtained characters capitalized and connected by the '*-*' character.
"""

def main():
    
    # fetching input from users
    message, message_length = get_formatted_input_message()
    
    # getting postions of characters in string which is to be displayed
    positions = list(fibonacci(message_length))
    
    # processing message 
    secret_message = process_message(message, positions)
    
    #displaying processed output message
    print "Secret Message is: {}".format(secret_message)

def process_message(message, pos):
    """
    :param message:Input message
    :param pos: Positions of character to be taken
    :return: Processed message
    """
    return '*-*'.join([message[index] for index in pos]).upper()
    

def get_formatted_input_message():
    """
    :return: Input message from user
    """
    message_length = 0
    message = ''
    while(True):
        message = raw_input("Enter message(len: 1 - 255): ").replace(" ", "")
        message_length = len(message)
        if message_length >= 1 and message_length <= 255:
            break
    return message, message_length


def fibonacci(max_num):
    """
    :param max_num: Max num to which fibonacci series to be displayed
    :return: Fibonacci series up to max_num
    """
    a, b = 0, 1
    while(True):
        yield a
        a, b = b, a + b
        if a >= max_num:
            break

if __name__ == '__main__':
    main()