Allow a formula to specify the period of its result array.
Correct Node repr.
Update flake8 config
Remove H* errors
Add support for rolling years and months.
Add comment for NaN detection.
Add comment.
Correct split of date strings.
Correct anystring_to_strict_int converter (validated with doctest).
In periods, rename "step" to "instant". Improve periods and instants converters.
Accept simplified notation like "2014", "2014-2" or "2014-1:2014-12" when converting JSON to a period.
Rename PeriodMixin.date (resp. date_str) to PeriodMixin.period_date (resp. period_date_str).
Improve conversion of periods.
Factorize method of scenarios that sets the axes of the simulation.
Factorize method of scenarios that sets the variables of a simulation.
Add support for multiple periods in JSON of input variables and axes.
Factorize conversion of JSON or Python to axes.
Add support for multiple periods in JSON of input variables.
Allow formula functions to be methods.
Factorize more Scenario converters.