Why Am I Getting an SQLite Reference Error When Using Pandas and SQLAlchemy to Write to a MySQL Database?

Error When Writing to MySQL Database with Pandas and SQLAlchemy

When attempting to write a Pandas dataframe to a MySQL table using SQLAlchemy's to_sql method, a common error is encountering a reference to SQLite despite using MySQL. This issue can occur due to the use of the flavor='mysql' parameter when creating the SQLAlchemy engine.

Deprecation of 'flavor' Parameter

The flavor='mysql' parameter is deprecated in the favor of using the dialect parameter. The correct usage is:

engine = create_engine('mysql+mysqlconnector://[user]:[pass]@[host]:[port]/[schema]', dialect='mysql', echo=False)

Correct Usage of SQLAlchemy Connection

To establish a connection with MySQL using mysqlconnector, you should use:

cnx = engine.connect()

Instead of the deprecated raw_connection().

Resolving the Error

To resolve the error that references SQLite, use the following steps:

1. Update the engine creation to use the correct dialect:

   engine = create_engine('mysql+mysqlconnector://[user]:[pass]@[host]:[port]/[schema]', dialect='mysql', echo=False)

2. Establish a connection using:

   cnx = engine.connect()

3. Use the cnx object to perform SQL operations. For example, to write a dataframe:

   data.to_sql(name='sample_table2', con=cnx, if_exists='append', index=False)

By following these steps, you can successfully write to a MySQL database using Pandas and SQLAlchemy.

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