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","."]
code: def write(self, values: base.LoggingData):
      values = {k: v for k, v in values.items() if v is not None}
      self._to.write(values)
  
imports: import math
  import time
  from typing import Callable, Optional, Sequence
  from acme.utils.loggers import base
label_desc: Use image node_id 2 for calling the NoneFilter obj's underlying member method code with example usage: obj.write(values) without return types