code: def get_flags_opt(self):
      v = self.get_version()
      if v and v <= "3.3.3":
          # With this compiler version building Fortran BLAS/LAPACK
          # with -O3 caused failures in lib.lapack heevr,syevr tests.
          opt = ["-O2"]
      else:
          opt = ["-O3"]
      opt.append("-funroll-loops")
      return opt
  
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 9 for calling the GnuFCompiler obj's underlying member method code with example usage: obj.get_flags_opt() and returns: opt