code: def split_wet_file(
      wet_file_path, counter_inc_fn=None, line_delimiter="\n"
  ):
      """Split a WET file into separate pages."""
      logging.info("Splitting file: %s", wet_file_path)
      if not counter_inc_fn:
          counter_inc_fn = get_counter_inc_fn("split-wet-file")
      counter_inc_fn("wet-file")
  
      def _validate_features(page):
          """Return True if page features are valid."""
          if not page.url:
              counter_inc_fn("filtered:no_url")
          elif not page.text:
              counter_inc_fn("filtered:no_content")
          elif not page.timestamp:
              counter_inc_fn("filtered:no_timestamp")
          else:
              counter_inc_fn("passed")
              return True
          return False
  
      with tf.io.gfile.GFile(wet_file_path, "rb") as f, gzip.GzipFile(
          fileobj=f
      ) as g:
          page = PageFeatures()
          for i, line in enumerate(
              io.TextIOWrapper(g, encoding="utf-8")
          ):  # pytype: disable=wrong-arg-types
              line = line.strip()
              if not line:
                  continue
              if line == _PAGE_DELIMITER:
                  if i > 0 and _validate_features(page):
                      yield page
                  page = PageFeatures()
  
              if line.startswith(_URL_KEY):
                  page.url = line[len(_URL_KEY) :].strip()
                  page.normalized_url = normalize_url(
                      line[len(_URL_KEY) :].strip()
                  )
  
              if line.startswith(_URL_DATE):
                  page.timestamp = line[len(_URL_DATE) :].strip()
  
              if line.startswith(_CONTENT_TYPE):
                  page.content_type = line[len(_CONTENT_TYPE) :].strip()
  
              if line.startswith(_CONTENT_LEN):
                  page.content_length = line[
                      len(_CONTENT_LEN) :
                  ].strip()
  
              if line.startswith(_METADATA_PREFIXES):
                  continue
  
              if page.text:
                  page.text += line_delimiter
              page.text += line
  
          if _validate_features(page):
              yield page
  
imports: import dataclasses
  import functools
  import gzip
  import hashlib
  import heapq
  import io
  import re
  import threading
  from typing import Collection, Iterable, Mapping, Optional, Sequence, Tuple
  from absl import logging
  from tensorflow_datasets.core.utils.lazy_imports_utils import tensorflow
  import tensorflow_datasets.public_api
label_desc: Use image node_id 13 for calling a global function with example usage: split_wet_file(wet_file_path, counter_inc_fn, line_delimiter) and returns: False, True