Fix docstring and typing

modified:   src/hibpcli/leaks.py

src/hibpcli/leaks.py

@@ -1,5 +1,6 @@
 import hashlib
 import socket
+from typing import Set
 
 import httpx
 from hibpcli.exceptions import ApiError
@@ -16,8 +17,20 @@ def __contains__(self, password: str) -> bool:
             self._pages[hash_head] = self._load_page(hash_head)
         return hash_tail in self._pages[hash_head]
 
-    def _load_page(self, hash_head: str) -> dict:
-        """Load a list of leaked passwords for a given hash_head and return a set."""
+    @staticmethod
+    def _generate_hash(password: str) -> str:
+        # using sha1 here is no security issue
+        # the API uses it, so there is no other way to access the data
+        hash_object = hashlib.sha1(bytes(password, "UTF-8"))  # nosec
+        hex_digest = hash_object.hexdigest().upper()
+        return hex_digest
+
+    @staticmethod
+    def _load_page(hash_head: str) -> Set:
+        """Load a list of hash/occurrence pairs for a given hash_head.
+
+        Returns a set of hash_tails only.
+        """
         try:
             result = httpx.get(f"https://api.pwnedpasswords.com/range/{hash_head}").text
         except socket.gaierror:
@@ -28,10 +41,3 @@ def _load_page(self, hash_head: str) -> dict:
             # leak, separated by a colon
             # cut off string - information after the hash is of no interest
             return {line[:35] for line in result.splitlines()}
-
-    def _generate_hash(self, password: str) -> str:
-        # using sha1 here is no security issue
-        # the API uses it, so there is no other way to access the data
-        hash_object = hashlib.sha1(bytes(password, "UTF-8"))  # nosec
-        hex_digest = hash_object.hexdigest().upper()
-        return hex_digest