diff --git a/u7/hash_table.py b/u7/hash_table.py
index 5904eb6..c5ca737 100644
--- a/u7/hash_table.py
+++ b/u7/hash_table.py
@@ -1,10 +1,9 @@
 
-
 class HashTable:
     def __init__(self, capacity=10):
         """Vytvor prázdnu tabuľku s kladnou celočíselnou kapacitou."""
         if type(capacity) is not int:
-            raise TypeError("Is not integer")
+            raise TypeError("It's not integer")
         if capacity <= 0:
             raise ValueError("Capacity > 0")
 
@@ -22,7 +21,7 @@ class HashTable:
     def hash(self, key):
         """Vráť polynomiálny hash kľúča modulo aktuálna kapacita."""
         if not isinstance(key, str):
-            raise TypeError("Key - not string!")
+            raise TypeError("Key must be a string")
 
         h = 0
         for znak in key:
@@ -59,7 +58,9 @@ class HashTable:
             raise TypeError("Key must be a string")
 
     def __len__(self):
-        pass
+        return self._size
 
     def __iter__(self):
-        pass
+        for item in self._table:
+            if item is not None and item is not self._DELETED:
+                yield item[0]