text: import csv
  
  def read_csv(file, header=False):
      """return a parsed csv file in built-in dataframe"""
      data = []
      with open(file, 'r') as f:
          reader = csv.reader(f)
          for row in reader:
              if header:
                  continue
              line = [v_parse(val) for val in row]
              data.append(line)
  
      return data
  