code: def get_single_fixer(fixname):
      '''return a single fixer found in the lib2to3 library'''
      fixer_dirname = fixer_dir.__path__[0]
      for name in sorted(os.listdir(fixer_dirname)):
          if (name.startswith("fix_") and name.endswith(".py") 
              and fixname == name[4:-3]):
              return "lib2to3.fixes." + name[:-3f get_single_fixer(fixname):
      '''return a single fixer found in the lib2to3 library'''
      fixer_dirname = fixer_dir.__path__[0]
      for name in sorted(os.listdir(fixer_dirname)):
          if (name.startswith("fix_") and name.endswith(".py") 
              and fixname == name[4:-3]):
              return "lib2to3.fixes." + name[:-3]
docs: return a single fixer found in the lib2to3 library