On Monday, March 25, 2019 at 6:00:28 AM UTC-4, Simon King wrote:

SQLAlchemy normally wraps all DBAPI exceptions in its own exception 
> classes. If that's not working for you, could you show an example that 
> we can run to reproduce the problem? 


In addition, please share the versions of SqlAlchemy and Sqlite you are 
using.  The correct behavior is as you expect and Simon confirmed- you 
should see a `sqlalchemy.exc.IntegrityError` raised, which wraps the 
underlying `sqlite3.IntegrityError`. 

The most likely issues for what you experience are:

1. a mistake in your code
2. an old version of a library
3. a breaking change in a library


 

-- 
SQLAlchemy - 
The Python SQL Toolkit and Object Relational Mapper

http://www.sqlalchemy.org/

To post example code, please provide an MCVE: Minimal, Complete, and Verifiable 
Example.  See  http://stackoverflow.com/help/mcve for a full description.
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