'Initialize CertificateSection Page
:param container: Container Page Object of the certificate section
:param prefix: css selector of the container element
:param index: index of section in the certificate list on the page
:return:'

def __init__(self, container, prefix, index):

    self.selector = (prefix + '    .certificates-list-item-{}'.format(index))
    self.index = index
    super(CertificateSectionPage, self).__init__(container.browser, **container.course_info)
