docstr: Return an integer timestamp based on a date/datetime object.
docstr_tok: ["Return","an","integer","timestamp","based","on","a","date\/datetime","object","."]
code: def to_timestamp(obj):
      """Return an integer timestamp based on a date/datetime object."""
      classname = obj.__class__.__name__
      if classname == "date":
          return datetime(obj.year, obj.month, obj.day).timestamp()
      elif classname == "datetime":
          return obj.timestamp()
      else:
          return -1
  
imports: from datetime import datetime
  import numpy
  import pandas
  import pyarrow
  from pytest import fixture
  from random import random, randint, choice
  from faker import Faker
label_desc: Use image node_id 4 for calling the Util obj's underlying member method code with example usage: obj.to_timestamp(obj) and returns: datetime, obj, unknown