code: def build_extensions(self):
      c = self.compiler.compiler_type
      if c in copt:
          for e in self.extensions:
              e.extra_compile_args = copt[c]
      build_ext.build_extensions(self)
  
imports: from __future__ import division
  import os
  from distutils.command.build_ext import build_ext
label_desc: Use image node_id 1 for calling the build_ext_subclass obj's underlying member method code with example usage: obj.build_extensions() without return types