问题:ImportError:没有名为MySQLdb的模块

我指的是以下教程来为我的Web应用程序创建登录页面。 http://code.tutsplus.com/tutorials/intro-to-flask-signing-in-and-out–net-29982

我的数据库有问题。我正在

ImportError: No module named MySQLdb

当我执行

http://127.0.0.1:5000/testdb

我已经尝试了所有可能的方法来安装python mysql,这是本教程中提到的一种,easy_install,sudo apt-get install。

我已经在虚拟环境中安装了mysql。我的目录结构与本教程中说明的目录结构相同。该模块已成功安装在我的系统中,但仍然出现此错误。

请帮忙。是什么原因造成的。

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 0

如果您在编译二进制扩展名时遇到问题,或者在无法扩展的平台上,则可以尝试使用纯python PyMySQL绑定。

只需pip install pymysql切换您的SQLAlchemy URI即可,如下所示:

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

您还可以尝试其他一些驱动程序

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 1

或尝试以下方法:

apt-get install python-mysqldb

Or try this:

apt-get install python-mysqldb

回答 2

你可以尝试

pip install mysqlclient

may you try

pip install mysqlclient

回答 3

我的问题是:

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

和我的决议:

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

在开始的时候,我刚刚安装了MySQL-python,但是问题仍然存在。因此,我认为如果发生此问题,您还应该考虑mysql-devel。希望这可以帮助。

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 4

在研究SQLAlchemy时遇到了这个问题。SQLAlchemy用于MySQL的默认方言是mysql+mysqldb

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

No module named MySQLdb执行上述命令时出现“ ”错误。要修复它,我安装了mysql-python模块,此问题已解决。

sudo pip install mysql-python

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 5

根据我的经验,它也取决于Python版本。

如果您使用的是Python 3,则@DazWorrall答案对我来说效果很好。

但是,如果您使用的是Python 2,则应该

sudo pip install mysql-python

这将安装“ MySQLdb”模块,而无需更改SQLAlchemy URI。

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 6

所以我花了大约5个小时试图弄清楚在尝试运行时如何处理此问题

./manage.py makemigrations

使用Ubuntu Server LTS 16.1,完整的LAMP堆栈,Apache2 MySql 5.7 PHP 7 Python 3和Django 1.10.2,我确实很难找到一个好的答案。实际上,我仍然不满意,但是对我有用的唯一解决方案是……

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

其次(从虚拟环境内部)

pip install mysqlclient

我真的不喜欢在尝试设置新的Web服务器时必须使用dev install,但是不幸的是,这种配置是我唯一可以采用的舒适方式。

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 7

尽管@Edward van Kuik答案是正确的,但并未考虑virtualenv v1.7及更高版本的问题

特别是在Ubuntu 上python-mysqldb通过via apt进行安装时,将其放在下/usr/lib/pythonX.Y/dist-packages,但virtualenv的默认情况下不包含此路径。sys.path

因此,要解决此问题,您应该通过运行类似以下内容的系统包来创建您的virtualenv:

virtualenv --system-site-packages .venv

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 8

有太多与权限有关的错误,什么也没有。您可能想试试这个:

xcode-select --install

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

xcode-select --install

回答 9

yum install MySQL-python.x86_64

为我工作。

yum install MySQL-python.x86_64

worked for me.


回答 10

在ubuntu 20中,您可以尝试以下操作:

sudo apt-get install libmysqlclient-dev
sudo apt-get install gcc
pip install mysqlclient

In ubuntu 20 , you can try this :

sudo apt-get install libmysqlclient-dev
sudo apt-get install gcc
pip install mysqlclient

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