code: def version_match(self, version_string):
      v = self.gnu_version_match(version_string)
      if not v or v[0] != "g77":
          return None
      return v[1]
  
imports: import re
  import os
  import sys
  import warnings
  import platform
  import tempfile
  import hashlib
  import base64
  import subprocess
  from subprocess import Popen, PIPE, STDOUT
  from numpy.distutils.exec_command import filepath_from_subprocess_output
  from numpy.distutils.fcompiler import FCompiler
  from distutils.version import LooseVersion
label_desc: Use image node_id 2 for calling the GnuFCompiler obj's underlying member method code with example usage: obj.version_match(version_string) and returns: v, None