QuantCo I am fortunate enough that some of the work done at QuantCo is open source. Datajudge Datajudge is a Python data testing library. Datajudge allows for the convenient expression and testing of expectations between different data source in database. It integrates nicely with pytest. For more, read our blog post or have a look at an example in the documentation. Pytsql pytsql is a Python library enabling the execution and parametrization of raw mssql scripts.| kevinkle.in