Code will always evaluate `False` because the `os.path.isfile` function is not called: ```python if not os.path.isfile: sptfile = "notfound" ``` https://github.com/spacetelescope/calcos/blob/master/calcos/timeline.py#L229
Code will always evaluate
Falsebecause theos.path.isfilefunction is not called:https://github.com/spacetelescope/calcos/blob/master/calcos/timeline.py#L229