code: def shapefile(self, data_dir):
      self.c = fiona.open(data_dir, "r", layer="coutwildrnp")
      yield
      self.c.close()
  
file_path: Fiona/tests/test_layer.py
imports: import pytest
  import fiona
  from .test_collection import TestReading
label_desc: Use image node_id 1 for calling the TestDirReading obj's underlying member method code with example usage: obj.shapefile(data_dir) without return types