Update README.md

README.md

@@ -7,7 +7,7 @@ class SQL:
             "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 := sqlite3.connect(f'{db}/sql', check_same_thread=False,
-            isolation_level=None)).execute("PRAGMA busy_timeout="f'{1e9}'); sql.con = con
+            isolation_level=None)).execute(f"PRAGMA busy_timeout={1e9}"); sql.con = con
     def __call__(sql, q, *p): return [*sql.con.execute(q, p)]
     def __setitem__(sql, k, v): import json; return sql("INSERT INTO kv(k,v) VALUES(?,?)",
         k, v if type(v) is bytes else json.dumps(v, ensure_ascii=False))
@@ -19,8 +19,6 @@ class SQL:
     def __contains__(sql, k): return bool(sql("SELECT 1 FROM kv WHERE k=?", k))
     def __eq__(sql, query): return sql("SELECT * FROM kv WHERE k LIKE ?", query)
     def __ne__(sql, query): return sql("SELECT * FROM kv WHERE k NOT LIKE ?", query)
-    def __len__(sql): return sql("SELECT COUNT(*) FROM kv")[0][0]
-    def __iter__(sql): return iter(k[0] for k in sql("SELECT k FROM kv"))
     def __repr__(sql): return f"SQL(db={sql.db})"
 sql = SQL()
 ```