mycursor = mydb.cursor(buffered=True) except mysql.connector.Error as q: print("["+datetime.datetime.now().strftime("%a %b %d, %Y %I:%M:%S %p")+"] Database Error: "+str(q)+"\n") def disconnect_database(): global mydb global mycursor try: if mydb.is_connected()...
self.conn = connect_to_database() return self.conn.cursor() def __exit__(self, exc_type, exc_val, exc_tb): self.conn.commit() self.conn.close() with DatabaseConnection() as db_cursor: db_cursor.execute(sql_query) # 在此范围内无论是否出现异常,数据库连接都能被妥善关闭3.4 链式异常...
importsqlite3# 连接到SQLite数据库(假设有一个名为 example.db 的数据库)conn=sqlite3.connect('example.db')# 创建一个游标对象cursor=conn.cursor()# 执行SQL查询语句cursor.execute("SELECT * FROM users")# 检索所有行rows=cursor.fetchall()# 打印每一行forrowinrows:print(row)# 关闭连接conn.close()...
4、修改数据(更新) f = cursor.execute("update tb1 set age='28' where id=3") print(f) 运行结果: /usr/bin/python3.5...("select * from tb1") print(f,cursor.fetchall()) 运行结果 : ...
``` # Python script to execute SQL queries on a database import sqlite3 def execute_query(connection, query): cursor = connection.cursor() cursor.execute(query) result = cursor.fetchall() return result ``` 说明: 此Python脚本是在数据库上执行SQL查询的通用函数。您可以将查询作为参数与数据库连...
5. 'DictCursor' object has no attribute 'commit' 6. SyntaxError: positional argument follows keyword argument 7. TypeError: func() got multiple values for argument 'a1' 8. TypeError: Object of type set is not JSON serializable 9. TypeError: list indices must be integers or slices, not tupl...
deffiles(request):ifrequest.GET.get('url'):url = request.GET.get('url')File.objects.create(filename=url)returnHttpResponse('保存成功')else:filename = File.objects.get(pk=23).filenamecur = connection.cursor()cur.execute("""select * from code_audit_file where filename='%s'"""%(file...
cursor.execute('SHOW TABLES') 二、clickhouse_sqlalchemy连接方式 使用较复杂,推荐使用上述两种,注意使用端口为http端口8123。 fromclickhouse_sqlalchemyimportmake_sessionfromsqlalchemyimportcreate_engineimportpandas as pd conf={"user":"xxx","password":"xxx","server_host":"xx.xxx.xx.xxx","port":"8123...
i])TypeError: 'int'objectisnotsubscriptable# （3） try语句代码块未发生异常>>>testfinally('梯阅线条',1)阅执行else阅执行finally执行与try复合语句有相同缩进的代码块# （4） except或else处理器中发生或未发生新的异常；>>>testfinally([1,2,3],1)2执行finallyTraceback (mostrecentcalllast):...
```# Python script to connect to a database and execute queriesimport sqlite3def connect_to_database(database_path):connection = sqlite3.connect(database_path)return connectiondef execute_query(connection, query):cursor = connection...