PROCESS_SCHEDULE failed on "Cannot set a frame with no defined index "

[fyliu]

I saw this several days ago. Looks like it's expecting a value that's not there. The data retrieval may be incomplete but there's no way to tell. We may need some kind of validation for incoming data.

 root@a394df3c48f8:/app# bash tasks/DAILY_AT_2AM.sh
2019-11-29T03:13:20.002946+00:00,GET_SCHEDULE completed successfully
2019-11-29T03:13:32.189679+00:00,Cannot set a frame with no defined index and a value that cannot be converted to a Series
  File "src/main.py", line 14, in main
    outcome = ACTIONS[command](ctx, datetime)
  File "/app/src/actions.py", line 14, in <lambda>
    'PROCESS_SCHEDULE': lambda ctx, dt: process_schedule(ctx, dt),
  File "/app/src/library/process_schedule.py", line 25, in process_schedule
    line_schedule = scheduleTimeToDateTime(line_schedule, start_date)
  File "/app/src/library/analyzer/schedule.py", line 18, in scheduleTimeToDateTime
    lambda row: makeDateTime(date, row["arrival_time"]).to_iso8601_string(), axis=1
  File "/usr/local/lib/python3.6/site-packages/pandas/core/frame.py", line 3487, in __setitem__
    self._set_item(key, value)
  File "/usr/local/lib/python3.6/site-packages/pandas/core/frame.py", line 3563, in _set_item
    self._ensure_valid_index(value)
  File "/usr/local/lib/python3.6/site-packages/pandas/core/frame.py", line 3543, in _ensure_valid_index
    "Cannot set a frame with no defined index "
2019-11-29T03:13:32.189679+00:00,PROCESS_SCHEDULE failed