code: def arr_dtype_number(arr, num):
      """Return dtype for given number of items per element"""
      return np.dtype(arr.dtype.str[:2] + str(num))
  
imports: import numpy
  from scipy._lib import doccer
  from .None import _byteordercodes
label_desc: Use image node_id 6 for calling a global function with example usage: arr_dtype_number(arr, num) and returns: np