code: def a(text, mode='exec', indent='  ', file=None):
      
      pprint_ast(parse(text, mode=mode), indent=indent, file=file)
docs: Interactive convenience for displaying the AST of a code string.
  
      Writes a pretty-formatted AST-tree to `file`.
  
      Parameters
      ----------
      text : str
          Text of Python code to render as AST.
      mode : {'exec', 'eval'}, optional
          Mode for `ast.parse`.  Default is 'exec'.
      indent : str, optional
          String to use for indenting nested expressions.  Default is two spaces.
      file : None or file-like object, optional
          File to use to print output.  If the default of `None` is passed, we
          use sys.stdout.