I have seen lots of similar questions on stackoverflow, but while all of them advice switching to other packages that support python 3.
The issue is following: the project that I have to run on python3 uses mysql package, which appears to be a "virtual package" (whatever that means) and actually installs MySQL-python package, which is not an easy task - if at all possible.
So, is there a way to install MySQL-python on python3?
No, but if you're looking to interface with mysql in python 3, just use mysqlclient. Its a pure python interface to mysql, and I use it myself in production. Libraries like sqlalchemy also support it.
My various searches seem to come up with very old posts or a mention of how to do this under cygwin. I had python 3.5 installed and then installed Anaconda3. I have python 3.5 (Cpython) installed in my user directory. I tried changing the order of how things appear in my Windows Environment Variables path, so that I could try both the Anaconda version of Python and the other version of python that I have.
Currently, I am a bit confused as to the package name that I should use. Is it python-mysqldb, or MySQLdb, or mysqldb, mysqlclient. I believe that when I had Anaconda3 in my global path (and the other version of python in my user path), I was able to install mysqlclient.
Initially, I am just trying to follow a tutorial from a training site that covers databases and uses peewee.
So, can the mysql driver for peewee be installed for python3? Or on Windows specifically?
It is easy enough to use sqlite3, one doesn't use that in production, is that right?
Can someone help me? Provide some guidance?
Also, one source of confusion is when other forms of installation of a python package are listed in the google results (many point to stack overflow), such as using easy_install, or cloning something from git. When I see instructions that are from 2010 and they reference easy_install, I had been thinking that now we can just use pip instead? Also, sometimes I see use of the conda command. Does that work the same as pip?
Thanks in advance,
Bruce
You could use pymysql. "The goal of PyMySQL is to be a drop-in replacement for MySQLdb". Check the docs here. Install the following libraries
pip install mysqlclient pymysql
Once these libraries are installed, just add the lines in the manage.py file in your project and use the database settings for mysql.
import pymysql
pymysql.install_as_MySQLdb()
Now any files that import MySQLdb will work.
I'm calling on psycopg2 with
import psycopg2
I get the std error
ImportError: No module named psycopg2
I installed my copy with macports, so I'm curious why it wouldn't work because all of the dependencies should be downloaded as well.
I don't have any experience with Postgresql, nor this module, so I don't know what could be going wrong. Fact is, another project I'm trying to get built calls upon it, so if I could avoid using this I would. :)
I'm sure that postgresql is installed, but that has little to do with the fact that my installation can't find psycopg2. Any suggestinos would be appreciated.
$ which python
reveals
/Library/Frameworks/Python.framework/Versions/Current/bin/python
and
$ python --version
reveals
Python 2.7.3 -- EPD_free 7.3-2 (32-bit)
I don't necessarily want the version of EPD_free, but I had to install it for (somewhat) unrelated reasons.
MacPorts installs its own version of Python alongside Apple's version. You can manage the active version of Python (the one that gets run when you type in python at the command line or by /usr/bin/env) by using the port select command. See this question.
What is the correct way to install and update Python packages on OS X Mountain Lion, using Apple's built in Python?
I've tried all everything I can find here and in the documentation for various packages but keep encountering all kinds of errors that result in failed or aborted installations or updates. Notably, with pip I frequently get errors like
RuntimeError: maximum recursion depth exceeded in cmp
or
SError: [Errno 24] Too many open files: '/Library/Python/2.7/site-packages'
and some commands pip commands (like list) just don't seem to exist at all.
I have an uptodate version of pip that works fine with some packages, and have the latest Xcode command line tools installed.
The only thing that seems to work — and it works all the time — is
python setup.py install
Is this the correct way to maintain and install python packages on Lion? Is there any reason not to use this method as my primary method for keeping packages uptodate? Should pip be working for me, or does it not work with Apple's Python?
UPDATE: I spoke too soon. I also have problems with
python setup.py install
Occasionally (often) I'll get:
error: /Library/Python/2.7/site-packages: Too many open files
When nothing is running in a fresh Terminal, I get about 50 when I
lsof | grep python | wc -l
and if I quit Dropbox, which seems to be the source of these, and reduce the number to 0, I still get "Too many open files" for most package installation operations, with whatever tool I use, even after a reboot of my system.
Why am I getting a "too many open files" error so often?
You should be able to maintain exactly as you're doing, but likely need to update your PYTHONPATH to somewhere outside of /Library, hence the reason everyone else is mentioning that and/or using homebrew to install python.
I install python packages with pip and maintain them using:
https://github.com/nvie/pip-tools
First of all, download and install the full Python from the python website.
Then use pip (or homebrew). The built-in python is incomplete in many respects, including mainly, the ability to install new packages. I faced similar problems when I fist got my MacBookPro and installing the full python on top of the built-in one solved all my troubles
Why use Apple's built-in Python? It's incomplete, I think.
I'm using Homebrew and brew install python works fine for me.
From https://github.com/mxcl/homebrew/wiki/Homebrew-and-Python:
We recommend to brew install python because:
Comes with pip (and distribute)
Python (distutils) finds brewed
software (includes, libs), knows about the compiler and flags even if
the command line tools for Xcode are not installed.
No need to set the PYTHONPATH for Homebrew bindings.
No need to work-around the sudo-is-needed-for-easy_install issue
I am finding it difficult to use MySQL with Python in my windows system.
I am currently using Python 2.6. I have tried to compile MySQL-python-1.2.3b1 (which is supposed to work for Python 2.6 ?) source code using the provided setup scripts. The setup script runs and it doesn't report any error but it doesn't generate _mysql module.
