code: def wait_for_predicate(
      wait_predicate_fn: Callable[[], bool],
      sleep_time_secs: int = _WAIT_DEFAULT_SLEEP_TIME_SECS,
      num_retries: int = _WAIT_DEFAULT_NUM_RETRIES,
  ) -> None:
      """Blocks while `wait_predicate_fn` is returning `True`.
  
      The callable `wait_predicate_fn` indicates if waiting is still needed by
      returning `True`. Once the condition that we wanted to wait for met, the
      callable should return `False` denoting that the execution can continue.
  
      The default setting allows a fairly loose, but not infinite wait time of one
      days for this function to block checking the `wait_predicate_fn` in every
      seconds.
  
      Args:
        wait_predicate_fn: A callable returning a bool. Blocks while it is returning
          `True`. Returns if it becomes `False`.
        sleep_time_secs: Number of time in seconds slept between retries.
        num_retries: Number of times the existence of the file is checked.
  
      Raises:
        TimeoutError: If the `wait_predicate_fn` does not become `False` during the
          number of trials.
      """
      retry = 0
      while (
          num_retries is None or retry < num_retries
      ) and wait_predicate_fn():
          if sleep_time_secs > 0:
              logging.info(
                  "Waiting for `wait_predicate_fn`. Block execution. Sleeping for %d "
                  "seconds.",
                  sleep_time_secs,
              )
              time.sleep(sleep_time_secs)
          retry += 1
  
      if retry >= num_retries:
          raise TimeoutError(
              "The wait predicate did not return `False` after {} retries waiting {} "
              "seconds between retries.".format(
                  num_retries, sleep_time_secs
              )
          )
  
      logging.info(
          "The `wait_predicate_fn` returned `False`. Continue execution."
      )
  
file_path: agents/tf_agents/train/utils/train_utils.py
imports: import os
  import time
  from typing import Callable, Text, Tuple
  from absl import logging
  import tensorflow.compat.v2
  from tf_agents.agents import tf_agent
  from tf_agents.policies import py_tf_eager_policy
  from tf_agents.typing import types
  from tf_agents.utils import lazy_loader
label_desc: Use image node_id 5 for calling a global function with example usage: wait_for_predicate(wait_predicate_fn, sleep_time_secs, num_retries) without return types