code: def daily_df():
      df = DataLoader().load_peyton_manning()
      df[TIME_COL] = pd.to_datetime(df[TIME_COL])
      return df
  
imports: import numpy
  import pandas
  import pytest
  from holidays_ext.get_holidays import get_holiday_df
  from testfixtures import LogCapture
  from greykite.algo.common.holiday_inferrer import HolidayInferrer
  from greykite.common.constants import EVENT_DF_DATE_COL
  from greykite.common.constants import EVENT_DF_LABEL_COL
  from greykite.common.constants import TIME_COL
  from greykite.common.constants import VALUE_COL
  from greykite.common.data_loader import DataLoader
  from greykite.common.logging import LOGGER_NAME
label_desc: Use image node_id 1 for calling a global function with example usage: daily_df() and returns: df