The certificates are misconfigured, you get the following error mesage:
ssl.CertificateError: hostname u'zdf-hdios-none-i.zdf.de' doesn't match either of 'a248.e.akamai.net', '*.akamaihd.net', '*.akamaihd-staging.net', '*.akamaized.net', '*.akamaized-staging.net'
1. Renamed to encode_base_n()
2. Allow tables longer than 62 characters
3. Raise ValueError instead of AssertionError for invalid input data
4. Return the first character in the table instead of '0' for number 0
5. Add tests