Question 1

PyMySQL vs mysqlclient: which one should I use?

Accepted Answer

PyMySQL is pure-Python and easier to install, ideal for cross-platform compatibility and simplicity. mysqlclient is C-based and offers better performance but can have compilation issues. Choose PyMySQL for portability, mysqlclient for speed in production environments.

Question 2

How to install PyMySQL with RSA authentication support?

Accepted Answer

Use 'pip install PyMySQL[rsa]' to include the necessary dependency for sha256_password or caching_sha2_password authentication. This installs the rsa package alongside PyMySQL, enabling secure password handling as noted in the README.

Question 3

Does PyMySQL support connection pooling?

Accepted Answer

PyMySQL does not have built-in connection pooling. You need to implement it manually or use external libraries like DBUtils. Consider this if your application handles many concurrent connections to avoid performance bottlenecks.

Question 4

How to handle transactions with PyMySQL?

Accepted Answer

Transactions are managed through the connection object: use 'connection.commit()' to save changes and 'connection.rollback()' to revert. Autocommit is off by default, so explicit commits are required, as shown in the example code.

Question 5

PyMySQL performance issues with large datasets?

Accepted Answer

While functional, PyMySQL may be slower with large datasets due to its pure-Python nature. Optimize with efficient queries and batch operations; for high-load scenarios, a C-based driver like mysqlclient might be better suited.

Question 6

Setting up PyMySQL with Django ORM?

Accepted Answer

Configure Django's DATABASES setting with 'ENGINE': 'django.db.backends.mysql' and ensure PyMySQL is installed. Note that Django's default backend is optimized for mysqlclient, so you might need to adjust settings or use third-party adapters for best results.

Question 7

Troubleshooting common PyMySQL connection errors?

Accepted Answer

Common errors include authentication failures and timeouts. Check MySQL server logs, verify credentials, and ensure network connectivity. The StackOverflow tag 'pymysql' is recommended for community support, as referenced in the README.

pymysql

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