code: def lines_json_df():
      df = DataFrame({"A": [1, 2, 3], "B": [4, 5, 6]})
      return df.to_json(lines=True, orient="records")
  
imports: from collections.abc import Iterator
  from io import StringIO
  from pathlib import Path
  import numpy
  import pytest
  import pandas
  from pandas import DataFrame, read_json
  import pandas._testing
  from pandas.io.json._json import JsonReader
label_desc: Use image node_id 1 for calling a global function with example usage: lines_json_df() and returns: df