use Path in type annotations oat 2

corrlib/tools.py

@@ -1,6 +1,7 @@
 import os
 from configparser import ConfigParser
 from typing import Any
+from pathlib import Path
 
 CONFIG_FILENAME = ".corrlib"
 cached: bool = True
@@ -73,7 +74,7 @@ def k2m(k: float) -> float:
     return (1/(2*k))-4
 
 
-def set_config(path: str, section: str, option: str, value: Any) -> None:
+def set_config(path: Path, section: str, option: str, value: Any) -> None:
     """
     Set configuration parameters for the library.
 
@@ -100,7 +101,7 @@ def set_config(path: str, section: str, option: str, value: Any) -> None:
     return
 
 
-def get_db_file(path: str) -> str:
+def get_db_file(path: Path) -> str:
     """
     Get the database file associated with the library at the given path.
 
@@ -122,7 +123,7 @@ def get_db_file(path: str) -> str:
     return db_file
 
 
-def cache_enabled(path: str) -> bool:
+def cache_enabled(path: Path) -> bool:
     """
     Check, whether the library is cached.
     Fallback is true.