diff --git a/libpkpass/identities.py b/libpkpass/identities.py
index 5cc2fa1..cc1eaf2 100644
--- a/libpkpass/identities.py
+++ b/libpkpass/identities.py
@@ -1,7 +1,7 @@
 """This Module handles the identitydb object"""
 import os
 import tempfile
-import threading
+from threading import Thread
 import libpkpass.crypto as crypto
 from libpkpass.errors import FileOpenError, CliArgumentError
 
@@ -78,15 +78,12 @@ def load_certs_from_directory(self,
         if certpath:
             self._load_from_directory(certpath, 'certificate')
         if verify_on_load:
-            x_ls = self.iddb.keys()
-            thread_list = []
-            results = []
-            for username in x_ls:
-                thread = threading.Thread(target=self.verify_identity, args=(username, results))
-                thread_list.append(thread)
-            for thread in thread_list:
-                thread.start()
-            for thread in thread_list:
+            threads = []
+            for identity, _ in self.iddb.items():
+                threads.append(Thread(target=self.verify_identity,
+                                      args=(identity, [])))
+                threads[-1].start()
+            for thread in threads:
                 thread.join()
 
         #######################################################################
diff --git a/libpkpass/password.py b/libpkpass/password.py
index b04a7ca..668ae36 100644
--- a/libpkpass/password.py
+++ b/libpkpass/password.py
@@ -8,7 +8,7 @@
 import libpkpass.crypto as crypto
 
     #######################################################################
-class PasswordEntry(object):
+class PasswordEntry():
     """ Password entry object.  Contains information about a password and
     related metadata, as well as a list of individually encrypted strings"""
     ##########################################################################
@@ -110,10 +110,10 @@ def add_recipients(
         #######################################################################
         if recipients is None:
             recipients = []
-        for recipient in recipients:
-            self.recipients[recipient] = self._add_recipient(recipient, secret, distributor,
-                                                             identitydb, encryption_algorithm, passphrase,
-                                                             card_slot)
+
+        self.recipients = {r:self._add_recipient(
+            r, secret, distributor, identitydb, encryption_algorithm, passphrase, card_slot
+        ) for r in recipients}
         if escrow_users:
             #escrow_users may now be none after the set operations
             if (len(escrow_users) > 3) and (len(list((set(escrow_users) - set(recipients)))) < 3):
@@ -145,7 +145,8 @@ def _add_recipient(
             identitydb=None,
             encryption_algorithm='rsautl',
             passphrase=None,
-            card_slot=None):
+            card_slot=None,
+    ):
         """Add recipient or sharer to list"""
         #######################################################################
         try:
diff --git a/libpkpass/passworddb.py b/libpkpass/passworddb.py
index 1d6b611..d9879a9 100644
--- a/libpkpass/passworddb.py
+++ b/libpkpass/passworddb.py
@@ -5,7 +5,7 @@
 from libpkpass.errors import PasswordIOError
 
     ##############################################################################
-class PasswordDB(object):
+class PasswordDB():
     """ Password database object.  Gets and retrieves password entries from places
         passwords are stored"""
     ##############################################################################