code: def time_loadtxt_csv_datetime(self, num_lines):
      # rewind StringIO object -- the timing iterations
      # are state-dependent
      X = np.loadtxt(
          self.csv_data,
          delimiter=",",
          dtype=([("dates", "M8[us]"), ("values", "float64")]),
      )
      self.csv_data.seek(0)
  
imports: from .common import Benchmark, get_squares, get_squares_
  import numpy
  from io import SEEK_SET, StringIO, BytesIO
label_desc: Use image node_id 2 for calling the LoadtxtCSVDateTime obj's underlying member method code with example usage: obj.time_loadtxt_csv_datetime(num_lines) without return types