Some remarks now. pod considers that any cell containing something of the form ="..." (= a formula whose result is a string and that is directly expressed as a string literal, surrounded by double quotes) will contain a Python expression, that will be executed according to the current context. pod statements (like the note containing do row for person in staff), allowing to conditionaly or repeatedly include parts of the spreadsheet, are expressed in the same way as in ODT templates (check here for more details).
Within ODT templates, any Python expression is converted to string, because an ODT is only made of text. Within ODS templates, a Python expression that produces a Python int, long or float will be rendered as a float value within the resulting spreadsheet. In the previous example, cells containing pages are float values.
Within ODT templates, any Python expression is converted to string, because an ODT is only made of text. Within ODS templates, a Python expression that produces a Python int, long or float will be rendered as a float value within the resulting spreadsheet. In the previous example, cells containing ages are float values.
Within an ODS spreadsheet, every sheet is internally represented as a table. With statements like do table for... you should be able to repeat a template sheet and produce several sheets in the resulting spreadsheet.