Cannot handle unhashable types in function arguments

[thet]

plone.memoize.view.memoize cannot handle function arguments which are unhashable types.

E.g.:

When adding this example to view.rst:

$ git diff
diff --git a/plone/memoize/view.rst b/plone/memoize/view.rst
index 45de49c..bb92b48 100644
--- a/plone/memoize/view.rst
+++ b/plone/memoize/view.rst
@@ -89,6 +89,9 @@ We support memoization of multiple signatures as long as all signature values ar
     >>> print(msg.getMsg('J.D.', **{'raise':'roofbeams'}))
     J.D.: goodbye cruel world! raise--roofbeams
 
+    >>> print(msg.getMsg('J.D.', lower=['shields', 'engines']))
+    J.D.: goodbye cruel world! lower--['shields', 'engines']
+
 We can alter data underneath, but nothing changes::
 
     >>> msg.txt1 = 'sound and fury'

Running the tests with tox run -e py311 fails with::

File "plone.memoize/.tox/py311/lib/python3.11/site-packages/plone/memoize/view.rst", line 92, in view.rst
Failed example:
    print(msg.getMsg('J.D.', lower=['shields', 'engines']))
Exception raised:
    Traceback (most recent call last):
      File "~/.pyenv/versions/3.11.2/lib/python3.11/doctest.py", line 1351, in __run
        exec(compile(example.source, filename, "single",
      File "<doctest view.rst[23]>", line 1, in <module>
        print(msg.getMsg('J.D.', lower=['shields', 'engines']))
      File "plone.memoize/.tox/py311/lib/python3.11/site-packages/plone/memoize/view.py", line 47, in memogetter
        frozenset(kwargs.items()),
    TypeError: unhashable type: 'list'

Likewise with dicts:

Adding:

$ git diff
diff --git a/plone/memoize/view.rst b/plone/memoize/view.rst
index 45de49c..8589dd3 100644
--- a/plone/memoize/view.rst
+++ b/plone/memoize/view.rst
@@ -89,6 +89,9 @@ We support memoization of multiple signatures as long as all signature values ar
     >>> print(msg.getMsg('J.D.', **{'raise':'roofbeams'}))
     J.D.: goodbye cruel world! raise--roofbeams
 
+    >>> print(msg.getMsg('J.D.', actions={'open': ['gates']}))
+    J.D.: goodbye cruel world! actions--{'open': ['gates']}
+
 We can alter data underneath, but nothing changes::
 
     >>> msg.txt1 = 'sound and fury'

tox run -e py311 Results in:

File "plone.memoize/.tox/py311/lib/python3.11/site-packages/plone/memoize/view.rst", line 92, in view.rst
Failed example:
    print(msg.getMsg('J.D.', actions={'open': ['gates']}))
Exception raised:
    Traceback (most recent call last):
      File "~/.pyenv/versions/3.11.2/lib/python3.11/doctest.py", line 1351, in __run
        exec(compile(example.source, filename, "single",
      File "<doctest view.rst[23]>", line 1, in <module>
        print(msg.getMsg('J.D.', actions={'open': ['gates']}))
      File "plone.memoize/.tox/py311/lib/python3.11/site-packages/plone/memoize/view.py", line 47, in memogetter
        frozenset(kwargs.items()),
    TypeError: unhashable type: 'dict'