docs: def get_variable_from_exception(exception, variable_name):
      """
      Grab the variable from closest frame in the stack
      """
      for frame in reversed(trace()):
          try:
              # From http://stackoverflow.com/a/9059407/6461688
              frame_variable = frame[0].f_locals[variable_name]
          except KeyError:
              pass
          else:
              return frame_variable
      else:
          raise KeyError("Variable '%s' not in any stack frames", variable_name)