What's the difference between hitting 'Run' vs. typing 'runfile()'?

[Lucian Smith]

I have an odd problem with the way my python library interacts with Spyder, and I'm hoping someone here can shed some insight into what's happening.

The upshot is:  I get different behavior based on whether I hit the 'Run' button in Spyder vs. typing the 'runfile(...)' command that 'Run' produces into the console.  It has something to do with piping warnings/messages to the console window.  I'm hoping to figure out how to debug my library based on what, specifically, the difference is between those two activities.

If I hit 'Run', the following happens:

* The text 'runfile(...)' appears in the Console.

* The file executes and produces output

* The next prompt appears ('In [2]: ')

* A split second later, a warning from my library appears above the prompt.

If I then hit 'Run' again, the following happens:

* The text 'runfile(...)' appears in the Console.

* The file executes and produces output

* The next prompt appears ('In [3]: ')

* A split second later, a warning from my library *plus the previous warning* appears above the prompt.

This is cumulative: every time I hit 'run', one more warning is added to the list.  This is the behavior I would like to fix!

If I then hit the 'up' arrow in the console to re-execute the file, I get no warnings at all.  

If I run python from a command line instead of inside Spyder, I get a warning the first time, and not the second.  (The same thing happens if I type 'runfile' in the console by hand inside Spyder to start with.)  I'm actually trying to diagnose why that is, too, but the more-warnings-every-time thing is more obviously a problem.

The background is that the library is a C++ library with python bindings created with Swig.  It has a logging system that uses the 'SplitterChannel' class from the 'poco' library to pass warnings and other messages to the user.  This part of the library is somewhat of a mystery to me, but I can at least trace through the code.

Any insights appreciated!

-Lucian

[salman tariq]

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