добавлена хеш-таблица

konnovaea/phonebook.py

@@ -29,6 +29,7 @@ def ll_delete(head, name):
             return head
         current = current['next']
     return head
+
 def ll_list_all(head):
     records = []
     current = head
@@ -38,3 +39,37 @@ def ll_list_all(head):
         current = current['next']
     records.sort(key=lambda x: x[0])
     return records
+
+def hash_function(name, table_size):
+    total = 0
+    for ch in name:
+        total = (total*31 + ord(ch)) % table_size
+    return total
+
+def ht_create(size=1000):
+    return [None]*size
+
+def ht_insert(buckets, name, phone):
+    idx = hash_function(name, len(buckets))
+    buckets[idx] = ll_insert(buckets[idx], name, phone)
+    return buckets
+
+def ht_find(buckets, name):
+    idx = hash_function(name, len(buckets))
+    return ll_find(buckets[idx], name)
+
+def ht_delete(buckets, name):
+    idx = hash_function(name, len(buckets))
+    buckets[idx] = ll_delete(buckets[idx], name)
+    return buckets
+
+def ht_list_all(buckets):
+    records = []
+    for bucket in buckets:
+        current = bucket
+        while current is not None:
+            records.append((current['name'], current['phone']))
+            current = current['next']
+    records.sort(key=lambda x: x[0])
+    return records
+