Question

Python = Python 3.7.3
Pandas ='0.24.2'
OS = MacOS Mojave 10.14

我想将数据帧附加到mysql表。以下代码给出了错误：DatabaseError: Execution failed on sql 'SELECT name FROM sqlite_master WHERE type='table' AND name=?;': not all arguments converted during string formatting

代码：

import pandas as pd
import pymysql
from datetime import date
from datetime import datetime
from dateutil.relativedelta import relativedelta
from time import sleep

now = str(datetime.now())[:19]

# APPEND TO DB TABLE

print('Started at {}'.format(now))

dates = pd.date_range(start='2018-01-02', end='2018-01-11')
for date in dates:
    print('Appending {} to {}...'.format(date, date+relativedelta(days=1)))
    conn = pymysql.connect('host','user', 'pass', 'db')
    query='''select ... '''.format(date, date+relativedelta(days=1))
    df = pd.read_sql(query, conn)
    df.index.name = 'id'
    df.to_sql('table_name', con=conn, if_exists='append')
    print('-> DONE')
    sleep(3)

print('Finished appending at {}'.format(now))

如何避免此错误，并使用pymysql附加数据框。我已经尝试了sqlalchemy，但是却得到了ModuleError: MySQLdb module not found的帮助。我还尝试了brew install MySQL然后失败的pip install mysqlclient，然后又失败了的$ sudo apt-get install python3.7-dev libmysqlclient-dev，因为apt-get不是我的bash终端中的命令...

任何帮助将不胜感激

Python 3.7 to_sql数据库错误：在SQL上执行失败

0 个答案: