[
  {"type":"Name","value":"message"},
  {"type":"Operator","value":"."},
  {"type":"Name","value":"append"},
  {"type":"Punctuation","value":"("},
  {"type":"LiteralStringAffix","value":"f"},
  {"type":"LiteralStringSingle","value":"' [line "},
  {"type":"LiteralStringInterpol","value":"{"},
  {"type":"Name","value":"lineno"},
  {"type":"LiteralStringInterpol","value":":"},
  {"type":"LiteralStringSingle","value":"2d"},
  {"type":"LiteralStringInterpol","value":"}"},
  {"type":"LiteralStringSingle","value":"]'"},
  {"type":"Punctuation","value":")"},
  {"type":"Text","value":"\n"}
]