code: def make_varname_generator():
      for i in range(65, 91):
          yield chr(i)
      raise Exception("Ran out of alphabet!")
  
file_path: autograd/examples/print_trace.py
imports: from __future__ import print_function
  import autograd.numpy
  from autograd.tracer import trace, Node
  from autograd import grad
label_desc: Use image node_id 1 for calling a global function with example usage: make_varname_generator() without return types