human
What is a the Python program you requested given the following:
Complete the below
def create_url_helper(base_url):

    ''''A function to generate ``url_for`` helpers.'
    '''
assistant
#Here is the Python program you requested.
    base_url = base_url.rstrip('/')
    def url_for(path=''):
        if path:
            path = ('/' + path.strip('/'))
        return (base_url + path)
    return url_for