Problem reported upstream:
https://github.com/linsomniac/python-memcached/issues/176

---
 memcache.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/memcache.py b/memcache.py
index 05b6657..b935681 100644
--- a/memcache.py
+++ b/memcache.py
@@ -1300,8 +1300,8 @@ class Client(threading.local):
             key = key[1]
         if key is None:
             raise Client.MemcachedKeyNoneError("Key is None")
-        if key is '':
-            if key_extra_len is 0:
+        if key == '':
+            if key_extra_len == 0:
                 raise Client.MemcachedKeyNoneError("Key is empty")

             #  key is empty but there is some other component to key
--
2.26.2
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<tr><td><span title='2023-07-23 22:26:09 -0400'>2023-07-23</span></td><td><a href='/guix/commit/gnu/packages/aux-files?id=db775e7367e8deffb513aad94f4afb875d796d0b'>gnu: Remove linux-libre 6.3.</a><span class='msg-avail'>...<span class='msg-tooltip'>This kernel series is no longer supported upstream.

* gnu/packages/linux.scm (linux-libre-6.3-version, linux-libre-6.3-gnu-revision,
deblob-scripts-6.3, linux-libre-6.3-pristine-source, linux-libre-6.3-source,
linux-libre-headers-6.3, linux-libre-6.3): Remove variables.
* gnu/packages/aux-files/linux-libre/6.3-arm.conf,
gnu/packages/aux-files/linux-libre/6.3-arm64.conf,
gnu/packages/aux-files/linux-libre/6.3-i686.conf,
gnu/packages/aux-files/linux-libre/6.3-x86_64.conf: Delete files.
* Makefile.am (AUX_FILES): Remove them.
* gnu/packages/patches/linux-libre-wireguard-postup-privkey.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.
</span></span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2023-07-15 14:02:40 -0400'>2023-07-15</span></td><td><a href='/guix/commit/gnu/packages/aux-files?id=49f74b67a44882d2af0529abf3e60a9c37512f2c'>gnu: Add linux-libre 6.4</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/linux.scm (linux-libre-6.4-version, linux-libre-6.4-gnu-revision,
deblob-scripts-6.4, linux-libre-6.4-pristine-source, linux-libre-6.4-source,
linux-libre-headers-6.4, linux-libre-6.4: New variables.
* gnu/packages/aux-files/linux-libre/6.4-arm.conf,
* gnu/packages/aux-files/linux-libre/6.4-arm64.conf,
* gnu/packages/aux-files/linux-libre/6.4-i686.conf,
* gnu/packages/aux-files/linux-libre/6.4-x86_64.conf: New files.
* Makefile.am (AUX_FILES): Add them.
</span></span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2023-05-31 21:21:25 -0400'>2023-05-31</span></td><td><a href='/guix/commit/gnu/packages/aux-files?id=13e2138c230431368ebf32df527f4b5d1e458e4b'>gnu: Remove linux-libre 6.2.</a><span class='msg-avail'>...<span class='msg-tooltip'>This kernel series is no longer supported upstream.

* gnu/packages/linux.scm (linux-libre-6.2-version, linux-libre-6.2-gnu-revision,
deblob-scripts-6.2, linux-libre-6.2-pristine-source, linux-libre-6.2-source,
linux-libre-headers-6.2, linux-libre-6.2): Remove variables.
* gnu/packages/aux-files/linux-libre/6.2-arm.conf,
gnu/packages/aux-files/linux-libre/6.2-arm64.conf,
gnu/packages/aux-files/linux-libre/6.2-i686.conf,
gnu/packages/aux-files/linux-libre/6.2-x86_64.conf: Delete files.
* Makefile.am (AUX_FILES): Remove them.
</span></span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2023-05-16 13:15:13 -0400'>2023-05-16</span></td><td><a href='/guix/commit/gnu/packages/aux-files?id=c8e599b9391f789a8a3e2183fc8f0c2a5061ceb0'>gnu: Add linux-libre 6.3.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/linux.scm (linux-libre-6.3-version, linux-libre-6.3-gnu-revision,
deblob-scripts-6.3, linux-libre-6.3-pristine-source, linux-libre-6.3-source,
linux-libre-headers-6.3, linux-libre-6.3): New variables.
* gnu/packages/aux-files/linux-libre/6.3-arm.conf,
gnu/packages/aux-files/linux-libre/6.3-arm64.conf,
gnu/packages/aux-files/linux-libre/6.3-i686.conf,
gnu/packages/aux-files/linux-libre/6.3-x86_64.conf: New files.
* Makefile.am (AUX_FILES): Add them.
</span></span></td><td>Leo Famulari</td></tr>