Update sqlite3-python/README.md

sqlite3-python/README.md

@@ -12,11 +12,12 @@ sql("SELECT * FROM sqlite_master WHERE type = 'table'")
 ```python
 def SQL():
     import sqlite3, hashlib, os
-    sql = lambda q, *p, con=sqlite3.connect('.db'): list(con.execute(q, p))
-    if not os.path.exists('.db-blob') and (os.mkdir('.db-blob') or True):
-        list(map(sql, ['PRAGMA journal_mode=WAL',
-            'CREATE TABLE kv(k TEXT, v BLOB, t TIMESTAMP 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('.db', isolation_level=None)
+    sql = lambda q, *p: list(con.execute(q, p))
+    if not os.path.exists('.db-blob') and os.mkdir('.db-blob') is None:
+        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)''')
     def setitem(_, filename, blob):
         if not sql('SELECT 1 FROM kv WHERE v=?', sha1 := hashlib.sha1(blob).hexdigest()):
             with open(f'.db-blob/{sha1}', 'xb') as f: f.write(blob)
@@ -30,6 +31,7 @@ sql = SQL()
 print(sql['hello']) # None
 sql['hello'] = b'world'
 print(sql['hello']) # b'world'
+print(sql['hello']) # b'world'
 ```
 
 # Dict-like