pass iter_archive

openwebtext.py

@@ -14,9 +14,7 @@
 # limitations under the License.
 """The Open WebText Corpus"""
 
-import os
 import re
-import tarfile
 
 import datasets
 
@@ -38,23 +36,6 @@ _N_DATA_FILES = 21
 _DATA_FILES = ["subsets/urlsf_subset{:02d}.tar".format(i) for i in range(_N_DATA_FILES)]
 
 
-def _iter_tar(f):
-    stream = tarfile.open(fileobj=f, mode="r|*")
-    for tarinfo in stream:
-        file_path = tarinfo.name
-        if not tarinfo.isreg():
-            continue
-        if file_path is None:
-            continue
-        if os.path.basename(file_path).startswith((".", "__")):
-            # skipping hidden files
-            continue
-        file_obj = stream.extractfile(tarinfo)
-        yield file_path, file_obj
-        stream.members = []
-    del stream
-
-
 class Openwebtext(datasets.GeneratorBasedBuilder):
     """The Open WebText dataset."""
 
@@ -80,17 +61,18 @@ class Openwebtext(datasets.GeneratorBasedBuilder):
             datasets.SplitGenerator(name=datasets.Split.TRAIN, gen_kwargs={
                 "archive_iterators": [
                     dl_manager.iter_archive(archive) for archive in archives
-                ]
+                ],
+                "iter_archive": dl_manager.iter_archive
             }),
         ]
 
-    def _generate_examples(self, archive_iterators):
+    def _generate_examples(self, archive_iterators, iter_archive):
         """Yields examples."""
         for archive_iterator in archive_iterators:
             for xz_filepath, xz_f in archive_iterator:
                 if not xz_filepath.endswith(".xz"):
                     continue
-                for txt_filepath, txt_f in _iter_tar(xz_f):
+                for txt_filepath, txt_f in iter_archive(xz_f):
                     if not txt_filepath.endswith(".txt"):
                         continue
                     idx = f"{xz_filepath}/{txt_filepath}"