Cashflower

python

from cashflower import CSVReader

reader = CSVReader("data.csv")
value = float(reader.get_value("2", "C"))

This release introduces checks to ensure the settings are correct. It verifies that all settings are properly defined and that the output variables correspond to existing variables in the model.

In this version, we've changed the name of the setting:

`OUTPUT_COLUMNS` is now called `OUTPUT_VARIABLES`.

We've also updated the default value:

From `[]` (empty list) to `None`.

**Rationale:**

In the model, we use the word "variable" (like with the `variable()` decorator). While "column" relates to table formats, it doesn’t cover all the ways we can show results. Changing the name to `OUTPUT_VARIABLES` helps keep things consistent throughout the model.

For the default value, using `OUTPUT_VARIABLES=None` is clearer because it means that no specific set of variables is chosen, so all variables will be included in the output. On the other hand, `OUTPUT_VARIABLES=[]` might suggest that no variables should be output at all, which could lead to confusion or extra checks in your code.