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"Unable to find a valid Python installation" error, a python__define error ? [message #91773]

Tue, 25 August 2015 04:16

Kallisthène
Messages: 15
Registered: October 2012

Junior Member

Dear all,

I had difficulties using the Python bridge with my own winpython installation and I received the 'Unable to find a valid Python installation.' error message.

Thus after spending a lot of time in Windows innards, I just opened the python__define.pro file and found the following piece of code :

; Determine which Python version to load.
SPAWN, ['python', '--version'], stdout, stderr, /noshell
if (stderr[0].Contains('Python 2.7')) then begin
DLM_LOAD, 'Python27'
endif else if (stderr[0].Contains('Python 3.4')) then begin
DLM_LOAD, 'Python34'
endif else begin
MESSAGE, 'Unable to find a valid Python installation.'
endelse

Simply by replacing stderr[0] by the correct stdout[0] I succeeded in fully using Python in IDL as well as the IDL notebook.

What is strange is that a previous anaconda installation worked perfectly well, as well as an earlier winpython 2.7. I have no explanation.

By the way, the 3.5 Python will be released in one month, maybe you should update this piece of code ?

Hope it helps those with similar issues

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[Message index]

		"Unable to find a valid Python installation" error, a python__define error ? By: Kallisthène on Tue, 25 August 2015 04:16
		Re: "Unable to find a valid Python installation" error, a python__define error ? By: chris_torrence@NOSPAM on Tue, 25 August 2015 09:11
		Re: "Unable to find a valid Python installation" error, a python__define error ? By: Kallisthène on Thu, 13 October 2016 08:08
		Re: "Unable to find a valid Python installation" error, a python__define error ? By: Dick Jackson on Thu, 13 October 2016 08:36
		Re: "Unable to find a valid Python installation" error, a python__define error ? By: chris_torrence@NOSPAM on Thu, 13 October 2016 09:02
		Re: "Unable to find a valid Python installation" error, a python__define error ? By: Kallisthène on Fri, 14 October 2016 00:02

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