Never call a variable 'r' while debugging in python console.
I was trying to fix my code but for some reason the program didn't follow the code flow. I hate it when it happens because you can't pinpoint the source of the problem. I restarted the kernel, nothing, then I rebooted the IDE, nothing. The code behaved weirdly, the only thing I was doing was assigning a value to a temp variable called 'r' and then displaying it. The console kept telling me "--Return--", I didn't understand... Why, my old friend, are you telling me you're returning? Then I changed the variable name to old 'tmp' and it all worked. I finally realized that 'r' is a pdb command... I was angry at the console for obeying my own order... I'm sorry console