code: def step_impl_input_files_exists(context, dformat):
      """Check that input data exists on disk."""
      data_path = os.path.join("test_data", dformat)
      data_available = os.path.exists(data_path)
      if not data_available:
          context.scenario.skip(
              reason="No test data available for " + dformat
          )
      else:
          context.dformat = dformat
          context.data_path = data_path
  
file_path: satpy/satpy/tests/features/steps/steps-real-load-process-write.py
imports: import fnmatch
  import os
  from tempfile import NamedTemporaryFile
  import numpy
  from behave import given, then, when
  from PIL import Image
label_desc: Use image node_id 5 for calling a global function with example usage: step_impl_input_files_exists(context, dformat) without return types