我正试图使用linux机器上的python连接器连接到MariaDB,在这样做的同时,我收到了以下错误;
(venv) [admin@server connector_testing]$ python mariadb_connector.py
Traceback (most recent call last):
File "mariadb_connector.py", line 15, in <module>
engine = create_engine(CONNECTION_STRING)
File "<string>", line 2, in create_engine
File "/home/admin/Downloads/venv/lib/python3.7/site-packages/sqlalchemy/util/deprecations.py", line 309, in warned
return fn(*args, **kwargs)
File "/home/admin/Downloads/venv/lib/python3.7/site-packages/sqlalchemy/engine/create.py", line 560, in create_engine
dbapi = dialect_cls.dbapi(**dbapi_args)
File "/home/admin/Downloads/venv/lib/python3.7/site-packages/sqlalchemy/dialects/mysql/mariadbconnector.py", line 106, in dbapi
return __import__("mariadb")
File "/home/admin/Downloads/venv/lib/python3.7/site-packages/mariadb/__init__.py", line 10, in <module>
from ._mariadb import (
ImportError: libmariadb.so.3: cannot open shared object file: No such file or directory
从PYPI安装mariadb所采取的步骤:pip install sqlalchemy
pip install mariadb
注意:除了来自PYPI的pip install mariadb
之外,在linux系统中,pip脚本还搜索了mariadb_config,该配置必须从mariadb网站下载并安装——[Connector/C]。我已经安装了Connector/C,并且能够在python环境中成功地从PYPI安装mariadb库
此外,当我安装MariaDB Connector-C时,我注意到在";lib/mariadb">我们拥有的目录";libmariadb.so.3";
mariadb connector-c had these 3 directories:
(venv) [admin@server mariadb-connector-c-3.1.9-centos7-amd64]$ ls -rlt
drwx------. 4 admin admin 38 Jun 19 2020 lib
drwx------. 3 admin admin 21 Jun 19 2020 include
drwx------. 2 admin admin 28 Jun 19 2020 bin
(venv) [admin@server lib]$ ls -lrt
drwx------. 2 admin admin 27 Jun 19 2020 pkgconfig
drwx------. 3 admin admin 90 Jun 19 2020 mariadb
(venv) [admin@server mariadb]$ ls -lrt
-rwx------. 1 admin admin 1525776 Jun 19 2020 libmariadb.so.3
-rw-------. 1 admin admin 2677912 Jun 19 2020 libmariadbclient.a
drwx------. 2 admin admin 186 Jun 19 2020 plugin
lrwxrwxrwx. 1 admin admin 15 Jun 19 2020 libmariadb.so -> libmariadb.so.3
因此,我已将其复制到出现错误的位置:/home/admin/Downloads/venv/lib/python3.7/site packages/mariadb,但仍然出现相同的错误。
(venv) [admin@server mariadb]$ pwd
/home/admin/Downloads/venv/lib/python3.7/site-packages/mariadb
(venv) [admin@server connector_testing]$ cd /home/admin/Downloads/venv/lib/python3.7/site-packages/mariadb
(venv) [admin@server mariadb]$ ls -lrt
-rwx--x--x. 1 admin admin 465280 Nov 30 14:46 _mariadb.cpython-37m-x86_64-linux-gnu.so
-rw-------. 1 admin admin 928 Nov 30 14:46 __init__.py
drwx------. 2 admin admin 37 Nov 30 14:46 __pycache__
drwx------. 3 admin admin 119 Nov 30 14:46 constants
-rwx------. 1 admin admin 1525776 Dec 3 10:08 libmariadb.so.3
-rw-------. 1 admin admin 2677912 Dec 3 10:08 libmariadbclient.a
lrwxrwxrwx. 1 admin admin 15 Dec 3 10:08 libmariadb.so -> libmariadb.so.3
drwx------. 2 admin admin 186 Dec 3 10:08 plugin
如果有人在mariadb连接器上遇到过类似的问题,你能告诉我如何解决错误吗。
提前感谢,Nikhil I
正如错误消息所说,MariaDB Connector/Python无法从Connector/C中找到共享库。
如果您没有通过包管理器安装连接器/C(通常包管理器负责库路径(,则必须指定可以在哪里找到共享对象。
解决方案1:
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/pathof/libmariadbso
export LD_LIBRARY_PATH
解决方案2(永久(:
将路径添加到/etc/ld.so.conf
,然后运行ldconfig
(作为根(
只需安装yum-install-MariaDB shared。
我只使用另一个SQL驱动程序(pymysql(连接到Maria DB,就解决了这个问题。
旧:
CONNECTION_STRING = 'mariadb+mariadbconnector' + '://{}:{}@{}:{}/{}'.format(USERNAME, quote(PASSWORD), HOST, str(PORT), DB_NAME)
修改为:
CONNECTION_STRING = 'mariadb+pymysql' + '://{}:{}@{}:{}/{}'.format(USERNAME, quote(PASSWORD), HOST, str(PORT), DB_NAME)
感谢