Update README.md
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@@ -7,18 +7,18 @@ class SQL:
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"PRAGMA journal_mode=WAL; CREATE TABLE kv(k,v,t DEFAULT CURRENT_TIMESTAMP);"
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"CREATE INDEX idx_kv_v ON kv(v); CREATE INDEX idx_kv_k_t ON kv(k,t DESC);")
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(con := sqlite3.connect(f'{db}/sql', check_same_thread=False,
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isolation_level=None)).execute("PRAGMA busy_timeout="f'{1e9}'); sql.con = con
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isolation_level=None)).execute("PRAGMA busy_timeout="f'{1e9}'); sql.con = con
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def __call__(sql, q, *p): return [*sql.con.execute(q, p)]
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def __setitem__(sql, k, v): return sql("INSERT INTO kv(k,v) VALUES(?,?)",
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k, v if type(v) is bytes else __import__('json').dumps(v, ensure_ascii=False))
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def __getitem__(sql, k):
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if (v := sql("SELECT v FROM kv WHERE k=? ORDER BY t DESC LIMIT 1", k)):
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return __import__('json').loads(v) if type(v := v[0][0]) is str else v
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def __eq__(sql, query): return sql("SELECT * FROM kv WHERE k LIKE ?", query)
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def __ne__(sql, query): return sql("SELECT * FROM kv WHERE k NOT LIKE ?", query)
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def __delitem__(sql, rows):
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for row in rows: sql("DELETE FROM kv WHERE k=? AND v=? AND t=?", *row)
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def __contains__(sql, k): return bool(sql("SELECT 1 FROM kv WHERE k=?", k))
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def __eq__(sql, query): return sql("SELECT * FROM kv WHERE k LIKE ?", query)
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def __ne__(sql, query): return sql("SELECT * FROM kv WHERE k NOT LIKE ?", query)
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def __len__(sql): return sql("SELECT COUNT(*) FROM kv")[0][0]
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def __iter__(sql): return iter(k[0] for k in sql("SELECT k FROM kv"))
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def __repr__(sql): return f"SQL(db={sql.db})"
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