Error running Scheduler_intro notebook about rubin_sim_notebooks HOT 1 OPEN

class MySurvey(BaseSurvey):
   def generate_observations_rough(self, conditions):
       obs = empty_observation()
       obs['RA'] = np.radians(273.0)
       obs['dec'] = np.radians(-78.0)
       obs['exptime'] = 30.  # Seconds
       obs['nexp'] = 2
       obs['filter'] = 'r'
       # If it's been 12 hours or more, don't try to execute the observation anymore
       obs['flush_by_mjd'] = conditions.mjd + 1
       obs['note'] = 'mysurvey'  # Always good to set the note to which survey generated the observation
       # Make it a list of n
       result = [obs] * 7
       return result

# load up a model observatory.
nside=32  # Specify the HEALpix resolution we want to do everything in.
mjd_start = 60218
mo = ModelObservatory(nside=nside, mjd_start=mjd_start)
conditions = mo.return_conditions()

my_survey = MySurvey([])
print("what's the current time?", conditions.mjd)
print("Is the current survey feasible and has a reward? (i.e. it's not -Infinity)", my_survey.calc_reward_function(conditions))
print("Ok, try the observations")
obs = my_survey.generate_observations(conditions)
print("did the conditions change? (they should not have here yet)", conditions.mjd)
pd.DataFrame(np.hstack(obs))[['RA', 'dec', 'mjd', 'exptime', 'filter', 'alt', 'az', 'airmass', 'night', 'slewtime', 'sunAlt']]

# Now to build our scheduler object, and run it for a day

scheduler = CoreScheduler([my_survey], nside=nside)
# sim_runner will return the updated model observatory, the updated scheduler, and an array of
# completed observations
print('starting time', mo.mjd)
mo, scheduler, observations = sim_runner(mo, scheduler,survey_length=0.3,
                                                verbose=True)
print('ending time', mo.mjd)
# Show what observations were acquired
pd.DataFrame(np.hstack(observations))[['RA', 'dec', 'mjd', 'exptime', 'filter', 'alt', 'az', 'airmass', 'night', 'slewtime', 'sunAlt']]