René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Many pure python tools that have a special cases for dict should accept frozendict as well.","articleBody":"I'll fix the ones in `collections`.  Some other priorities are `pprint` and `ElementTree`\n\nHere's a `rg dict | rg isinstance` scan of the `Lib` directory:\n\n```python\nunittest/mock.py:        if isinstance(self.in_dict, str):\ntrace.py:                             if isinstance(d, dict)]\nrlcompleter.py:        if namespace and not isinstance(namespace, dict):\nrlcompleter.py:                        isinstance(thisobject.__dict__.get(word),\ntomllib/_parser.py:            if not isinstance(cont, dict):\ntomllib/_parser.py:    if isinstance(value, (dict, list)):\ntomllib/_parser.py:        if isinstance(value, (dict, list)):\ntomllib/_parser.py:        if isinstance(float_value, (dict, list)):\nmultiprocessing/managers.py:                if not isinstance(method_to_typeid, dict):\nfunctools.py:           (kwds is not None and not isinstance(kwds, dict)) or\nfunctools.py:           (namespace is not None and not isinstance(namespace, dict))):\npprint.py:        if isinstance(object, self._dict_items_view):\nturtle.py:        if isinstance(pen, dict):\noptparse.py:                not isinstance(self.callback_kwargs, dict)):\noptparse.py:        elif isinstance(other, dict):\nlinecache.py:    if module_globals is not None and not isinstance(module_globals, dict):\nxml/etree/ElementTree.py:        if not isinstance(attrib, dict):\n_pyrepl/input.py:        if isinstance(d, dict):\ntkinter/__init__.py:    if isinstance(cnfs, dict):\ntkinter/__init__.py:        if isinstance(cnf, (dict, tuple)):\n_pyrepl/base_eventqueue.py:            if isinstance(k, dict):\ntest/_test_multiprocessing.py:    def test_dict_isinstance(self):\n_pyrepl/readline.py:    if not isinstance(namespace, dict):\nlogging/config.py:        if not isinstance(value, ConvertingDict) and isinstance(value, dict):\nlogging/config.py:                    elif isinstance(qspec, dict):\nlogging/config.py:                        elif isinstance(lspec, dict):\nlogging/config.py:                            assert isinstance(d, dict)\ntest/test_pyrepl/test_terminfo.py:                        isinstance(ncurses_data[key], dict)\ntest/test_pyrepl/test_terminfo.py:                            isinstance(ncurses_data[key], dict)\ntest/test_launcher.py:        if isinstance(value, dict):\ntest/test_launcher.py:            tags = [t for t in company_data if isinstance(company_data[t], dict)]\ntest/test_launcher.py:            tags = [t for t in company_data if isinstance(company_data[t], dict)]\ntest/test_isinstance.py:        self.assertFalse(issubclass(dict, float|str))\ntest/test_marshal.py:    elif isinstance(obj, dict):\ntest/test_format.py:    if isinstance(args, dict):\ntest/test_build_details.py:                        self.assertFalse(isinstance(sys.implementation.version, dict))\n_pydecimal.py:        elif not isinstance(traps, dict):\n_pydecimal.py:        elif not isinstance(flags, dict):\n_pydecimal.py:        if not isinstance(d, dict):\ncollections/__init__.py:        if not isinstance(other, dict):\ncollections/__init__.py:        if not isinstance(other, dict):\ncollections/__init__.py:        if isinstance(other, dict):\ncollections/__init__.py:        if isinstance(other, dict):\ntest/test_module/__init__.py:        self.assertTrue(isinstance(foo.__dict__, dict))\nprofiling/sampling/heatmap_collector.py:            if isinstance(data, dict):\ntest/test_code.py:                if isinstance(globalvars, dict):\ntest/test_urllib2_localnet.py:        assert isinstance(users, dict)\nannotationlib.py:            or isinstance(self.__cell__, dict)\nannotationlib.py:        if isinstance(self.__cell__, dict):\nannotationlib.py:                if isinstance(self.__cell__, dict) and isinstance(other.__cell__, dict)\nannotationlib.py:                if isinstance(self.__cell__, dict) else id(self.__cell__),\nannotationlib.py:        if not isinstance(ann, dict):\nannotationlib.py:    if not isinstance(ann, dict):\ntest/test_io/test_general.py:                if isinstance(v, dict):\ntest/test_compiler_assemble.py:            elif isinstance(value, dict):\njson/encoder.py:                    elif isinstance(value, dict):\njson/encoder.py:                    elif isinstance(value, dict):\njson/encoder.py:        elif isinstance(o, dict):\nplistlib.py:            if not isinstance(self.stack[-1], dict):\nplistlib.py:        if self.current_key or not isinstance(self.stack[-1], dict):\nplistlib.py:        elif isinstance(value, dict):\nplistlib.py:        if isinstance(value, dict):\nplistlib.py:        elif isinstance(value, dict):\ntest/test_tomllib/burntsushi.py:    elif isinstance(obj, dict):\ntest/test_tomllib/burntsushi.py:    if isinstance(obj, dict):\ninspect.py:        if isinstance(dict_obj, (staticmethod, types.BuiltinMethodType)):\ninspect.py:        elif isinstance(dict_obj, (classmethod, types.ClassMethodDescriptorType)):\ninspect.py:        elif isinstance(dict_obj, property):\ninspect.py:            if isinstance(slots, dict) and name in slots:\ninspect.py:            (kwdefaults is None or isinstance(kwdefaults, dict)))\nxmlrpc/client.py:        if isinstance(item, dict):\ntest/test_importlib/resources/zip.py:        if isinstance(contents, dict):\nimportlib/_bootstrap_external.py:    if not isinstance(module_globals, dict):\ntest/test_descrtut.py:    \u003e\u003e\u003e isinstance([], dict)\nenum.py:    if isinstance(obj, dict):\ntest/test_import/test_lazy_imports.py:            assert isinstance(sys.lazy_modules, dict), \"sys.lazy_modules is not a dict\"\ntest/test_type_annotations.py:                if not isinstance(self.my_annotations, dict):\ntest/test_type_annotations.py:                if not isinstance(value, dict):\ndataclasses.py:    elif isinstance(obj, dict):\ntest/string_tests.py:        elif isinstance(obj, dict):\ntest/test_pyclbr.py:                if (not isinstance(classdict[name], ClassMethodType) or\ncompression/zstd/_zstdfile.py:        if options is not None and not isinstance(options, dict):\ncompression/zstd/__init__.py:    if not isinstance(dict_size, int):\ncompression/zstd/__init__.py:    if not isinstance(zstd_dict, ZstdDict):\ncompression/zstd/__init__.py:    if not isinstance(dict_size, int):\n```\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-145060\n* gh-145125\n* gh-145508\n* gh-146295\n* gh-146465\n* gh-146466\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/rhettinger","@type":"Person","name":"rhettinger"},"datePublished":"2026-02-20T22:58:40.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/145056/cpython/issues/145056"}