> On 20 Aug 2017, at 05:56, Nick Coghlan <ncogh...@gmail.com> wrote:
> 
> On 20 August 2017 at 05:27, Ian Hartley <iahar...@ucsd.edu 
> <mailto:iahar...@ucsd.edu>> wrote:
> Hi all,
> 
> I'm using PyCharm CE as my development environment, on a macintosh running 
> mac OS 10.12.3.
> 
> Ah, that would explain why my intuitions were all wrong - I know how the 
> Windows and *nix installation models work (and I believe the latter also 
> covers homebrew on macOS), but not how the macOS framework installers work :)

FWIW: The framework installers on python.org <http://python.org/> work just 
like the other installers on upgrades: installing 3.6.2 on a system already 
running 3.6.1 replaces the 3.6.1 installation and doesn’t perform a 
side-by-side installation. The major differences w.r.t. a *nix installation are 
having an “odd” sys.prefix, and having different sys.prefix values for 
different feature releases.

Ronald
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