code: def setup(self, dtype, num_lines):
      data = ["5, 7, 888"] * num_lines
      self.csv_data = StringIO("\n".join(data))
  
imports: from .common import Benchmark, get_squares, get_squares_
  import numpy
  from io import SEEK_SET, StringIO, BytesIO
label_desc: Use image node_id 1 for calling the LoadtxtCSVdtypes obj's underlying member method code with example usage: obj.setup(dtype, num_lines) without return types