add type annotations to ICU tokenizer helper modules

nominatim/tokenizer/icu_token_analysis.py

@@ -8,15 +8,22 @@
 Container class collecting all components required to transform an OSM name
 into a Nominatim token.
 """
-
+from typing import Mapping, Optional, TYPE_CHECKING
 from icu import Transliterator
 
+from nominatim.tokenizer.token_analysis.base import Analyser
+
+if TYPE_CHECKING:
+    from typing import Any
+    from nominatim.tokenizer.icu_rule_loader import TokenAnalyzerRule # pylint: disable=cyclic-import
+
 class ICUTokenAnalysis:
     """ Container class collecting the transliterators and token analysis
         modules for a single NameAnalyser instance.
     """
 
-    def __init__(self, norm_rules, trans_rules, analysis_rules):
+    def __init__(self, norm_rules: str, trans_rules: str,
+                 analysis_rules: Mapping[Optional[str], 'TokenAnalyzerRule[Any]']):
         self.normalizer = Transliterator.createFromRules("icu_normalization",
                                                          norm_rules)
         trans_rules += ";[:Space:]+ > ' '"
@@ -25,11 +32,11 @@ class ICUTokenAnalysis:
         self.search = Transliterator.createFromRules("icu_search",
                                                      norm_rules + trans_rules)
 
-        self.analysis = {name: arules.create(self.normalizer, self.to_ascii, arules.config)
+        self.analysis = {name: arules.create(self.normalizer, self.to_ascii)
                          for name, arules in analysis_rules.items()}
 
 
-    def get_analyzer(self, name):
+    def get_analyzer(self, name: str) -> Analyser:
         """ Return the given named analyzer. If no analyzer with that
             name exists, return the default analyzer.
         """