code: def df():
      return DataFrame({"A": [1, 2, 3]})
  
imports: import array
  from functools import partial
  import subprocess
  import sys
  import numpy
  import pytest
  from pandas.errors import IntCastingNaNError
  import pandas
  from pandas import DataFrame, DatetimeIndex, Series, TimedeltaIndex
  import pandas._testing
  from pandas.core.arrays import DatetimeArray, TimedeltaArray
label_desc: Use image node_id 1 for calling a global function with example usage: df() and returns: DataFrame