code: def get_global_option(key, default_value):
      if key in _GlobalOptions:
          return _GlobalOptions[key]
      else:
          # return the default value user passed in
          return default_value
  
file_path: CNTK/bindings/python/cntk/default_options.py
label_desc: Use image node_id 6 for calling a global function with example usage: get_global_option(key, default_value) and returns: _GlobalOptions, default_value