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Source: flowmachine/

FlowMachine is a Python based SQL wrapper built specifically for Flowminder's PostgreSQL CDR database: Flowdb. It provides a standardised way of interfacing with our postgres database. FlowMachine provides SQL based queries that compute commonly used features and metrics to do with CDR data, such as DailyLocations, ModalLocations, Flows and RadiusOfGyration. The heart of flowmachine is the AbstractBaseClass Query, which defines how an SQL-based feature behaves. All metrics define an SQL querty, and inherit from FlowMachine's main Query() class.