code: def find_block(block, name):
      for ch in block.get_children():
          if ch.get_name() == name:
              return ch
  
imports: import symtable
  import unittest
  from test import support
  from test.support import os_helper
label_desc: Use image node_id 1 for calling a global function with example usage: find_block(block, name) and returns: ch