code: def setup(self, usecols):
      num_lines = 5000
      data = ["0, 1, 2, 3, 4, 5, 6, 7, 8, 9"] * 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 LoadtxtUseColsCSV obj's underlying member method code with example usage: obj.setup(usecols) without return types