Add checks

src/dictionaries/morphosyntactic/ner_file.py

@@ -191,11 +191,19 @@ class NERFileMorphosyntacticDictionary(MorphosyntacticDictionary):
                 original_entries
             )
 
-        possible_lemmas = set(self._dictionary[detection_type][required_tags[0]].keys())
+        possible_lemmas = set(
+            self._dictionary[detection_type][required_tags[0]].keys()
+        ) \
+            if detection_type in self._dictionary \
+            and required_tags[0] in self._dictionary[detection_type] \
+            else set()
         for tag in required_tags[1:]:
-            possible_lemmas.intersection_update(
-                self._dictionary[detection_type][tag].keys()
-            )
+            keys = self._dictionary[detection_type][tag].keys() \
+                if detection_type in self._dictionary \
+                and tag in self._dictionary[detection_type] \
+                else set()
+            if keys:
+                possible_lemmas.intersection_update(keys)
 
         if len(possible_lemmas) == 0:
             return [self.get_random_replacement(original_entries[0])] * len(
@@ -208,7 +216,13 @@ class NERFileMorphosyntacticDictionary(MorphosyntacticDictionary):
         for entry in original_entries:
             if isinstance(entry, MorphosyntacticInfoMixin):
                 morpho_tag = entry.morpho_tag
-                word = self._dictionary[detection_type][morpho_tag][lemma]
+                if detection_type in self._dictionary \
+                        and morpho_tag in self._dictionary[detection_type] \
+                        and lemma in \
+                        self._dictionary[detection_type][morpho_tag]:
+                    word = self._dictionary[detection_type][morpho_tag][lemma]
+                else:
+                    word = lemma
             else:
                 word = lemma