[Python-Dev] RFC: Backport ssl.MemoryBIO and ssl.SSLObject to Python 2.7

Victor Stinner victor.stinner at gmail.com
Thu Jun 8 06:36:42 EDT 2017

2017-06-08 10:30 GMT+02:00 Cory Benfield <cory at lukasa.co.uk>:
> This is what I was worried about. Moving to require PyOpenSSL *also* locks
> us out of Jython support, at least for the time being. That’s another point
> in the “con” column for making PyOpenSSL a mandatory dependency.

Even if we do backport MemoryBIO to the next Python 2.7.14, I don't
think that you can require MemoryBIO. What about all existing
operating systems which provide a Python 2.7 without MemoryBIO? You
need to have a workaround anyway. For example, make the new
asynchronous API optional and use the old blocking mode in the


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