code: def _operation_to_filter_shape(operation):
      splitted_operation = operation.split("x")
      filter_shape = int(splitted_operation[0][-1])
      assert filter_shape == int(
          splitted_operation[1][0]
      ), "Rectangular filters not supported."
      return filter_shape
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import tensorflow
label_desc: Use image node_id 7 for calling a global function with example usage: _operation_to_filter_shape(operation) and returns: filter_shape