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
='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
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<div class='path'>path: <a href='/guix/log/?id=4d272fa3a9f2e156314d88685336573a69e90678'>root</a>/<a href='/guix/log/etc?id=4d272fa3a9f2e156314d88685336573a69e90678'>etc</a>/<a href='/guix/log/etc/news.scm?id=4d272fa3a9f2e156314d88685336573a69e90678'>news.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/etc/news.scm?id=4d272fa3a9f2e156314d88685336573a69e90678&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-10-03 14:07:29 +0200'>2023-10-03</span></td><td><a href='/guix/commit/etc/news.scm?id=18b4db357be323d5a594f9caec24f9203957667b'>news: Add 'de' translation.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/news.scm: Add German translation of offloading entry.
</span></span></td><td>Florian Pelz</td></tr>
<tr><td><span title='2023-10-03 14:07:08 +0200'>2023-10-03</span></td><td><a href='/guix/commit/etc/news.scm?id=2503376827448101cb6fd2ad1e05745911e3c984'>news: Fix typo.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/news.scm: Fix typo in the English text on offloading.
</span></span></td><td>Florian Pelz</td></tr>
<tr><td><span title='2023-10-01 23:01:34 +0200'>2023-10-01</span></td><td><a href='/guix/commit/etc/news.scm?id=b9fae146d6cc4a6968a8eb18beef29aa1414a31e'>news: Add entry for declarative offloading.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/news.scm: Add entry.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-07-23 22:26:00 -0400'>2023-07-23</span></td><td><a href='/guix/commit/etc/news.scm?id=16e2547df5774841c59941cbabda65a6cba1244b'>news: Add entry about the removal of linux-libre 6.3.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/news.scm: Add entry.
</span></span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2023-07-23 22:26:09 -0400'>2023-07-23</span></td><td><a href='/guix/commit/etc/news.scm?id=bb7d40c1cd2eaa9256e7cbbc397aac4eb4a56230'>news: Add entry for the linux-libre 6.4 update.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/news.scm: Add entry.
</span></span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2023-06-21 00:10:49 +0200'>2023-06-21</span></td><td><a href='/guix/commit/etc/news.scm?id=bcdff1d9fcd7cdeef34ee2c0243f4aae835013dc'>news: Fix typo.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/news.scm: Fix typo in French version.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-06-18 23:45:12 +0200'>2023-06-18</span></td><td><a href='/guix/commit/etc/news.scm?id=bf9afedef9c55aa0092b562077d9f2c743d9a29c'>news: Add entry for 'guix locate'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/news.scm: Add entry.

Co-authored-by: Florian Pelz &lt;pelzflorian@pelzflorian.de&gt;
</span></span></td><td>Ludovic Courtès</td></tr>