Komodo using python from QGis distribution

Support
1

Hi there,

I’m using geographical information system QGIS which is delivered with an python environment. This python environment has some extensions embedded, which cannot currently be installed on windows systems otherwise (at least I failed several times …).

Therefore I want to use the QGIS python for my development.

Trying to use the delivered python interpreter within KomodoIDE (by setting the path to python.exe within preferences->python->default python interpreter), Komodo says:

Invalid python interpreter . The chosen Python has version, which will not work as python interpreter

Checking the version of the delivered python, it’s version 2.7.5

Does Komodo not support debugging 2.7.5 - or what is wrong here?

Any hints appreciated - TIA

Hoppfrosch

2

Hi, when checking a given Python executable for validity, Komodo runs that exe with the following arguments:

python.exe -c "import sys; sys.stdout.write(sys.version)"

From Komodo’s error message, it is not getting a recognized version string. This may happen with custom Python builds. In that case, please post the version string, and we’ll go from there.

3

You shouldn’t be doing this. That’s a custom Python 2.7 install with custom packages that will differ from a standard Python install. Also if were install additional packages uses that interpreter it could break Komodo completely. If you need a Python interpreter ActiveState distributes mutliple versions for all platforms, including Windows:
http://downloads.activestate.com/ActivePython/releases/

It is odd that it says it’s not a proper Python interpreter according to Komodo though. I’m interested to see what Mitchell’s instructions produce.

  • Carey
4

I have to do this, as this distribution includes some packages which aren’t available through ActiveState Python (especially pyspatialite) I already tried to install this package manually as well (using ActiveState Python) - but without success.
Also as QGIS relies on its own python and is not able to use another python (as far as I have seen) and I don’t plan to use python for anything else yet (as I’m mostly a Perl-man), I don’t want two python distributions installed.
It’s a pity - so I have to use anything like pdb (or any other debugger) … :unamused:

@mitchell:

V:\QGIS 2.18>python.exe -c “import sys; sys.stdout.write(sys.version)”
results in
2.7.5 (default, May 15 2013, 22:44:16) [MSC v.1500 64 bit (AMD64)]

6

Sorry @hoppfrosch1, I was confused by your wording. It sounded like you configured Komodo to use Komodo’s Python (Komodo Install/lib/python). I now see you meant the QGIS Python. My bad, you should definitely be able to do this.

@mitchell would be the pro here, sorry to have interjected.

  • Carey
7

Ok give this a try, this would set the pref for your Python interpreter without validating the input. Keep in mind that you are exploring new territories here though.

require("ko/prefs").setString("pythonDefaultInterpreter", "C:\path\to\python.exe")

You can run that in the console widget (bottom pane).

8

Opened a bug here:

9

That looks like a proper version string. Is there anything in your Help > Troubleshooting > View Log File related to the error? I think the error is occurring before the version check. (Thus Komodo is rejecting the executable for some reason.)

10

Sorry fot the late response - I was Out of Office the last days…

Here is the entry of Help>Troubleshooting>View Log File concerning this problem:

[2017-01-12 06:40:29,312] [ERROR] koAppInfo: Failed to check version of executable V:\QGIS 2.18\bin\python.exe
Traceback (most recent call last):
  File "D:\Usr\programme\ActiveState Komodo IDE 10 nightly\lib\mozilla\components\koAppInfo.py", line 190, in _isValidExecutable
    isvalid = self._isValidExecutableVersion(exe)
  File "D:\Usr\programme\ActiveState Komodo IDE 10 nightly\lib\mozilla\components\koAppInfo.py", line 162, in _isValidExecutableVersion
    versionParts = invocationutils.split_short_ver(ver, intify=True)
  File "D:\Usr\programme\ActiveState Komodo IDE 10 nightly\lib\mozilla\python\komodo\invocationutils.py", line 94, in split_short_ver
    raise ValueError("%r is not a valid short version string" % ver_str)
ValueError: '' is not a valid short version string
11

@careyh: No problem - as I’m not a native english speaker, my wording might be confusing anytime … :smirk:

@nathanr: Using the given command in the console widget solves my pain … Thanks!

Let’s see, when the next problems occur! :smirk:

12

There’s a slight discrepancy I’d like to clear up. In the version string you gave, you executed “python.exe” from the “V:\QGIS 2.18” directory, but your “python.exe” is located in “V:\QGIS 2.18\bin”. Please run python.exe -c "import sys; sys.stdout.write(sys.version)" from “V:\QGIS 2.18\bin”. That way we can make sure that you are running the correct python.exe, and not another one in your %PATH%.

13

@mitchell : The result is:

V:\QGIS 2.18>python.exe -c "import sys; sys.stdout.write(sys.version)"
2.7.5 (default, May 15 2013, 22:44:16) [MSC v.1500 64 bit (AMD64)]

This has to be, since you have to start a separate shell if you want to use python from QGIS. The shell startup-script sets all the correct pathes.

NathanR’s solution with manually setting PythonInterpreter via Komodo console works - as far as I have verified. I only added a few pathes to “Additional Python Import directories” within the Komodo preferences

15

So you’re saying you started a QGIS shell, which dumped you to “V:\QGIS 2.18”, set up all your paths correctly, and running “python.exe” cannot be any other exe than the QGIS exe in “V:\QGIS 2.18\bin”?

16

Yes - that’s what I’m saying.

My path env within the running shell:

Path=V:\QGIS 2.18\apps\Python27\Scripts;V:\QGIS 2.18\bin;C:\Windows\system32;C:\Windows;C:\Windows\WBem

17

Thanks. I cannot think of any reason why that version string should cause a failure. Other than the workaround Nathan gave you, I do not know how to solve this issue.