Update sqlite3/README.md

sqlite3/README.md

@@ -13,8 +13,7 @@ class DB(sqlite3.Connection):
             ''')
 
     def __setitem__(self, key, value):
-        if not isinstance(value, bytes):
-            value = json.dumps(value)
+        if not isinstance(value, bytes): value = json.dumps(value)
         with self:
             cur = self.execute('''
                 INSERT OR REPLACE INTO kv_store
@@ -31,28 +30,29 @@ class DB(sqlite3.Connection):
         if result:
             if isinstance(result[0], str):
                 try: return json.loads(result[0])
-                except: pass
+                except json.JSONDecodeError: pass
             return result[0]
 
     def delete(self, key):
         with self:
             cur = self.execute('''
-                DELETE FROM kv_store WHERE key = ?
+                DELETE FROM kv_store 
+                WHERE key = ?
             ''', (key,))
             return {"deleted_count": cur.rowcount}
 
-
     def keys(self, pattern='*'):
         pattern = pattern.translate(str.maketrans({
             '\\': '\\\\', '%': '\\%', '_': '\\_', '*': '%', '?': '_'
         }))
-
         with self:
-            cur = self.execute('''
+            result = self.execute('''
                 SELECT key FROM kv_store
                 WHERE key LIKE ? ESCAPE '\\'
-            ''', (pattern,))
-            return [row[0] for row in cur.fetchall()]
+            ''', (pattern,)).fetchall()
+        return [row[0] for row in result]
+
+    def __repr__(self): return repr(self.keys())
 ```
 # Usage
 ```python