##
3.12.1 Traceback Example

This simple example implements a basic read-eval-print loop, similar to (but less useful than) the standard Python interactive interpreter loop. For a more complete implementation of the interpreter loop, refer to the `code` module.

      import sys, traceback

      def run_user_code(envdir):
          source = raw_input(">>> ")
          try:
              exec source in envdir
          except:
              print "Exception in user code:"
              print '-'*60
              traceback.print_exc(file=sys.stdout)
              print '-'*60

      envdir = {}
      while 1:
          run_user_code(envdir)