реализован связный список

konnovaea/phonebook.py

@@ -0,0 +1,40 @@
+def ll_insert(head, name, phone):
+    current = head 
+    while current is not None:
+        if current['name'] == name:
+            current['phone'] = phone
+            return head
+        current = current['next']
+
+    new_node = {'name': name, 'phone': phone, 'next': head}
+    return new_node
+
+def ll_find(head, name):
+    current = head
+    while current is not None:
+        if current['name'] == name:
+            return current['phone']
+        current = current['next']
+    return None
+
+def ll_delete(head, name):
+    if head is None:
+        return None
+    if head['name'] == name:
+        return head['next']
+    current = head
+    while current['next'] is not None:
+        if current['next']['name'] == name:
+            current['next'] = current['naext']['next']
+            return head
+        current = current['next']
+    return head
+def ll_list_all(head):
+    records = []
+    current = head
+
+    while current is  not None:
+        records.append((current['name'], current['phine']))
+        current = current['next']
+    records.sort(key=lambda x: x[0])
+    return records