Conversion of iovsearch option for explicit distribution crashes

[rikardn]

It doesn't work to input a list of lists for the explicit distribution in iovsearch. I think that the type conversion is not working correctly.

Here are some example error messages:

Distribution = “explicit” 
param_list <- list('CL', 'VC', "F1", "MAT") 
- Exception: 'ValueError(\'distribution == "explicit" requires parameters to be given as lists of lists\')' 
 
param_list <- list(list('CL', 'VC', "F1", "MAT")) 
- Invalid `list_of_parameters`: got `[['CL', 'VC', 'F1', 'MAT']]` of type <class 'list'>, expected typing.Optional[typing.List[str]] 
 
param_list <- [list["CL", "VC", "F1", "MAT"]] 
- Error: unexpected '[' in "param_list <- [" 
 
param_list <- list["CL", "VC", "F1", "MAT"] 
- object of type 'builtin' is not subsettable 
 
param_list <- list[list('CL', 'VC', "F1", "MAT")] 
- Error in list[list("CL", "VC", "F1", "MAT")] : object of type 'builtin' is not subsettable 
 
param_list <- list(list('CL'), list('VC'), list("F1"), list("MAT")) 
- Invalid `list_of_parameters`: got `[['CL'], ['VC'], ['F1'], ['MAT']]` of type <class 'list'>, expected typing.Optional[typing.List[str]] 
 
distribution = “disjoint” 
param_list <- list(list('CL'), list('VC'), list("F1"), list("MAT")) 
Invalid `list_of_parameters`: got `[['CL'], ['VC'], ['F1'], ['MAT']]` of type <class 'list'>, expected typing.Optional[typing.List[str]]