code: def cities(naturalearth_cities):
      return read_file(naturalearth_cities)
  
imports: import math
  from typing import Sequence
  import numpy
  import pandas
  import shapely
  from shapely.geometry import Point, Polygon, GeometryCollection
  import geopandas
  import geopandas._compat
  from geopandas import GeoDataFrame, GeoSeries, read_file, sjoin, sjoin_nearest
  from geopandas.testing import assert_geodataframe_equal, assert_geoseries_equal
  from pandas.testing import assert_frame_equal, assert_series_equal
  import pytest
label_desc: Use image node_id 3 for calling a global function with example usage: cities(naturalearth_cities) and returns: read_file