Error on base64.b64decode() ?!

[Tim Roberts]

Christoph Krammer <redtiger84 at googlemail.com> wrote:

>On 12 Okt., 17:09, Jean-Paul Calderone <exar... at divmod.com> wrote:
>> If you get an incorrect padding error, try appending a "=" and decoding
>> again.  If you get the error again, try appending one more "=".  If it
>> still doesn't work, then you might be out of luck.
>
>This seems to work in some cases, but not all. Whats the deal with
>this adding of "="? Is there an implementation error in python, or are
>other implemenations of base64 more robust then they have to be?

The base64 algorithm converts 3 incoming bytes to 4 encoded bytes.  When
you decode base64, the input string MUST be a multiple of 4 bytes.  Equal
signs are used to pad the strings to 4n bytes.

The web site you used might be doing that alignment for you.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.