Update data URL for enron_emails subset (#3)

- Update data URL for enron_emails subset (ced5e97abb3ee6c858f9eaf51f24d95c9f54da8c)

the_pile.py

@@ -57,7 +57,7 @@ _DATA_URLS = {
         "validation": [f"{_HOST_URL}/public/AI/pile/val.jsonl.zst"],
         "test": [f"{_HOST_URL}/public/AI/pile/test.jsonl.zst"],
     },
-    "enron_emails": "http://eaidata.bmk.sh/data/enron_emails.jsonl.zst",
+    "enron_emails": "https://www.cs.cmu.edu/~enron/enron_mail_20150507.tar.gz",
     "europarl": f"{_HOST_URL}/public/AI/pile_preliminary_components/EuroParliamentProceedings_1996_2011.jsonl.zst",
     "free_law": f"{_HOST_URL}/public/AI/pile_preliminary_components/FreeLaw_Opinions.jsonl.zst",
     "hacker_news": f"{_HOST_URL}/public/AI/pile_preliminary_components/hn.tar.gz",
@@ -222,7 +222,7 @@ class ThePile(datasets.GeneratorBasedBuilder):
                         key += 1
         else:
             for subset in files:
-                if subset in {"enron_emails", "europarl", "free_law", "nih_exporter", "pubmed", "ubuntu_irc"}:
+                if subset in {"europarl", "free_law", "nih_exporter", "pubmed", "ubuntu_irc"}:
                     import zstandard as zstd
 
                     with zstd.open(open(files[subset], "rb"), "rt", encoding="utf-8") as f:
@@ -230,10 +230,13 @@ class ThePile(datasets.GeneratorBasedBuilder):
                             data = json.loads(row)
                             yield key, data
                             key += 1
-                elif subset in {"hacker_news", "pubmed_central"}:
+                elif subset in {"enron_emails", "hacker_news", "pubmed_central"}:
                     for path, file in files[subset]:
-                        id_ = path.split("/")[-1].split(".")[0]
-                        meta = {"id": id_}
+                        if subset == "enron_emails":
+                            meta = {"file": path}
+                        else:
+                            id_ = path.split("/")[-1].split(".")[0]
+                            meta = {"id": id_}
                         text = file.read().decode("utf-8")
                         yield key, {
                             "text": text,