[Hidden-tech] Python 3.7 on Mac

[David Greenberg]

Got it. I put this at the top of the file:

#!/Library/Frameworks/Python.framework/Versions/3.7/bin/python3

and it worked. Thanks!

On Sun, Mar 31, 2019 at 3:59 PM Robert Heller <heller at deepsoft.com> wrote:

> At Sun, 31 Mar 2019 14:49:04 -0400 David Greenberg <
> david.greenberg3 at gmail.com> wrote:
>
> >
> >
> >
> > Hi All,
> > I've got it installed and running, but I can't figure out how to make it
> > the default as far as Apache is concerned. I have an extremely simple
> > script:
> >
> > #!/usr/bin/env python
> > print ("Content-Type: plain;charset=utf-8\r\n")
> > print()
> >
> > print("Hello World!")
> >
> > which runs as a Python 2.7 script as expected after enabling
> > LoadModule cgi_module libexec/apache2/mod_cgi.so
> > in https.conf, but if I try to change 'python' to 'python3' I get a 500
> > error and the Apache error log says:
> >
> > [Sun Mar 31 13:34:38.253331 2019] [cgi:error] [pid 26370] [client
> > ::1:52412] End of script output before headers: testLocalHost.py
> >
> > I tried adding the two lines below in httpd.conf but that just resulted
> in
> > the same 500 error.
> >
> > LoadModule wsgi_module
> >
> /Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/mod_wsgi/server/
> > mod_wsgi-py37.cpython-37m-darwin.so
> > WSGIPythonHome /Library/Frameworks/Python.framework/Versions/3.7
> >
> > I was on the verge of trying this:
> >
> > ln -s /Library/Frameworks/Python.framework/Versions/3.7 /usr/bin/python3
> >
> > but since I really don't know what I'm doing, I got cold feet and decided
> > to ask for help. Thanks.
>
> This is one option, but I am guessing it really should be:
>
> ln -s /Library/Frameworks/Python.framework/Versions/3.7/python3
> /usr/bin/python3
>
> (or something like that, depending on the actual program name, and I'm
> guessing it isn't "3.7", which is more likely a directory name containing
> the
> program, unless the the "3.7" directory contains a whole tree (eg, bin/,
> lib/,
> etc.), in which case you would need to include that:
>
> ln -s /Library/Frameworks/Python.framework/Versions/3.7/bin/python3
> /usr/bin/python3
>
>
> The other is to just replace '#!/usr/bin/env python' at the top of your
> scripts with '#!/Library/Frameworks/Python.framework/Versions/3.7/python3'
> (or
> whatever is the name of the actual executable, presumable under
> /Library/Frameworks/Python.framework/Versions/3.7/ -- it could just be
> python
> or it might be python3.7 and it is entirely possible any of these (with
> two
> already being symlinks).
>
> The '#!/usr/bin/env python' hack is great when running from the command
> line
> in a shell terminal, but rarely works well otherwise, since the
> environment
> for other environments is harder to control or even know what it is.  For
> something like a CGI script running from a webserver it is just better to
> explicitly and specificly name the executable you want to run.
>
> Oh, and the Content-Type: should be "text/plain", not just "plain".
>
> >
> > David
> >
> > MIME-Version: 1.0
> >
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>
>
> --
> Robert Heller             -- 978-544-6933
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>
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