ci: make ci happy lint the code, delete unused imports

Signed-off-by: yihong0618 <zouzou0208@gmail.com>

pilot/connections/mysql.py

@@ -3,27 +3,27 @@
 
 import pymysql
 
-class MySQLOperator:
-    """Connect MySQL Database fetch MetaData For LLM Prompt 
-        Args:
 
-        Usage:
+class MySQLOperator:
+    """Connect MySQL Database fetch MetaData For LLM Prompt
+    Args:
+
+    Usage:
     """
 
     default_db = ["information_schema", "performance_schema", "sys", "mysql"]
+
     def __init__(self, user, password, host="localhost", port=3306) -> None:
-        
         self.conn = pymysql.connect(
             host=host,
             user=user,
             port=port,
             passwd=password,
             charset="utf8mb4",
-            cursorclass=pymysql.cursors.DictCursor
+            cursorclass=pymysql.cursors.DictCursor,
         )
 
     def get_schema(self, schema_name):
-        
         with self.conn.cursor() as cursor:
             _sql = f"""
                 select concat(table_name, "(" , group_concat(column_name), ")") as schema_info from information_schema.COLUMNS where table_schema="{schema_name}" group by TABLE_NAME;
@@ -31,7 +31,7 @@ class MySQLOperator:
             cursor.execute(_sql)
             results = cursor.fetchall()
             return results
-    
+
     def get_index(self, schema_name):
         pass
 
@@ -43,10 +43,10 @@ class MySQLOperator:
             cursor.execute(_sql)
             results = cursor.fetchall()
 
-            dbs = [d["Database"] for d in results if d["Database"] not in self.default_db]
+            dbs = [
+                d["Database"] for d in results if d["Database"] not in self.default_db
+            ]
             return dbs
 
     def get_meta(self, schema_name):
         pass
-
-