Using Python to automate AutoCAD

[no]

Hi people,

Hope there are some Python users around in this group ;)

I'm learning Python and in the process am trying to automate AutoCAD
with Python via COM.

with the following code I can successfully start an AutoCAD session,
display the program on screen and start a new drawing:

>>>
from win32com.client import *

acad = Dispatch( 'AutoCAD.Application')
acad.Visible = 1

DWG = acad.Documents.Add('acadiso.dwt')
MS = DWG.ModelSpace
<<<

and the following statements let me pick a point in the drawing window
and return the coordinates as a tuple:

>>>
UTIL = DWG.Utility
punt1 = UTIL.GetPoint()
<<<

the value of the variable punt1 is e.g. (-5.3, 6.5, 0.0)

But sadly, that's about as far i can get things to work. For example:
when I try to draw a point in the drawing using another tuple as an
argument:

>>>
punt2 = MS.AddPoint((10.0, 10.0, 0.0))
<<<

I get the following error message:

>>>
Traceback (most recent call last):
File "<input>", line 1, in ?
File "<COMObject <unknown>>", line 2, in AddPoint
com_error: (-2147352567, 'Er is een uitzondering opgetreden.', (0,
None, None, None, 0, -2147024809), None)
<<<

reading the AutoCAD Developer Documentation, I discovered the
CreateTypedArray method which creates a variant that contains an
array, the method doesn't return the value, so I presume it changes
the argument VarArr in-place:

CreateTypedArray(VarArr, Type, Value1, [value2, value3, ...valueN])
VarArr = Variant; output-only; The array of values as a
variant.

Type = Visual Basic 6 Constant; input-only; The type of values
you are supplying. vbBoolean, vbInteger, vbLong,
vbSingle, or vbDouble.

Value1 [Value2, ...ValueN.] = Of the type specified in the
Type parameter above; input-only; The value(s) to be
included in the variant.

My thinking here is, that the AddPoint method expects a Variant
argument and not a tuple. But when I use this code to assign a Variant
array to variable punt3:

>>>
UTIL = DWG.Utility
punt3=()
UTIL.CreateTypedArray(punt3, pythoncom.VT_R8, 10.0, 10.0, 0.0)
<<<

I don't receive any error message, but variable punt3 still has his
old value of (), so nothing happened at all.

I was hoping to use this variable in the AddPoint method as follows:

punt2 = MS.AddPoint(punt3)

So, is there anybody who can help me with this?

Kind regards,

Gert