code: def is_pandas_dataframe(df):
      import pandas as pd
  
      if isinstance(df, pd.DataFrame):
          return True
      else:
          return False
  
imports: from packaging.version import Version, parse
  from types import ModuleType
  import numpy
  import torch
  import os
  import warnings
  import shutil
  from hummingbird.ml.exceptions import ConstantError
label_desc: Use image node_id 20 for calling a global function with example usage: is_pandas_dataframe(df) and returns: True, False