poor error message when wrong file type

[louking]

Invalid exception seen

        Message type:       ERROR
        Location:           /var/www/www.routes.loutilities.com/venv/lib64/python3.6/site-packages/loutilities/tables.py:1239
        Module:             tables
        Function:           wrapped_f
        Time:               2021-02-22 13:23:48,507

        Message:

        Unexpected Error: exceptions must derive from BaseException
Traceback (most recent call last):
  File "/var/www/www.routes.loutilities.com/venv/lib64/python3.6/site-packages/loutilities/tables.py", line 1233, in wrapped_f
    f(self,*args, **kwargs)
  File "/var/www/www.routes.loutilities.com/venv/lib64/python3.6/site-packages/loutilities/tables.py", line 2511, in post
    self._responsedata = self.upload()
  File "/var/www/www.routes.loutilities.com/runningroutes/runningroutes/runningroutes/views/admin/routes.py", line 281, in upload
    latlng = LatLng(thisfile, filetype)
  File "/var/www/www.routes.loutilities.com/venv/lib64/python3.6/site-packages/loutilities/geo.py", line 21, in __init__
    raise 'invalid type: ' + filetype
TypeError: exceptions must derive from BaseException