Geraldo Reports is a Python library for generating reports. It allows creating reports with bands like detail, page header, and page footer. Reports can include elements, aggregations, sub-reports, and groupings. Examples show how to define a permissions report with bands, labels, and object values to display permissions data. Geraldo Reports uses ReportLab for rendering and supports common reporting features found in other languages and products like Delphi, Java, .NET, and MS Access.