to_sql报错 在字符串格式化过程中未转换所有参数

报错：

DatabaseError: Execution failed on sql 'SELECT name FROM sqlite_master WHERE type='table' AND name=?;': not all arguments converted during string formattingb

报错的代码如下：

import pymysql
import pandas as pd
con = pymysql.connect(host='localhost',user='root',password='pass',db='mydatabase',charset='utf8')

path = 'test.csv'
df = pd.read_csv(path,encoding='GBK')
df.to_sql(name='test',con=con)

to_sql 报错信息截图如下：

解决方法如下：

使用sqlalchemy 连接数据库。

import pymysql
import pandas as pd
from sqlalchemy import create_engine

con = create_engine('mysql+pymysql://root:pass@localhost:3306/mydatabase?charset=utf8')  
pd.read_sql(sql,con)    
path = 'test.csv'
df = pd.read_csv(path,encoding='GBK')
df.to_sql(name='test',con=con)