code: def google2_log_prefix(level, timestamp=None, file_and_line=None):
      """Assemble a logline prefix using the google2 format."""
      # pylint: disable=global-variable-not-assigned
      global _level_names
      # pylint: enable=global-variable-not-assigned
  
      # Record current time
      now = timestamp or _time.time()
      now_tuple = _time.localtime(now)
      now_microsecond = int(1e6 * (now % 1.0))
  
      (filename, line) = file_and_line or _GetFileAndLine()
      basename = _os.path.basename(filename)
  
      # Severity string
      severity = "I"
      if level in _level_names:
          severity = _level_names[level][0]
  
      s = "%c%02d%02d %02d:%02d:%02d.%06d %5d %s:%d] " % (
          severity,
          now_tuple[1],  # month
          now_tuple[2],  # day
          now_tuple[3],  # hour
          now_tuple[4],  # min
          now_tuple[5],  # sec
          now_microsecond,
          _get_thread_id(),
          basename,
          line,
      )
  
      return s
  
imports: import logging
  import os
  import sys
  import _thread
  import time
  import traceback
  from logging import DEBUG
  from logging import ERROR
  from logging import FATAL
  from logging import INFO
  from logging import WARN
  import threading
  from tensorflow.python.util.tf_export import tf_export
label_desc: Use image node_id 19 for calling a global function with example usage: google2_log_prefix(level, timestamp, file_and_line) and returns: s