docstr: Returns
  -------
  Iterator
      Iterate over all active cells in the window, yielding (i,j) tuple.
      Expected to start with index (1,1) and end with index (n+1, m+1).
docstr_tok: ["Returns","--","--","--","-","Iterator","Iterate","over","all","active","cells","in","the","window",",","yielding","(","i",",","j",")","tuple",".","Expected","to","start","with","index","(","1,1",")","and","end","with","index","(","n+1",",","m+1",")","."]
code: def __iter__(self):
      """
      Returns
      -------
      Iterator
          Iterate over all active cells in the window, yielding (i,j) tuple.
          Expected to start with index (1,1) and end with index (n+1, m+1).
      """
      pass
  
imports: import array
  from abc import ABC, abstractmethod
  from math import atan, tan
  from typing import Tuple
  import numpy
  from darts.logging import raise_if, raise_if_not
label_desc: Use image node_id 7 for calling the Window obj's underlying member method code with example usage: obj.__iter__() without return types