class_docstr: Logger which writes to another logger, filtering any `None` values.
class_docstr_tok: ["Logger","which","writes","to","another","logger",",","filtering","any","`","None","`","values","."]
docstr: Initializes the logger.
  
  Args:
    to: A `Logger` object to which the current object will forward its results
      when `write` is called.
docstr_tok: ["Initializes","the","logger",".","Args",":","to",":","A","`","Logger","`","object","to","which","the","current","object","will","forward","its","results","when","`","write","`","is","called","."]
code: def __init__(self, to: base.Logger):
      """Initializes the logger.
  
      Args:
        to: A `Logger` object to which the current object will forward its results
          when `write` is called.
      """
      self._to = to
  
imports: import math
  import time
  from typing import Callable, Optional, Sequence
  from acme.utils.loggers import base
label_desc: Use image node_id 1 to create a new NoneFilter object from inherited base classes: base with example: obj = NoneFilter(to)