[Tutor] How to create array of variants?

[Krasyn]

Alan Gauld wrote:
> 
> 
> "Krasyn" <mndrk at mail.ru> wrote
> 
>>>
>>> I'm trying to translate the following VB code into Python and not 
>>> sure how
>>> to create an array of variants.
> 
> All variables in Python are effectively variants - variables that can
> store any type. So an array of variants equates to a Python list
> 
>>> VB Code:
>>> Sub SetXdata()
> 
> def SetXData():
> 
>>>     Dim lineObj As AcadLine
>>>     Set lineObj = ThisDrawing.ModelSpace.Item(0)
> 
> 
> lineObj = ThisDrawing.ModelSpace.Item(0)
> 
> Where ThisDrawing.ModelSpace.Item(0) is s0ome kind of
> data structure you have defined elsewhere. Or fetch using COM.
> 
>>>     Dim DataType(0 To 1) As Integer
>>>     Dim Data(0 To 1) As Variant
> 
> DataType = []
> Data = []
> 
> But it looks like you are trying to fake a dictionary - although VB
> has dictionaries!
> 
>>>     DataType(0) = 1001: Data(0) = "Test_Application"
>>>     DataType(1) = 1070: Data(1) = 600
> 
> Data = {'Test_application' : 1001, 600 : 1070}
> 
>>>     lineObj.SetXdata DataType, Data
> 
> lineObj.SetXdata( Data )
> 
>>> Python code
>>> import array
>>> import comtypes.client
>>>
>>> def SetXData():
>>>     activedoc =
>>> comtypes.client.GetActiveObject("AutoCAD.Application").ActiveDocument
>>>     line = activedoc.ModelSpace.Item(0)
>>>
>>>     dataType = array.array('i', [1001, 1070])
>>>     dataValue = array.array('?', ['Test_Application', 600]) #What 
>>> should I
>>> use
>>> for the type code?
>>>
>>>     line.SetXData(dataType, dataValue)
> 
> Here's the snag with the dictionary approach so its back to
> two lists.  I wouldn't use the array module just lists.
> 
> It might be enough to just pass DataType and Data as two lists
> into the COM object. I don't know enough about Python's COM
> integration to be sure that it will sort it all out though. But I 
> suspect
> it will.
> 
> 
> -- 
> Alan Gauld
> Author of the Learn to Program web site
> http://www.freenetpages.co.uk/hp/alan.gauld 
> 
> 
> _______________________________________________
> Tutor maillist  -  Tutor at python.org
> http://mail.python.org/mailman/listinfo/tutor
> 
> 

# -*- coding:UTF-8 -*-
from comtypes.client import *
from array import array

acad = GetActiveObject("AutoCAD.Application")
dwg = acad.ActiveDocument
mspace = dwg.ModelSpace
circle = mspace.AddCircle(array("d",[0,0,0]),100)
circle.Color = 3
acad.ZoomExtents()
dtype = array("h",[1001,1070]) # [1001,1070] doesnt' work (comtypes 0.5.1)
dvalue = ['Test_Application', 600] #OK VARIANT is not needed
circle.SetXData(dtype,dvalue)
#test: (entget (car (entsel)) '("*"))
#result:((-1 . <Entity name: 7ef98150>) (0 . "CIRCLE") (330 . <Entity 
name: 7ef01cf8>) (5 . "12A") (100 . "AcDbEntity") (67 . 0) (410 . "Model")
(8 . 
"0") (62 . 3) (100 . "AcDbCircle") (10 0.0 0.0 0.0) (40 . 100.0) (210 0.0
0.0 
1.0) (-3 ("Test_Application" (1070 . 600))))
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