Update README.md

README.md

@@ -1,26 +1,27 @@
-## sqlite3 [25-02-23]
+## sqlite3 [25-03-17]
 ```py
-from tqdm.auto import tqdm, trange; import json
-Soup = lambda html: __import__('bs4').BeautifulSoup(html, 'lxml')
-for i,c in enumerate('RGYB'):globals()[c]=lambda s,i=i:f'\x1b[{91+i}m{s}\x1b[0m'
-def SQL(db='.db'):
-    import sqlite3, os, json; (not os.path.exists(db) and os.makedirs(db) is None,
-        (con := sqlite3.connect(f'{db}/sql', isolation_level=None)).execute(
-        "PRAGMA busy_timeout="f'{1e9}'))[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);")
-    return (sql := type('', (), dict(__call__=lambda _, q, *p: [*con.execute(q, p)],
-        __setitem__=lambda _, k, v: sql("INSERT INTO kv(k,v) VALUES(?,?)", 
-            k, v if type(v) is bytes else json.dumps(v)),
-        __getitem__=lambda _, k: (json.loads(v) if type(v := v[0][0]) is str else v) if
-            (v := sql("SELECT v FROM kv WHERE k=? ORDER BY t DESC LIMIT 1", k)) else None,
-        __eq__=lambda _, query: sql("SELECT * FROM kv WHERE k LIKE ?", query),
-        __ne__=lambda _, query: sql("SELECT * FROM kv WHERE k NOT LIKE ?", query),
-        __delitem__=lambda _, rows: [
-            sql("DELETE FROM kv WHERE k=? AND v=? AND t=?", *row) for row in rows],
-        __contains__=lambda _, k: bool(sql("SELECT 1 FROM kv WHERE k=?", k)),
-        __len__=lambda _: sql("SELECT COUNT(*) FROM kv")[0][0],
-        __iter__=lambda _: iter(k[0] for k in sql("SELECT k FROM kv"))))())
+class SQL:
+    def __init__(sql, db='.db'):
+        import sqlite3, os; sql.db = db
+        if not os.path.exists(db): os.makedirs(db); SQL().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 := sqlite3.connect(f'{db}/sql', check_same_thread=False,
+        isolation_level=None)).execute("PRAGMA busy_timeout="f'{1e9}'); sql.con = con
+    def __call__(sql, q, *p): return [*sql.con.execute(q, p)]
+    def __setitem__(sql, k, v): return sql("INSERT INTO kv(k,v) VALUES(?,?)",
+        k, v if type(v) is bytes else __import__('json').dumps(v, ensure_ascii=False))
+    def __getitem__(sql, k):
+        if (v := sql("SELECT v FROM kv WHERE k=? ORDER BY t DESC LIMIT 1", k)):
+            return __import__('json').loads(v) if type(v := v[0][0]) is str else v
+    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 __delitem__(sql, rows):
+        for row in rows: sql("DELETE FROM kv WHERE k=? AND v=? AND t=?", *row)
+    def __contains__(sql, k): return bool(sql("SELECT 1 FROM kv WHERE k=?", k))
+    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()
 ```