mypy: minimal annotations to enable a clean run

.mypy.ini

@@ -0,0 +1,16 @@
+[mypy]
+
+[mypy-icu.*]
+ignore_missing_imports = True
+
+[mypy-psycopg2.*]
+ignore_missing_imports = True
+
+[mypy-psutil]
+ignore_missing_imports = True
+
+[mypy-osmium.*]
+ignore_missing_imports = True
+
+[mypy-datrie.*]
+ignore_missing_imports = True

nominatim/config.py

@@ -7,6 +7,7 @@
 """
 Nominatim configuration accessor.
 """
+from typing import Dict, Any
 import logging
 import os
 from pathlib import Path
@@ -18,7 +19,7 @@ from dotenv import dotenv_values
 from nominatim.errors import UsageError
 
 LOG = logging.getLogger()
-CONFIG_CACHE = {}
+CONFIG_CACHE : Dict[str, Any] = {}
 
 def flatten_config_list(content, section=''):
     """ Flatten YAML configuration lists that contain include sections

nominatim/tools/migration.py

@@ -7,6 +7,7 @@
 """
 Functions for database migration to newer software versions.
 """
+from typing import List, Tuple, Callable
 import logging
 
 from psycopg2 import sql as pysql
@@ -20,7 +21,7 @@ from nominatim.errors import UsageError
 
 LOG = logging.getLogger()
 
-_MIGRATION_FUNCTIONS = []
+_MIGRATION_FUNCTIONS : List[Tuple[str, Callable]] = []
 
 def migrate(config, paths):
     """ Check for the current database version and execute migrations,

nominatim/tools/replication.py

@@ -21,8 +21,8 @@ try:
     from osmium.replication.server import ReplicationServer
     from osmium import WriteHandler
 except ImportError as exc:
-    logging.getLogger().fatal("pyosmium not installed. Replication functions not available.\n"
+    logging.getLogger().critical("pyosmium not installed. Replication functions not available.\n"
-                              "To install pyosmium via pip: pip3 install osmium")
+                                 "To install pyosmium via pip: pip3 install osmium")
     raise UsageError("replication tools not available") from exc
 
 LOG = logging.getLogger()

nominatim/tools/special_phrases/sp_importer.py

@@ -33,7 +33,7 @@ class SPImporter():
 
         Take a sp loader which load the phrases from an external source.
     """
-    def __init__(self, config, db_connection, sp_loader) -> None:
+    def __init__(self, config, db_connection, sp_loader):
         self.config = config
         self.db_connection = db_connection
         self.sp_loader = sp_loader