class_docstr: Wrapper for a stateless input transformer implemented as a function.
class_docstr_tok: ["Wrapper","for","a","stateless","input","transformer","implemented","as","a","function","."]
docstr: Send a line of input to the transformer, returning the
  transformed input.
code: def push(self, line):
      """Send a line of input to the transformer, returning the
      transformed input."""
      return self.func(line)
  
imports: import abc
  import functools
  import re
  import tokenize
  from tokenize import untokenize, TokenError
  from io import StringIO
  from IPython.core.splitinput import LineInfo
  from IPython.utils import tokenutil
label_desc: Use image node_id 3 for calling the StatelessInputTransformer obj's underlying member method code with example usage: obj.push(line) and returns: self