code: def doctest_runvars():
      """Test that variables defined in scripts get loaded correctly via %run.
  
      In [13]: run simplevars.py
      x is: 1
  
      In [14]: x
      Out[14]: 1
      """
  
imports: import inspect
label_desc: Use image node_id 3 for calling a global function with example usage: doctest_runvars() without return types