code: def _fill_labels(clean_data):
      labely_columns = [
          "arr_delay",
          "dep_delay",
          "carrier_delay",
          "weather_delay",
          "national_airspace_delay",
          "security_delay",
          "late_aircraft_delay",
          "canceled",
          "diverted",
          "taxi_in",
          "taxi_out",
          "air_time",
      ]
      for col in labely_columns:
          clean_data.loc[:, col] = clean_data[col].fillna(0)
  
      return clean_data
  
file_path: featuretools/featuretools/demo/flight.py
imports: import math
  import re
  import pandas
  from tqdm import tqdm
  from woodwork.logical_types import Boolean, Categorical, Ordinal
  import featuretools
label_desc: Use image node_id 4 for calling a global function with example usage: _fill_labels(clean_data) and returns: clean_data