code: def setup(self):
      N = 10**6
      self.dti = date_range("1900-01-01", periods=N, freq="min")
      self.period = self.dti.to_period("D")
  
imports: from functools import wraps
  import threading
  import numpy
  from pandas import DataFrame, Index, Series, date_range, factorize, read_csv
  from pandas.core.algorithms import take_nd
  from .pandas_vb_common import BaseIO
  from .pandas_vb_common import setup
label_desc: Use image node_id 1 for calling the ParallelDatetimeFields obj's underlying member method code with example usage: obj.setup() without return types