everyone I am new to python and I want to connect MySQL database with python 3 script. I did some googling but couldn't find anything for python 3 although there are methods for earlier python releases. Could anyone suggest a method?
MySQL-Connector, oursql and PyMySQL all support Python 3. They are also all supported by SQLAlchemy, which also supports Python 3.
So most likely you's want to use SQLAlchemy + one of the above conectors.
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I'm very new to MySQL.
My question is about installation of MySQL on my Mac (Mojave OS) to learn and practice it to later use it with node.js.
First I got it with Homebrew, but then I wasn't able to use it with the Workbench - I set up the password for root user but I didn't find any commands list to work with it since it refused to do any operations with it in workbench and I didn't find any command.
Then I downloaded Community Server - I have a server through system prefs, but I don't have a command line interface - which I need for writing queries.
After that I downloaded MySQL Shell. But as far as I researched I found that is it not standard CLI (found it here https://stackoverflow.com/questions/58367813/how-to-uninstall-mysql-shell-on-macos).
My question is next.
As an example, when I started learning MongoDB I had MongoDB Compass and MongoDB Shell - one helped me to work with commands, the other one helped to see results visually.
MySQL has a language which I want to learn and practice with (SELECT, USE etc.). How can I do the same what I did with MongoDB but in the case of MySQL? What should I install, and why Homebrew MySQL version is different than any other MySQL version (even commands - such as mysql.server start) and there is no documentation for it in MySQL docs?
Unfortunately, there's no such nice installer for macOS as there is for Windows. Instead you have to install the different parts individually.
For the type of work you plan to do I recommend to install at least 2 pieces:
The MySQL server, which holds your data. On macOS this comes with a preferences pane, which you can use do some basic management of the server (start/stop, directory settings).
MySQL Workbench, a visual design, query and management tool. That will give you GUI support for your DB work.
The server also comes with the classic shell, which you can launch by running mysql in a terminal. That's sometimes quicker for simple work, compared to launching a full GUI.
A better command line tool is the MySQL Shell, a new and highly improved variant of the classic shell, which will eventually replace the old classic shell entirely in the future. So it's certainly no mistake to install that too.
I hope that clarifies which pieces are required to start working with MySQL.
I can import csv to mysql using Sequel pro with no problem. Need to do it in my python program. Couldn't find the answer online. Looks like mysqldb is not a good match for python ver 3. Using Mypysql can't find any note in documentation if it has this functionality.
OS: Mac
I am completely new to python and I want to start working with database in python. I am using winPython version 3.4. I am using pymysql module. At very beginning of the project, I had used the code below and faced the error.
import pymysql as sql
db = sql.connect('localhost','root','','test.db')
Error ==> No connection could be made because the target machine actively refused it.
I guess the reason is because I have made no database. Actually I don’t know how.where do I have to build the database? Do I have to install a sql server and build a data base there? If so what is the best match for winpython 3.4? How can I have graphical interface to my DB management to be able to build tables , insert rows or other things?
thank you for helping me to start.
I've Kallithea running on my own server with sqlite database. I would like to move all this data to MySQL database instead. On default Kallithea uses sqlite if not any other database is specified. From Kallithea documentation pdf https://media.readthedocs.org/pdf/kallithea/latest/kallithea.pdf they recommend to use https://github.com/shazow/sqlalchemygrate to migrate data from database to another.
I'm installed sqlalchemygrate using Python pip but when I try to migrate there is parts what I don't understand at all. Help menu doesn't not clearly specify how to use migrate command. At least I don't understand it at all. For example when I try to type
grate migrate "sqlite:./kallithea.db" "mysql://kallithea#localhost/kallithea"
I get error saying
ImportError: No module named sqlite
In help menu it says to use
migrate METADATA ENGINE_FROM ENGINE_TO
Migrate schema or data from one engine to another.
And example how to use it
grate migrate model.meta:metadata \
"mysql://foo:bar#localhost/baz" "sqlite:///:memory:" \
What I don't really understand is what is that metadata it needs? And how to specify sqlite .db file for this. And how to migrate data to new kallithea database in mysql with user kallithea which has all privileges to that database.
Not sure about Kallithea but RhodeCode users had a great success using TAPS (https://github.com/ricardochimal/taps) project to migrate they databases to different format.
ImportError: No module named sqlite
You probably need to install sqlite, and pip install sqlite or similar.
Regarding what metadata it needs, it's referring to metadata in the context of SQLAlchemy: http://docs.sqlalchemy.org/en/latest/core/metadata.html
I'm starting to get a bit desperate in my attempts to get a ruby script to connect to MySQL.
I've given up on DBI, as I just don't seem to be able to get it to work no matter what I do. I figured I might have more luck with just using mysql.rb from ruby-mysql. However, in using that I get the following error:
./mysql.rb:453:in `read': Client does not support authentication protocol requested by server; consider upgrading MySQL client (Mysql::Error)
I gather from googling that error message that this means my version of MySQL is too recent and doesn't support old-style passwords. I'm on a shared server and don't have root access, so I can't make the changes recommended to the MySQL config.
My version, btw, is:
mysql Ver 14.7 Distrib 4.1.22, for pc-linux-gnu (i686) using readline 4.3
Has anyone succeeded in getting ruby to connect to MySQL? I've been trying under Windows, since I have admin access on my Windows machine, but if there's a way to do it without root access on Linux, that'd be even better.
Sounds like you've run in to a MySQL quirk. Some time around version 5.0 they changed the format of connect passwords. It's an easy fix, though: http://dev.mysql.com/doc/refman/5.1/en/old-client.html
(Also, check out the Ruby Sequel gem, it lets you do some real fun stuff with all sorts of databases and without the overhead of ActiveRecord: http://sequel.rubyforge.org/documentation.html )
There is a good summary of how to do this here: http://rubylearning.com/satishtalim/ruby_activerecord_and_mysql.html
I haven't had any issues with connecting to MySQL from Ruby on my test machines.
You mention that you're using a shared hosting provider. If they have that old of a ruby-mysql version that it's not compatible with the new style passwords, perhaps their support staff can make the changes you need made to the user row(s) in MySQL.
What are you looking to do? I think it is possible to use the ActiveRecord component of Rails to establish a connection to MySQL. I'll see if i can find some documentation to back this up, and i'll update this answer.
link to ActiveRecord/MySQL integration
Update: to use ActiveRecord for the purpose are looking for, you will need to create the various model classes that represent the tables you are pulling data from, and specify their relationships. Once that is done, you will be able to do something like:
SomeModel.find(:all, :conditions => ['some_column = ?', some_value]
I've used this approach in the past to provide my Rails apps with access to WordPress data.
It may be that you're using an older version of mysql and need to upgrade it.