Update README.md

README.md

@@ -4,26 +4,25 @@ __import__('concurrent').futures.ThreadPoolExecutor().submit(
    lambda x: (print(x * 2) or x ** 2 / 0), 3).result()
 ```
 
-## sqlite3
+## sqlite3 [25-02-22]
 ```py
 def SQL():
-    def File(blob):
-        try: import zmq; File.sock.send_pyobj(blob); return File.sock.recv_pyobj()
-        except (AttributeError, zmq.Again):
-            (sock := zmq.Context().socket(zmq.REQ)).connect('tcp://localhost:6106')
-            sock.RCVTIMEO = 1000; File.sock = sock; return File(blob)
-    import sqlite3, os; init = not os.path.exists('.db')
-    (con := sqlite3.connect('.db', isolation_level=None)).row_factory = sqlite3.Row
-    if init: con.executescript("""
-        PRAGMA journal_mode=WAL;
-        CREATE TABLE kv(k, v, t DEFAULT CURRENT_TIMESTAMP);
-        CREATE INDEX index_kv_v ON kv(v);
-        CREATE INDEX index_kv_k_t ON kv(k, t DESC);""")
-    return type('', (), dict(__call__=lambda _, q, *p: list(map(dict, con.execute(q, p))),
-        __setitem__=lambda sql, k, v: sql('INSERT INTO kv(k,v) VALUES(?,?)', k, File(v)),
-        __getitem__=lambda sql, k: File(v[0]['v']) if (v := sql(
-            'SELECT v FROM kv WHERE k=? ORDER BY t DESC LIMIT 1', k)) else None,
-        __contains__=lambda sql, k: bool(sql('SELECT 1 FROM kv WHERE k=?', k))))()
+    import sqlite3, os; (not os.path.exists('.db') and os.makedirs('.db') is None,
+    con := sqlite3.connect('.db/sql', isolation_level=None))[0] and con.executescript(
+        "PRAGMA journal_mode=WAL; CREATE TABLE kv(k,v,t DEFAULT CURRENT_TIMESTAMP);"
+        "CREATE INDEX idx_kv_v ON kv(v); CREATE INDEX idx_kv_k_t ON kv(k,t DESC);")
+    con.execute(f'PRAGMA busy_timeout={1e9}'); return type('', (), dict(
+        __call__=lambda _, q, *p: list(con.execute(q, p)),
+        __setitem__=lambda sql, k, v: sql('INSERT INTO kv(k,v) VALUES(?,?)', k, v),
+        __getitem__=lambda sql, k: v[0][0] if (v := 
+            sql('SELECT v FROM kv WHERE k=? ORDER BY t DESC LIMIT 1', k)) else None,
+        __contains__=lambda sql, k: bool(sql('SELECT 1 FROM kv WHRE k=?', k)),
+        __len__=lambda sql: sql('SELECT COUNT(*) FROM kv')[0][0],
+        __eq__=lambda sql, query: sql('SELECT * FROM kv WHERE k LIKE ?', query),
+        __ne__=lambda sql, query: sql('SELECT * FROM kv WHERE k NOT LIKE ?', query),
+        __delitem__=lambda sql, rows: [
+            sql('DELETE FROM kv WHERE k=? AND v=? AND t=?', *row) for row in rows],
+    ))()
 sql = SQL()
 ```