code: def broadcastable_to_str(b):
      """Return string representation of broadcastable."""
      named_broadcastable = {
          (): "scalar",
          (False,): "vector",
          (False, True): "col",
          (True, False): "row",
          (False, False): "matrix",
      }
      if b in named_broadcastable:
          bcast = named_broadcastable[b]
      else:
          bcast = ""
      return bcast
  
imports: import os
  from functools import reduce
  import numpy
  import pytensor
  from pytensor.compile import Function, builders
  from pytensor.graph.basic import Apply, Constant, Variable, graph_inputs
  from pytensor.graph.fg import FunctionGraph
  from pytensor.printing import pydot_imported, pydot_imported_msg
label_desc: Use image node_id 5 for calling a global function with example usage: broadcastable_to_str(b) and returns: bcast