code: def get_tu(source, lang='c', all_warnings=False, flags=None):
      
      args = list(flags or [])
      name = 't.c'
      if lang == 'cpp':
          name = 't.cpp'
          args.append('-std=c++11')
      elif lang == 'objc':
          name = 't.m'
      elif lang != 'c':
          raise Exception('Unknown language: %s' % lang)
  
      if all_warnings:
          args += ['-Wall', '-Wextra']
  
      return TranslationUnit.from_source(name, args, unsaved_files=[(name,
                                                                     source)])
docs: Obtain a translation unit from source and language.
  
      By default, the translation unit is created from source file "t.<ext>"
      where <ext> is the default file extension for the specified language. By
      default it is C, so "t.c" is the default file name.
  
      Supported languages are {c, cpp, objc}.
  
      all_warnings is a convenience argument to enable all compiler warnings.