创建一个python脚本，该脚本使用mysql数据库中的结构和数据文件创建sql转储

Question

I want to make a backup script in python that make a .sql file with structure and data, and saves it on the disk?

The issue is that i wanna make a routine for a backup remotely, so the file will be stored in a different server.. To make sure that if my server dies, the data does not die with it.

Is it possible?

Answer 1

I don't see why you want to do that in Python since there is already a command for that: mysqldump . If you specify it with:

mysqldump -u username -p database

It will query for your password and then write the SQL statements to the stdout.

You can use I/O redirection to write it to a file, like:

mysqldump -u username -p database > file.sql

Since SQL is a quite verbose language, you can also construct a zipped file, by passing the output through the gzip compressor:

mysqldump -u username -p database | gzip --best > file.sql.gz

If you want to "write" a program in Python that does the calls itself, you can do it with subprocess :

import subprocess

username = 'the_username'
password = 'the_password'
database = 'my_fancy_database'

with open('file.sql','w') as output:
    c = subprocess.Popen(['mysqldump', '-u',username,'-p%s'%password,database],
                         stdout=output, shell=True)

But this is only some logic around the mysqldump command.