python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Doc/includes/email-unpack.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+
+"""Unpack a MIME message into a directory of files."""
+
+import os
+import email
+import mimetypes
+
+from email.policy import default
+
+from argparse import ArgumentParser
+
+
+def main():
+    parser = ArgumentParser(description="""\
+Unpack a MIME message into a directory of files.
+""")
+    parser.add_argument('-d', '--directory', required=True,
+                        help="""Unpack the MIME message into the named
+                        directory, which will be created if it doesn't already
+                        exist.""")
+    parser.add_argument('msgfile')
+    args = parser.parse_args()
+
+    with open(args.msgfile, 'rb') as fp:
+        msg = email.message_from_binary_file(fp, policy=default)
+
+    try:
+        os.mkdir(args.directory)
+    except FileExistsError:
+        pass
+
+    counter = 1
+    for part in msg.walk():
+        # multipart/* are just containers
+        if part.get_content_maintype() == 'multipart':
+            continue
+        # Applications should really sanitize the given filename so that an
+        # email message can't be used to overwrite important files
+        filename = part.get_filename()
+        if not filename:
+            ext = mimetypes.guess_extension(part.get_content_type())
+            if not ext:
+                # Use a generic bag-of-bits extension
+                ext = '.bin'
+            filename = 'part-%03d%s' % (counter, ext)
+        counter += 1
+        with open(os.path.join(args.directory, filename), 'wb') as fp:
+            fp.write(part.get_payload(decode=True))
+
+
+if __name__ == '__main__':
+    main()