code: def test_F95_gfortran():
      if ("F95", "gfortran") in invalid_lang_compilers:
          skip("`gfortran' command didn't work as expected")
  
imports: from sympy.abc import x, y, z
  from sympy.external import import_module
  from sympy.testing.pytest import skip
  from sympy.utilities.codegen import codegen, make_routine, get_code_generator
  import sys
  import os
  import tempfile
  import subprocess
label_desc: Use image node_id 8 for calling a global function with example usage: test_F95_gfortran() without return types