# Buggy code
def _generate_classification_overview_kw_context(self, taxonomy, lang):
    """Create context and kw for a classification overview page."""
    context, kw = taxonomy.provide_overview_context_and_uptodate(lang)

    context = copy(context)
    kw = copy(kw)
    kw["messages"] = self.site.MESSAGES
    kw["translations"] = self.site.config["TRANSLATIONS"]
    kw["filters"] = self.site.config["FILTERS"]
    kw["minimum_post_count"] = (
        taxonomy.minimum_post_count_per_classification_in_overview
    )
    kw["output_folder"] = self.site.config["OUTPUT_FOLDER"]
    kw["pretty_urls"] = self.site.config["PRETTY_URLS"]
    kw["strip_indexes"] = self.site.config["STRIP_INDEXES"]
    kw["index_file"] = self.site.config["INDEX_FILE"]

    # Collect all relevant classifications
    if taxonomy.has_hierarchy:

        def acceptor(node):
            return (
                len(
                    self._filter_list(
                        self.site.posts_per_classification[
                            taxonomy.classification_name
                        ][lang][node.classification_name],
                        lang,
                    )
                )
                >= kw["minimum_post_count"]
            )

        clipped_root_list = [
            hierarchy_utils.clone_treenode(node, parent=None, acceptor=acceptor)
            for node in self.site.hierarchy_per_classification[
                taxonomy.classification_name
            ][lang]
        ]
        clipped_root_list = [node for node in clipped_root_list if node]
        clipped_flat_hierarchy = hierarchy_utils.flatten_tree_structure(
            clipped_root_list
        )

        classifications = [cat.classification_name for cat in clipped_flat_hierarchy]
    else:
        classifications = natsort.natsorted(
            [
                tag
                for tag, posts in self.site.posts_per_classification[
                    taxonomy.classification_name
                ][lang].items()
                if len(self._filter_list(posts, lang)) >= kw["minimum_post_count"]
            ],
            alg=natsort.ns.F | natsort.ns.IC,
        )
        taxonomy.sort_classifications(classifications, lang)

    # Set up classifications in context
    context[taxonomy.overview_page_variable_name] = classifications
    context["has_hierarchy"] = taxonomy.has_hierarchy
    if taxonomy.overview_page_items_variable_name:
        items = [
            (
                classification,
                self.site.link(taxonomy.classification_name, classification, lang),
            )
            for classification in classifications
        ]
        items_with_postcount = [
            (
                classification,
                self.site.link(taxonomy.classification_name, classification, lang),
                len(
                    self._filter_list(
                        self.site.posts_per_classification[
                            taxonomy.classification_name
                        ][lang][classification],
                        lang,
                    )
                ),
            )
            for classification in classifications
        ]
        context[taxonomy.overview_page_items_variable_name] = items
        context[taxonomy.overview_page_items_variable_name + "_with_postcount"] = (
            items_with_postcount
        )
    if taxonomy.has_hierarchy and taxonomy.overview_page_hierarchy_variable_name:
        hier_items = [
            (
                node.name,
                node.classification_name,
                node.classification_path,
                self.site.link(
                    taxonomy.classification_name, node.classification_name, lang
                ),
                node.indent_levels,
                node.indent_change_before,
                node.indent_change_after,
            )
            for node in clipped_flat_hierarchy
        ]
        hier_items_with_postcount = [
            (
                node.name,
                node.classification_name,
                node.classification_path,
                self.site.link(
                    taxonomy.classification_name, node.classification_name, lang
                ),
                node.indent_levels,
                node.indent_change_before,
                node.indent_change_after,
                len(node.children),
                len(
                    self._filter_list(
                        self.site.posts_per_classification[
                            taxonomy.classification_name
                        ][lang][node.classification_name],
                        lang,
                    )
                ),
            )
            for node in clipped_flat_hierarchy
        ]
        context[taxonomy.overview_page_hierarchy_variable_name] = hier_items
        context[taxonomy.overview_page_hierarchy_variable_name + "_with_postcount"] = (
            hier_items_with_postcount
        )
    return context, kw


# Traceback (KeyError)
########################################
TaskError - taskid:render_galleries:output/galleries/index.html
PythonAction Error
Traceback (most recent call last):
File "/home/kwpolska/virtualenvs/nikola-py2/lib/python2.7/site-packages/doit/action.py", line 360, in execute
returned_value = self.py_callable(*self.args, **kwargs)
File "/home/kwpolska/git/nikola/nikola/plugins/task/galleries.py", line 466, in render_gallery_index
self.site.render_template(template_name, output_name, context)
File "/home/kwpolska/git/nikola/scripts/../nikola/nikola.py", line 607, in render_template
template_name, None, local_context)
File "/home/kwpolska/git/nikola/nikola/plugins/template/mako.py", line 88, in render_template
data = template.render_unicode(**context)
File "/home/kwpolska/virtualenvs/nikola-py2/lib/python2.7/site-packages/mako/template.py", line 452, in render_unicode
as_unicode=True)
File "/home/kwpolska/virtualenvs/nikola-py2/lib/python2.7/site-packages/mako/runtime.py", line 807, in _render
**_kwargs_for_callable(callable_, data))
File "/home/kwpolska/virtualenvs/nikola-py2/lib/python2.7/site-packages/mako/runtime.py", line 839, in _render_context
_exec_template(inherit, lclcontext, args=args, kwargs=kwargs)
File "/home/kwpolska/virtualenvs/nikola-py2/lib/python2.7/site-packages/mako/runtime.py", line 865, in _exec_template
callable_(context, *args, **kwargs)
File "/home/kwpolska/Desktop/nikola-translated-path/cache/.mako.tmp/base.tmpl.py", line 91, in render_body
__M_writer(unicode(base.meta_translations()))
File "/home/kwpolska/Desktop/nikola-translated-path/cache/.mako.tmp/base_helper.tmpl.py", line 274, in render_meta_translations
__M_writer(unicode(_link(permalink, None, langname)))
File "/home/kwpolska/git/nikola/scripts/../nikola/nikola.py", line 765, in link
return self.path(*args, is_link=True)
File "/home/kwpolska/git/nikola/scripts/../nikola/nikola.py", line 729, in path
path = self.path_handlers[kind](name, lang)
KeyError: u'/galleries/galleries/index.html'

