code: def string_to_char_array(seq):
      """
      Converts an ASCII string to a NumPy array of byte-long ASCII codes.
      e.g. "ACGT" becomes [65, 67, 71, 84].
      """
      return np.frombuffer(bytearray(seq, "utf8"), dtype=np.int8)
  
imports: from __future__ import division, print_function
  import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: string_to_char_array(seq) and returns: np