code: def get_smoothed_value(name: str, key: str) -> float:
      """Get a single smoothed value.
  
      Raises:
          KeyError: if no metrics have been logged under *name* and *key*.
      """
      return _aggregators[name].get_smoothed_value(key)
  
imports: import contextlib
  import uuid
  from collections import defaultdict
  from typing import Callable, List, Optional
  from .meters import *
label_desc: Use image node_id 16 for calling a global function with example usage: get_smoothed_value(name, key) and returns: _aggregators