code: def setUp(self):
      self.table.drop()
      self.dataframe = pandas.DataFrame(
          {
              "id": range(1001),
              "first_name": [str(i) for i in range(1001)],
              "last_name": [str(i) for i in range(1001)],
              "nullable": [
                  i if i % 2 == 0 else None for i in range(1001)
              ],
              "zero": [0] * 1001,
              "pi": [math.pi] * 1001,
          }
      )
  
      lore.io.main.metadata.create_all()
  
imports: from __future__ import unicode_literals
  import unittest
  from threading import Thread
  import datetime
  import time
  import math
  import lore.io.connection
  import sqlalchemy
  from sqlalchemy import event
  from sqlalchemy.engine import Engine
  import pandas
  import lore
label_desc: Use image node_id 2 for calling the TestConnection obj's underlying member method code with example usage: obj.setUp() without return types