Do not crash on grouping items without an English label
When grouping_link is used, integraality looks up the
English label of each grouping item to build the link
(which is debatable, and under re-consideration at T237276)
However, this fails if the item has no English label (with [1]).
Let's just catch the KeyError, and agree to revisit
the whole label idea with T237276.
Also add some info-level logging of the issue.
[1] Stacktrace:
File "./integraality/property_statistics.py", line 681, in <module>
main()
File "./integraality/property_statistics.py", line 677, in main
print(stats.retrieve_and_process_data())
File "./integraality/property_statistics.py", line 619, in retrieve_and_process_data
text += self.make_stats_for_one_grouping(grouping, item_count, higher_grouping)
File "./integraality/property_statistics.py", line 546, in make_stats_for_one_grouping
label = group_item.labels["en"]
File "/usr/local/lib/python3.7/site-packages/pywikibot/page/_collections.py", line 46, in __getitem__
return self._data[key]
KeyError: 'en'Bug: T283287