导入错误：没有名为_mysql的模块

Question

I am trying to import MySQLdb using python 2.7, while I am getting the below error. I am new on Ubuntu, so unable to figure out where things are going wrong.

error message :

import MySQLdb
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/MySQLdb/__init__.py", line 19, in <module>
ImportError: No module named _mysql

Could you please help me out ?

i have used below commands to install python mysqldb

$ gunzip MySQL-python-1.2.4b4.tar.gz
$ tar -xvf MMySQL-python-1.2.4b4.tar
$ cd MySQL-python-1.2.4b4
$ python setup.py build
$ python setup.py install

Answer 1

Install python-mysqldb :

You can intall this package in Ubuntu via this command:

apt-get install python-mysqldb

Answer 2

Python DB interface api "MySQLdb"installation @RHEL version 6.4

(Probably should work with other Unix Flv too).

I installed the MySQLdb Version 1.2.2 and faced the same problem ie ImportError: No module named _mysql

Note : Following explanation does tells anything about debugging the problem rather workaround by installing the "MySQLdb" version 1.2.5 which is working absolutely fine.

steps followed :

[user@hostname]$:wget http://downloads.sourceforge.net/mysql-python/MySQL-[user@hostname]$:python-1.2.2.tar.gz
[user@hostname]$:tar -xvf MySQL-python-1.2.2.tar
[user@hostname]$:cd MySQL-python-1.2.2
[user@hostname]$:python setup.py build
[user@hostname]$:python setup.py install 

Note:user should have privilege to execute the command - sudo (advised) or else root user and installation was suceesful

Later episode : ERROR :-

[user@hostname]$: python 

Python 2.7.9 (default, May 23 2015, 09:01:18) 

[GCC 4.4.7 20120313 (Red Hat 4.4.7-3)] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import MySQLdb
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "MySQLdb/__init__.py", line 19, in <module>
    import _mysql
ImportError: No module named _mysql

WORK AROUND : Renamed the Binary file "MySQL_python-1.2.2-py2.6-linux-i686.egg" @location : /usr/lib/python2.6/site-packages. (Generally @location where the "MySQL....i686.egg" is created after executing the command "python setup.py install" or "sudo python setup.py install")

Better option is to uninstall MySQLdb version 1.2.2 or in other cases namely version 1.2.4 and check "MySQL....i686.egg" file does not exist.

[user@hostname site-packages]$ sudo mv MySQL_python-1.2.2-py2.6-linux-i686.egg 123MySQL_python-1.2.2-py2.6-linux-i686.123egg

WHATS NEXT :

1.go to https://pypi.python.org/pypi/MySQL-python/1.2.5

2.Download "MySQL-python-1.2.5.zip" i have downloaded "MySQL-python-1.2.5.zip" in the folder named "download"

[user@hostname]$:cd download 
[user@hostname]$:unzip MySQL-python-1.2.5.zip
[user@hostname]$:cd MySQL-python-1.2.5
[user@hostname]$:ls
doc      HISTORY  MANIFEST.in   _mysql.c  _mysql_exceptions.py   PKG-INFO       README.md  setup_common.py  setup.py          site.cfg
GPL-2.0  INSTALL  metadata.cfg  MySQLdb   MySQL_python.egg-info  pymemcompat.h  setup.cfg  setup_posix.py   setup_windows.py  tests
[user@hostnaem]$:sudo python setup.py install 
    running install
    ...............
.......................
    Installed /usr/lib/python2.6/site-packages/MySQL_python-1.2.5-py2.6-linux-i686.egg
    Processing dependencies for MySQL-python==1.2.5
    Finished processing dependencies for MySQL-python==1.2.5
[user@hostname]$:python  
    Python 2.7.9 (default, May 23 2015, 09:01:18) 
    [GCC 4.4.7 20120313 (Red Hat 4.4.7-3)] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import MySQLdb
    >>> import MySQLdb
    >>> dir(MySQLdb)
['BINARY', 'Binary', 'Connect', 'Connection', 'DATE', 'DATETIME', 'DBAPISet', 'DataError', 'DatabaseError', 'Date', 'DateFromTicks', 'Error', 'FIELD_TYPE', 'IntegrityError', 'InterfaceError', 'InternalError', 'MySQLError', 'NULL', 'NUMBER', 'NotSupportedError', 'OperationalError', 'ProgrammingError', 'ROWID', 'STRING', 'TIME', 'TIMESTAMP', 'Time', 'TimeFromTicks', 'Timestamp', 'TimestampFromTicks', 'Warning', '__all__', '__author__', '__builtins__', '__doc__', '__file__', '__name__', '__package__', '__path__', '__revision__', '__version__', '_mysql', 'apilevel', 'connect', 'connection', 'constants', 'debug', 'escape', 'escape_dict', 'escape_sequence', 'escape_string', 'get_client_info', 'paramstyle', 'release', 'result', 'server_end', 'server_init', 'string_literal', 'test_DBAPISet_set_equality', 'test_DBAPISet_set_equality_membership', 'test_DBAPISet_set_inequality', 'test_DBAPISet_set_inequality_membership', 'thread_safe', 'threadsafety', 'times', 'version_info']

Import MySQLdb is working fine....FINALLY WORKING ?

Answer 3

As the error message says, you will need to install MySQLdb .

The common way to install MySQLdb is to use pip as described here. But for Ubuntu, the recommended way is what was mentioned in the previous answer:

sudo apt-get install python-mysqldb

However, you will need first to install the necessary dependencies:

sudo apt-get install build-essential python-dev libmysqlclient-dev

Now you should be able to import it: >>> import MySQLdb

Answer 4

apt-get install python-mysql.connector