#6 NameError: global name 'os' is not defined

[Denilson Sá]

I've tested rurple1.0rc3, running on amd64 Gentoo/Linux, with Python 2.5.2 and wxPython 2.8.9.1.

When clicking at "Load robot images" button, or even when trying to close the window after changing something, I get:
NameError: global name 'os' is not defined

After some digging, I found the cause of this problem. Somehow (probably a bug in wxpython), the following line removes 'os' from global scope:
win = py.shell.Shell(self.window, -1, introText = "")
I've added "print os.getcwd()" before and after that line, and I receive NameError exception at the print right after that line.

I've also looked at globals() dictionary before and after that line, and the only changes are the removal of 'os' module and the addition of 'shell' module.

Unfortunately, the solution is not simple. Just adding "import os" line after the py.shell.Shell won't work. Upon doing that, I got the following message at the terminal, when I clicked on"Load robot images" button:

/tmp/software/rurple1.0rc3/rur_start.py(495)load_images()
-> pdb.post_mortem(sys.exc_info()[2])

What's more, if I use ipython (version 0.9.1) instead of python, by running "ipython rur_start.py", then I don't get that NameError exception anymore, and the global namespace is not changed after execution of that py.shell.Shell line (I've compared the globals() output before and after that line). This is weird, as ipython is just an interactive shell and shouldn't have changed the behavior of the program.

There is a workaround. If I type "import os" inside the python shell (at the third tab), then everything works.

I suppose it might be a bug within wxpython. Maybe people from wxpython community might understand what's going on here.

[Ricardo Cárdenes]

Hey. "import os" after the offending line won't work because the symbol (os) is imported as local to the method. A quick workaround would be to add "global os" at the beginning of the RURApp.init, and then "import os" after "win = py.shell ...".

That way, the reimported module will be assigned a global label.