issue22046: mention that zipfile can raise NotImplementedError on unsupported
compression algorithms.
diff --git a/Doc/library/zipfile.rst b/Doc/library/zipfile.rst
index f3e54ca..ecb370b 100644
--- a/Doc/library/zipfile.rst
+++ b/Doc/library/zipfile.rst
@@ -298,7 +298,11 @@
file in the archive, or a :class:`ZipInfo` object. The archive must be open for
read or append. *pwd* is the password used for encrypted files and, if specified,
it will override the default password set with :meth:`setpassword`. Calling
- :meth:`read` on a closed ZipFile will raise a :exc:`RuntimeError`.
+ :meth:`read` on a closed ZipFile will raise a :exc:`RuntimeError`. Calling
+ :meth:`read` on a ZipFile that uses a compression method other than
+ :const:`ZIP_STORED`, :const:`ZIP_DEFLATED`, :const:`ZIP_BZIP2` or
+ :const:`ZIP_LZMA` will raise a :exc:`NotImplementedError`. An error will also
+ be raised if the corresponding compression module is not available.
.. method:: ZipFile.testzip()