Python System 模块，Array() 实例源码

def list_to_tree(input, none_and_holes=True, source=[0]):
    """Transforms nestings of lists or tuples to a Grasshopper DataTree"""
    from Grasshopper import DataTree as Tree
    from Grasshopper.Kernel.Data import GH_Path as Path
    from System import Array
    def proc(input,tree,track):
        path = Path(Array[int](track))
        if len(input) == 0 and none_and_holes: tree.EnsurePath(path); return
        for i,item in enumerate(input):
            if hasattr(item, '__iter__'): #if list or tuple
                track.append(i); proc(item,tree,track); track.pop()
            else:
                if none_and_holes: tree.Insert(item,path,i)
                elif item is not None: tree.Add(item,path)
    if input is not None: t=Tree[object]();proc(input,t,source[:]);return t

#================================================================

def CRStringToList(strList):
    return strList.Split(Array[str](CRLISTDELIMITER), StringSplitOptions.RemoveEmptyEntries)

def IsList(value):
    return isinstance(value, list) or isinstance(value, Array[str])

#all of the below will throw errors if the conversion is not possible
#this behaviour is intended and should be caught in the calling function
#which should report errors at runtime or in the log

def FieldConvert(self, strValue, strField=None):
        if dmGlobals.TraceFunctionMessages: print 'Method: dmParameters:FieldConvert(stringValue, stringFieldName)'

        FieldValue = self.Field
        if strField != None:
            FieldValue = strField

        theVal = strValue
        try:
            if FieldValue in dmGlobals.ALLOWEDVALS:
                if FieldValue in dmGlobals.FIELDSLIST and not dmGlobals.IsList(strValue):
                    theVal = strValue.Split(Array[str](dmGlobals.CRLISTDELIMITER), StringSplitOptions.RemoveEmptyEntries)
                elif FieldValue in dmGlobals.FIELDSBOOL and not dmGlobals.IsBool(strValue):
                    theVal = dmGlobals.StringToBool(strValue)
                elif FieldValue in dmGlobals.FIELDSDATETIME and not dmGlobals.IsDateTime(strValue):
                    theVal = dmGlobals.StringToDate(strValue)
                elif FieldValue in dmGlobals.FIELDSNUMERIC and not dmGlobals.IsFloat(strValue):
                    theVal = dmGlobals.StringToFloat(strValue)
                elif FieldValue in dmGlobals.FIELDSMANGAYESNO and not dmGlobals.IsMangaYesNo(strValue):
                    theVal = dmGlobals.StringToMangaYesNo(strValue)
                elif FieldValue in dmGlobals.FIELDSYESNO and not dmGlobals.IsYesNo(strValue):
                    theVal = dmGlobals.StringToYesNo(strValue)
                elif FieldValue in dmGlobals.FIELDSPSUEDONUMERIC and not isinstance(strValue,str):
                    try:                    
                        theVal = strValue.ToString()
                    except:
                        pass
            #otherwise just return the value
        except Exception as ex:

            pass
        return theVal