Getting the following error:

E       ModuleNotFoundError: No module named 'MySQLdb'

../../build/gradleenv/1398941893/lib/python3.9/site-packages/sqlalchemy/dialects/mysql/mysqldb.py:149: ModuleNotFoundError

After searching on the web, it seems we will need to install mysqlclient.

I am trying to find out the root cause of why we need MySQLdb after testcontainers upgrade.

I followed the failed test code(

from testcontainers.mysql import MySqlContainer
container = MySqlContainer()
container.start()
print(container.get_connection_url())

Connection url from version 3.7.1

mysql+pymysql://test:test@localhost:32768/test

Connection url from version 4.10.0

mysql://test:test@localhost:32770/test

In version 3.7.1, it uses pymysql driver:
https://github.com/testcontainers/testcontainers-python/blob/28e3a471c32c1036dd5e37df13cdde3b1ba91000/testcontainers/mysql.py#L67

In version 4.10.0, if we do not specify dialect, it will not contain a driver in the url.

When we call sqlalchemy.create_engine(), the two urls are routed to different code paths

By adding dialect when initializing MySqlContainer, i.e. container = MySqlContainer(dialect='pymysql'), I am able to get the same connection url in 4.10.0 as 3.7.1.

Looks like the previous failed test is green now.
https://github.com/apache/beam/actions/runs/16014666896/job/45178934425?pr=35501

cc'ed @Amar3tto @damccorm

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