code: def setup(self, nobs):
      d = "2018-11-29"
      dt = "2018-11-26 11:18:27.0"
      self.data = pd.DataFrame(
          {
              "dt": [np.datetime64(dt)] * nobs,
              "d": [np.datetime64(d)] * nobs,
              "r": [np.random.uniform()] * nobs,
          }
      )
  
imports: import numpy
  import pandas
  from pandas import offsets
label_desc: Use image node_id 1 for calling the DatetimeStrftime obj's underlying member method code with example usage: obj.setup(nobs) without return types