python问题求教：Cannot operate on a closed cursor。

• Z时代
• 2024-01-10
• 分类：技术分享

写了一个简单的数据库查询方法，在下边想要调用时，报错：sqlite3.ProgrammingError: Cannot operate on a closed cursor.

方法

def select_data():
    conn = sqlite3.connect(dbpath)
    cur = conn.cursor()
    sql = "select VC_FUNDCODE from data_ds limit 100;"
    fund_list = cur.execute(sql)
    cur.close()
    conn.close()
    return fund_list

调用

fund_list = select_data()
datalist = []
for item in fund_list:
    datalist.append(item)
print(datalist)

返回

Traceback (most recent call last):
File "/Users/chinalife/Desktop/source/flaskTiantian/database.py", line 70, in <module>
for item in fund_list:
sqlite3.ProgrammingError: Cannot operate on a closed cursor.

回答：

因为你已经调用close关闭了数据库连接

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