I have also tried setting up MySQL for Python 2.5 with out success. The problem with using 2.5 is that Python 2.5 is compiled with visual studio 2003 (I installed it using the provided binaries). I have visual studio 2005 on my windows system. Hence setuptools fails to generate _mysql module.
Any help ?
Download page for python-mysqldb. The page includes binaries for 32 and 64 bit versions of for Python 2.5, 2.6 and 2.7.
There's also discussion on getting rid of the deprecation warning.
UPDATE: This is an old answer. Currently, I would recommend using PyMySQL. It's pure python, so it supports all OSes equally, it's almost a drop-in replacement for mysqldb, and it also works with python 3. The best way to install it is using pip. You can install it from here (more instructions here), and then run:
pip install pymysql
This may read like your grandpa givin advice, but all answers here did not mention the best way: go nd install ActivePython instead of python.org windows binaries. I was really wondering for a long time why Python development on windows was such a pita - until I installed activestate python. I am not affiliated with them. It is just the plain truth. Write it on every wall: Python development on Windows = ActiveState!
you then just pypm install mysql-python and everything works smoothly. no compile orgy. no strange errors. no terror. Just start coding and doing real work after five minutes.
This is the only way to go on windows. Really.
As Python newbie learning the Python ecosystem I've just completed this.
Install setuptools instructions
Install MySQL 5.1. Download the 97.6MB MSI from here You can't use the essentials version because it doesnt contain the C libraries.
Be sure to select a custom install, and mark the development tools / libraries for installation as that is not done by default. This is needed to get the C header files.
You can verify you have done this correctly by looking in your install directory for a folder named "include". E.G C:\Program Files\MySQL\MySQL Server 5.1\include. It should have a whole bunch of .h files.
Install Microsoft Visual Studio C++ Express 2008 from here This is needed to get a C compiler.
Open up a command line as administrator (right click on the Cmd shortcut and then "run as administrator". Be sure to open a fresh window after you have installed those things or your path won't be updated and the install will still fail.
From the command prompt:
easy_install -b C:\temp\sometempdir mysql-python
That will fail - which is OK.
Now open site.cfg in your temp directory C:\temp\sometempdir and edit the "registry_key" setting to:
registry_key = SOFTWARE\MySQL AB\MySQL Server 5.1
now CD into your temp dir and:
python setup.py clean
python setup.py install
You should be ready to rock!
Here is a super simple script to start off learning the Python DB API for you - if you need it.
I found a location were one person had successfully built mysql for python2.6, sharing the link, http://www.technicalbard.com/files/MySQL-python-1.2.2.win32-py2.6.exe
...you might see a warning while import MySQLdb which is fine and that won’t hurt anything,
C:\Python26\lib\site-packages\MySQLdb__init__.py:34: DeprecationWarning: the sets module is deprecated
from sets import ImmutableSet
What about pymysql? It's pure Python, and I've used it on Windows with considerable success, bypassing the difficulties of compiling and installing mysql-python.
You're not the only person having problems with Python 2.6 and MySQL (http://blog.contriving.net/2009/03/04/using-python-26-mysql-on-windows-is-nearly-impossible/). Here's an explanation how it should run under Python 2.5 http://i.justrealized.com/2008/04/08/how-to-install-python-and-django-in-windows-vista/
Good luck
The precompiled binaries on http://www.lfd.uci.edu/~gohlke/pythonlibs/#mysql-python is just worked for me.
Open MySQL_python-1.2.5-cp27-none-win_amd64.whl file with zip
extractor program.
Copy the contents to
C:\Python27\Lib\site-packages\
On Python 3.4 I've installed mysqlclient from http://www.lfd.uci.edu/~gohlke/pythonlibs/ with pip install mysqlclient and it's working.
You can try to use myPySQL. It's really easy to use; no compilation for windows, and even if you need to compile it for any reason, you only need Python and Visual C installed (not mysql).
http://code.google.com/p/mypysql/
Good luck
There are Windows binaries for MySQL-Python (2.4 & 2.5) available on Sourceforge. Have you tried those?
Because I am running python in a (pylons/pyramid) virtualenv, I could not run the binary installers (helpfully) linked to previously.
I had problems following the steps with Willie's answer, but I determined that the problem is (probably) that I am running windows 7 x64 install, which puts the registry key for mysql in a slightly different location, specifically in my case (note: I am running version 5.5) in: "HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MySQL AB\MySQL Server 5.5".
HOWEVER, "HKEY_LOCAL_MACHINE\" cannot be included in the path or it will fail.
Also, I had to do a restart between steps 3 and 4.
After working through all of this, IMO it would have been smarter to run the entire python dev environment from cygwin.
If you are looking for Python 3.2 this seems the best solution I found so far
for Python 2.4 - 3.2 PyMySQL
for Python 2.3 - 2.6 MySQL for Python
Source: http://wiki.python.org/moin/MySQL
You might want to also consider making use of Cygwin, it has mysql python libraries in the repository.
You can also use pyodbc with the MySQL Connector/ODBC to use MySQL on Windows. Unixodbc is also available to make the code compatible on Linux. Pyodbc uses the standard Python DB API 2.0 so if you stick with that switching between MySQL/PostgreSQL/SQLite/ODBC/JDBC drivers etc. should be relatively painless.
upvoted itsadok's answer because it led me to the installation for python 2.7 as well, which is located here: http://www.codegood.com/archives/129
Got sick of the installation troubles with MySQLdb and tried pymysql instead.
Easy setup;
git clone https://github.com/petehunt/PyMySQL.git
python setup.py install
And APIs are pretty much the same.