# Fixed code
def _generate_classification_overview_kw_context(self, taxonomy, lang):
    """Create context and kw for a classification overview page."""
    context, kw = taxonomy.provide_overview_context_and_uptodate(lang)

    context = copy(context)
    context["kind"] = "{}_index".format(taxonomy.classification_name)
    sorted_links = []
    sorted_links_all = []
    for other_lang in sorted(self.site.config["TRANSLATIONS"].keys()):
        sorted_links_all.append((other_lang, None, None))
        if other_lang != lang:
            sorted_links.append((other_lang, None, None))
    context["has_other_languages"] = True
    context["other_languages"] = sorted_links
    context["all_languages"] = sorted_links_all

    kw = copy(kw)
    kw["messages"] = self.site.MESSAGES
    kw["translations"] = self.site.config["TRANSLATIONS"]
    kw["filters"] = self.site.config["FILTERS"]
    kw["minimum_post_count"] = (
        taxonomy.minimum_post_count_per_classification_in_overview
    )
    kw["output_folder"] = self.site.config["OUTPUT_FOLDER"]
    kw["pretty_urls"] = self.site.config["PRETTY_URLS"]
    kw["strip_indexes"] = self.site.config["STRIP_INDEXES"]
    kw["index_file"] = self.site.config["INDEX_FILE"]

    # Collect all relevant classifications
    if taxonomy.has_hierarchy:

        def acceptor(node):
            return (
                len(
                    self._filter_list(
                        self.site.posts_per_classification[
                            taxonomy.classification_name
                        ][lang][node.classification_name],
                        lang,
                    )
                )
                >= kw["minimum_post_count"]
            )

        clipped_root_list = [
            hierarchy_utils.clone_treenode(node, parent=None, acceptor=acceptor)
            for node in self.site.hierarchy_per_classification[
                taxonomy.classification_name
            ][lang]
        ]
        clipped_root_list = [node for node in clipped_root_list if node]
        clipped_flat_hierarchy = hierarchy_utils.flatten_tree_structure(
            clipped_root_list
        )

        classifications = [cat.classification_name for cat in clipped_flat_hierarchy]
    else:
        classifications = natsort.natsorted(
            [
                tag
                for tag, posts in self.site.posts_per_classification[
                    taxonomy.classification_name
                ][lang].items()
                if len(self._filter_list(posts, lang)) >= kw["minimum_post_count"]
            ],
            alg=natsort.ns.F | natsort.ns.IC,
        )
        taxonomy.sort_classifications(classifications, lang)

    # Set up classifications in context
    context[taxonomy.overview_page_variable_name] = classifications
    context["has_hierarchy"] = taxonomy.has_hierarchy
    if taxonomy.overview_page_items_variable_name:
        items = [
            (
                classification,
                self.site.link(taxonomy.classification_name, classification, lang),
            )
            for classification in classifications
        ]
        items_with_postcount = [
            (
                classification,
                self.site.link(taxonomy.classification_name, classification, lang),
                len(
                    self._filter_list(
                        self.site.posts_per_classification[
                            taxonomy.classification_name
                        ][lang][classification],
                        lang,
                    )
                ),
            )
            for classification in classifications
        ]
        context[taxonomy.overview_page_items_variable_name] = items
        context[taxonomy.overview_page_items_variable_name + "_with_postcount"] = (
            items_with_postcount
        )
    if taxonomy.has_hierarchy and taxonomy.overview_page_hierarchy_variable_name:
        hier_items = [
            (
                node.name,
                node.classification_name,
                node.classification_path,
                self.site.link(
                    taxonomy.classification_name, node.classification_name, lang
                ),
                node.indent_levels,
                node.indent_change_before,
                node.indent_change_after,
            )
            for node in clipped_flat_hierarchy
        ]
        hier_items_with_postcount = [
            (
                node.name,
                node.classification_name,
                node.classification_path,
                self.site.link(
                    taxonomy.classification_name, node.classification_name, lang
                ),
                node.indent_levels,
                node.indent_change_before,
                node.indent_change_after,
                len(node.children),
                len(
                    self._filter_list(
                        self.site.posts_per_classification[
                            taxonomy.classification_name
                        ][lang][node.classification_name],
                        lang,
                    )
                ),
            )
            for node in clipped_flat_hierarchy
        ]
        context[taxonomy.overview_page_hierarchy_variable_name] = hier_items
        context[taxonomy.overview_page_hierarchy_variable_name + "_with_postcount"] = (
            hier_items_with_postcount
        )
    return context, kw