Get rid of .pyc (and possibly .pyo) files

dotfiles/bash/global-before.bashrc

@@ -38,3 +38,6 @@ export GVFS_DISABLE_FUSE=1
 
 # disable the terrible beep sound (only for X; for tty?, blacklist pcspkr)
 [[ ${!DISPLAY[@]} ]] &&  xset b off
+
+# get rid of those .pyc files once and for all
+export PYTHONDONTWRITEBYTECODE=1