More tkinter Madness

[Michael Torrie]

On 11/12/2015 05:25 PM, Tim Daneliuk wrote:
> On 11/11/2015 08:25 PM, Chris Angelico wrote:
>> On Thu, Nov 12, 2015 at 12:52 PM, Tim Daneliuk
>> <tundraBOGUS at tundraware.com> wrote:
>>> I am the author of twander (https://www.tundraware.com/Software/twander).
>>> This code has run flawlessly for years on FreeBSD, Linux, MacOS and
>>> Windows.  Some months ago, I put it on a couple of VPS servers (FreeBSD
>>> and Linux) and BOOM, it doesn't run.  I asked around here and got some
>>> suggestions and then did some homework.
>>>
>>> Traceback (most recent call last):
>>>   File "/usr/lib64/python2.6/runpy.py", line 122, in _run_module_as_main
>>
>> It's running here under Python 2.6. Sorry if this is a question you've
>> already been asked, but were you successfully running under 2.6
>> elsewhere? Might be a versioning issue.
>>
>> ChrisA
>>
> 
> It always ran OK on every previous version of Python from about 2.4 forward
> on VMs, physicals, *nix, OSX, Windows, etc.

And other X11 apps are working fine on the test VPS where your app
crashes? Other Tk apps?  Other Python Tk apps?

Your app runs fine on my VPS (Linode), running CentOS 7, Python 2.7.
Also runs fine on my CentOS 6 VM (also Linode), Python 2.6.6.

I also verified that if X11 forwarding is not working, Python reports an
exception "_tkinter.TclError: no display name and no $DISPLAY
environment variable" immediately, so that's definitely not your problem.