Develop Reference

Problem upgrading Sqlite3 version on CentOS for Python

I have CentOS 6 on my system and I'm trying to update SQLite for Python. I've installed it from source and executing sqlite --version returns version 3.33.0 as expected.
However, when I try to check the python SQLite version using import sqlite3; sqlite3.sqlite_version; I still get the previous SQLite version 3.6.20.
Software Locations:
Python 3.6.9 - /usr/bin/python3
Sqlite3 - /usr/bin/sqlite3
I've tried the solution here, this does not work at all, after updating LD_LIBRARY_PATH and checking the python SQLite version it still gives '3.6.20', and here, when I try sudo LD_RUN_PATH=, it gives me the error No such file or directory, but when I execute it without sudo LD_RUN_PATH=, it successfully compiles but still gives me SQLite '3.6.20' (Compiled python without uninstalling).
Note: I have multiple python3 versions.
What can I do to resolve this?

When I did it (specifically trying to find a way to update sqlite3 for a running python program; did not work...), I compiled sqlite and got libsqlite3.so.0.8.6, and then replaced the system-wide sqlite3 with that. For me on debian, that was in /usr/lib/x86_64-linux-gnu. I did see (though now I can't find where) that this way may cause issues when updating in the future. It did update python's sqlite3 for me though.

You can import specific versions:
__requires__= 'sqlite3==3.6.20'
import pkg_resources
pkg_resources.require("sqlite3==3.6.20")
import sqlite
Note that this only works on the first import. If sqlite gets imported before pkg_resources, it will take the latest version.

Using pytds with sqlalchemy

I am trying to connect to an SQL Server from a version of python (pythonista) that requires that I use pure python drivers. I am able to connect using pytds if I don't use sqlalchemy so I know this works.
However, I would like to be able to use sqlalchemy so I installed sqlaclhemy-pytds but when I try:
engine = create_engine('mssql+pytds://' +various params)
I get:
Can't load plugin:
sqlalchemy.dialects:mmsql.pytds
What am I overlooking?

I finally got it working by adding:
https://github.com/m32/sqlalchemy-tds.git
I thought I got that when I did:
pip install sqlalchemy-pytds
pip install python-tds
especially since the pip list showed
python-tds (1.9.1) - Python DBAPI driver for MSSQL using pure Python TDS (Tabular Data Stream) protocol implementation
but apparently the sqlalchemy MSSQL dialect is different and is not available via pip and must be imported as sqlalchemy_tds
Thanks to everyone who replied.

According to the SQLAlchemy dialects page it looks like you'll need to use the external dialect here:
https://github.com/m32/sqlalchemy-tds

How to use/install rtree in sqlite3 module in python 2.7 on windows

I'm trying to use spatialite database with my django project that is using contrib.gis application (GeoDjango). When syncing database django gives an error "no such module: rtree". Apparently the sqlite3 module that ships with python 2.7.3 doesn't support rtree in sqlite database.
How this can be fixed?

You need to build sqlite with the
SQLITE_ENABLE_RTREE
flag set. How you do that depends on your environment, but typically adding something like:
-DSQLITE_ENABLE_RTREE=1
to your compiler flags will usually be enough.

looks like you need to install a spatial backend such as spatiallite see https://pypi.python.org/pypi/pyspatialite

Accessing a MySQL database from python

I have been trying for the past several hours to find a working method of accessing a mysql database in python. The only thing that I've managed to get to compile and install is pyodbc but the necessary driver is not available for ppc leopard.
I already know about this.
UPDATE:
I've gotten setuptools to install, but now MySQL-python won't build.
UPDATE:
Now I've gotten sqlalchemy to install but while it will show up when called by the command line it won't import when used in my cgi script.

Try SQL Alchemy.
It is awesome.

Install fink. It includes the MySQLdb package.

UPDATE: Now I've gotten sqlalchemy to
install but while it will show up when
called by the command line it won't
import when used in my cgi script.
Can you verify that the Python being invoked from your CGI script is the same as the one you get when you run Python interactively? Check which python and compare it to your webserver CGI settings. That's the only thing I can think of that would cause this - getting it installed in one Python but not the other.
What OS are you on? If you're on something like Ubuntu, sudo apt-get install python-mysqldb is much more reliable than trying to build it yourself.
Also, unless I'm mistaken, SQLAlchemy won't actually help you make the connection itself if you don't have a DB-API2 module (like python-mysqldb) installed - SQLAlchemy sits at the next level up, using the DB-API2 connection and making access to it more Pythonic.

Python and MySQL

I can get Python to work with Postgresql but I cannot get it to work with MySQL. The main problem is that on the shared hosting account I have I do not have the ability to install things such as Django or PySQL, I generally fail when installing them on my computer so maybe it's good I can't install on the host.
I found bpgsql really good because it does not require an install, it's a single file that I can look at, read and then call the functions of. Does anybody know of something like this for MySQL?

MySQLdb is what I have used before.
If you host is using Python version 2.5 or higher, support for sqlite3 databases is built in (sqlite allows you to have a relational database that is simply a file in your filesystem). But buyer beware, sqlite is not suited for production, so it may depend what you are trying to do with it.
Another option may be to call your host and complain, or change hosts. Honestly these days, any self respecting web host that supports python and mysql ought to have MySQLdb pre installed.

I don't have any experience with http://www.SiteGround.com as a web host personally.
This is just a guess, but it's common for a shared host to support Python and MySQL with the MySQLdb module (e.g., GoDaddy does this). Try the following CGI script to see if MySQLdb is installed.
#!/usr/bin/python
module_name = 'MySQLdb'
head = '''Content-Type: text/html
%s is ''' % module_name
try:
__import__(module_name)
print head + 'installed'
except ImportError:
print head + 'not installed'

I uploaded it and got an internal error
Premature end of script headers
After much playing around, I found that if I had
import cgi
import cgitb; cgitb.enable()
import MySQLdb
It would give me a much more useful answer and say that it was not installed, you can see it yourself -> http://woarl.com/db.py
Oddly enough, this would produce an error
import MySQLdb
import cgi
import cgitb; cgitb.enable()
I looked at some of the other files I had up there and it seems that library was one of the ones I had already tried.

You could try setting up your own python installation using Virtual Python. Check out how to setup Django using it here. That was written a long time ago, but it shows how I got MySQLdb setup without having root access or anything like it. Once you've got the basics going, you can install any python library you want.

You really want MySQLdb for any MySQL + Python code. However, you shouldn't need root access or anything to use it. You can build/install it in a user directory (~/lib/python2.x/site-packages), and just add that to your PYTHON_PATH env variable. This should work for just about any python library.
Give it a shot, there really isn't a good alternative.

Take a pick at
https://docs.djangoproject.com/en/1.8/ref/databases/
MySQLdb is mostly used driver, but if you are using python3 and django 1.8.x that will not work, then you should use mysqlclient that is a folk of MySQLdb on the following link
https://pypi.python.org/pypi/mysqlclient