如何将python列表插入Postgres表 [英] How to insert a python list into Postgres table

问题描述

我正在尝试确定将python列表中的数据插入PostgreSQL表的最简单方法。

I am trying to determine the simplest way to insert data from a python list into a PostgreSQL table.

我的PostgreSQL表创建如下；

My PostgreSQL table was created as follows;

CREATE TABLE results(Id serial primary key, T0 timestamp, T1 real, T2 real, T3 real, T4 real, Total real, Result text);

我的python列表格式如下；

My python list is formatted as follows;

ResultsList = ['2015-07-20 16:06:05', 0.16, 5.22, 5.81, 0.69, 11.90, 'OK']

我正在使用以下python代码将列表写入结果表；

I am using the following python code to write the list into the results table;

import psycopg2 as dbapi
con = dbapi.connect(database='xxx', user='xxx')
cur = con.cursor()
cur.execute("INSERT into results VALUES (%s);", (ResultsList),)
con.commit()

解释器吐出以下错误；

The interpreter spits out the following error;

Error not all arguments converted during string formatting
Process finished with exit code 0

任何线索都会受到赞赏。

Any clues would be appreciated.

谢谢：）

推荐答案

按 ResultList 已经是一个序列，您无需尝试将其转换为元组。您真正需要的是在SQL语句中指定正确的值量：

As ResultList is already a sequence, you do not need to try and convert it to a tuple. What you really need is specify the right amount of values in your SQL statement:

cur.execute("INSERT into results(T0, T1, T2, T3, T4, Total, Result) VALUES (%s, %s, %s, %s, %s, %s, %s)", ResultList)

有关它的更多信息，请阅读文档。

For more about it, read the docs.

这篇关于如何将python列表插入Postgres表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！