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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def keyboard_input(message, yesno=False):
 """ Get keyboard input from a human, optionally reasking for valid yes or no input. Parameters message : :obj:`str` the message to display to the user yesno : :obj:`bool` whether or not to enforce yes or no inputs Returns ------- :obj:`str` string input by the human """

    # add space for readability
    message += ' '

    # add yes or no to message
    if yesno:
        message += '[y/n] '

    # ask human
    human_input = input(message)
    if yesno:
        while human_input.lower() != 'n' and human_input.lower() != 'y':
            logging.info('Did not understand input. Please answer \'y\' or \'n\'')
            human_input = input(message)
    return human_input