[1] add hash_tabel

BoriskovaDV/docs/data/1-st-exercise/hash_table_phonebook.py

@@ -0,0 +1,47 @@
+from linked_list_phonebook import ll_insert, ll_find, ll_delete, ll_list_all
+
+def hash_function(name, table_size):
+    return hash(name) % table_size
+
+def ht_insert(buckets, name, phone):
+    idx = hash_function(name, len(buckets))
+    head = buckets[idx]
+    new_head = ll_insert(head, name, phone)
+    buckets[idx] = new_head
+    return buckets
+
+def ht_find(buckets, name):
+    idx = hash_function(name, len(buckets))
+    head = buckets[idx]
+    return ll_find(head, name)
+
+def ht_delete(buckets, name):
+    idx = hash_function(name, len(buckets))
+    head = buckets[idx]
+    new_head = ll_delete(head, name)
+    buckets[idx] = new_head
+    return buckets
+
+def ht_list_all(buckets):
+    all_records = []
+    for head in buckets:
+        current = head
+        while current is not None:
+            all_records.append((current['name'], current['phone']))
+            current = current['next']
+    all_records.sort(key=lambda x: x[0])
+    return all_records
+
+if __name__ == '__main__':
+    SIZE = 5
+    buckets = [None] * SIZE
+    
+    ht_insert(buckets, 'Иван', '123-456')
+    ht_insert(buckets, 'Борис', '789-012')
+    ht_insert(buckets, 'Анна', '345-678')
+    ht_insert(buckets, 'Иван', '111-222')
+    print(ht_list_all(buckets))
+    print(ht_find(buckets, 'Анна'))
+    print(ht_find(buckets, 'Петр'))
+    ht_delete(buckets, 'Борис')
+    print(ht_list_all(buckets))