ImportError: No module named MySQLdb

问题:

I am referring the following tutorial to make a login page for my web application. http://code.tutsplus.com/tutorials/intro-to-flask-signing-in-and-out--net-29982

I am having issue with the database. I am getting an

ImportError: No module named MySQLdb 

when I execute

http://127.0.0.1:5000/testdb 

I have tried all possible ways to install python mysql, the one mentioned in the tutorial, easy_install, sudo apt-get install.

I have installed mysql in my virtual env. My directory structure is just the same as whats explained in the tutorial. The module is sucessfully installed in my system and still I am getting this error.

Please help. What could be causing this.

回答1:

If you're having issues compiling the binary extension, or on a platform where you cant, you can try using the pure python PyMySQL bindings.

Simply pip install pymysql and switch your SQLAlchemy URI to start like this:

SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://.....' 

There are some other drivers you could also try.

回答2:

Or try this:

apt-get install python-mysqldb 

回答3:

I got this issue when I was working on SQLAlchemy. The default dialect used by SQLAlchemy for MySQL is mysql+mysqldb.

engine = create_engine('mysql+mysqldb://scott:tiger@localhost/foo') 

I got the "No module named MySQLdb" error when the above command was executed. To fix it I installed the mysql-python module and the issue was fixed.

sudo pip install mysql-python 

回答4:

My issue is :

return __import__('MySQLdb') ImportError: No module named MySQLdb 

and my resolution :

pip install MySQL-python yum install mysql-devel.x86_64 

at the very beginning, i just installed MySQL-python, but the issue still existed. So i think if this issue happened, you should also take mysql-devel into consideration. Hope this helps.

回答5:

may you try

pip install mysqlclient 

回答6:

It depends on Python Version as well in my experience.

If you are using Python 3, @DazWorrall answer worked fine for me.

However, if you are using Python 2, you should

sudo pip install mysql-python 

which would install 'MySQLdb' module without having to change the SQLAlchemy URI.

回答7:

So I spent about 5 hours trying to figure out how to deal with this issue when trying to run

./manage.py makemigrations 

With Ubuntu Server LTS 16.1, a full LAMP stack, Apache2 MySql 5.7 PHP 7 Python 3 and Django 1.10.2 I really struggled to find a good answer to this. In fact, I am still not satisfied, but the ONLY solution that worked for me is this...

sudo apt-get install build-essential python-dev libapache2-mod-wsgi-py3 libmysqlclient-dev 

followed by (from inside the virtual environment)

pip install mysqlclient 

I really dislike having to use dev installs when I am trying to set up a new web server, but unfortunately this configuration was the only mostly comfortable path I could take.

回答8:

While @Edward van Kuik's answer is correct, it doesn't take into account an issue with virtualenv v1.7 and above.

In particular installing python-mysqldb via apt on Ubuntu put it under /usr/lib/pythonX.Y/dist-packages, but this path isn't included by default in the virtualenv's sys.path.

So to resolve this, you should create your virtualenv with system packages by running something like:

virtualenv --system-site-packages .venv

回答9:

Got so many errors related to permissions and what not. You may wanna try this :

xcode-select --install 

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