Simple G-Code Generator

I had to use "2to3" to try and convert them to Python3 and was able to get the GUI's to work on Bezel and a few others and then I filled out the the dimensions and hit "Write to Axis" but it always errored with "No percent sign or M2" and discarded the gcode file. I couldn't get them to write to the clipboard either. I couldn't get "Engrave" or "Bolt pattern" to run without "indentions or tab" errors.

Yes, you are correct. The way the python script creates the gcode in this particular script is by using trigonometry to find the coordinates and writing to sys.stdout. I did find a preamble and postamble in the py file and I found the postamble was correct with an M2 so I think it has something to do with the way it sends the code to Axis.

It is an assumption. I click on "Write to Axis" and I notice that Axis says "filtering" at the bottom right but nothing is received. I then exit the py script gui after a few minutes of waiting for it to post code and that's when axis gives the message about the % sign or M2. It could be it never got anything.
I may change the "sys.stdout.write" to create a file instead and see if it post.
There may be something else in the py script that hangs it up. These scripts all ran fine on the python version that comes with Wheezy on my other machine but they don't like Python 3 and using 2to3 doesn't fix everything.

I may also try to run the script in terminal and see what I can find out.