Passing Non-Numeric Parameters to lean optimize

Looks like the below also works for non-numeric parameter passing:

        {
            "name": "start_date",
            "value": "2010-01-01"
        },
        {
            "name": "end_date",
            "value": "2022-04-30"
        }

But if I want to pass multiple non-numeric values as the parameter than the optimization errors out

        {
            'name':'start_date',
            'value': ['2010-01-01', '2015-01-01'] 
        },

Hi Nottakumasato 

You may use the trick of encoding your parameter with numerical value:

def Initialize(self):
    self.params = {
        1: "2010-01-01",
        2: "2015-01-01"
    }
    choice = self.GetParameter("start_date")
    self.param = self.params[choice]

Then set the parameter config by

{
    "name": "start_date",
    "min": 1,
    "max": 2,
    "step": 1
}

Best
Louis