[2] adding ll_find and ll_delete

BudakovIS/docs/LinkedListPhoneBook.py

@@ -29,7 +29,7 @@ def ll_insert(head, name, phone):
 
 
 
-ptiny("====== TESTING ll_insert FUNC ========")
+print("====== TESTING ll_insert FUNC ========")
 head = ll_insert(head,'Ivan','123-456')
 
 print(head)
@@ -49,4 +49,43 @@ print(head)
 head = ll_insert(head, 'Boris', '111-222')
 
 print(head)
-print("======= END TEST =======")
+print(f"======= END TEST =======\n\n\n")
+
+
+def ll_find(head, name):
+    curent = head
+    while curent is not None:
+        if curent['name'] == name:
+            return curent['phone']
+        curent = curent['next']
+    return None
+
+print("====== TESTING ll_find FUNC ======")
+
+print("Ivan`s phone: "+ ll_find(head, 'Ivan'))
+
+print("Dima`s phone: "+ ll_find(head, 'Dima'))
+
+print("Boris phone: "+ ll_find(head, 'Boris'))
+
+print(f"====== END TEST ======\n\n\n")
+
+
+def ll_delete(head, name):
+    if head is None:
+        return None
+
+    if head['name'] == name:
+        return head['next']
+
+    prev = head
+    curent = head['next']
+    while curent is not None:
+        if curent['name'] == name:
+            prev['next'] = curent['next']
+            return head
+        prev = curent
+        curent = curent['next']
+    return head
+
+print("Del of Dima:", ll_delete(head, 'Dima'))