code: def read_sample(filename):
      
      
      file = open(filename, 'r')
  
      sample = [[float(val) for val in line.split()] for line in file if len(line.strip()) > 0]
      
      file.close()
      return sample
docs: !
      @brief Returns data sample from simple text file.
      @details This function should be used for text file with following format:
      @code
      point_1_coord_1 point_1_coord_2 ... point_1_coord_n
      point_2_coord_1 point_2_coord_2 ... point_2_coord_n
      ... ...
      @endcode
      
      @param[in] filename (string): Path to file with data.
      
      @return (list) Points where each point represented by list of coordinates.