code: def linestrings(polygons):
      return polygons.boundary
  
file_path: geopandas/geopandas/tools/tests/test_random.py
imports: import pytest
  import numpy
  import geopandas
  from geopandas.tools._random import uniform
label_desc: Use image node_id 4 for calling a global function with example usage: linestrings(polygons) and returns: polygons