On 10/05/2012 12:33 AM, Tom wrote:
Sorry to interject here but I have a question along the same vein:
If I have a script (in this case that interacts with Word through
win32com.client) with statements like this:
doc.ActiveWindow.Selection.BoldRun()
doc.ActiveWindow.Selection.TypeText(_type)
doc.ActiveWindow.Selection.BoldRun()
Does each line require 3 COM calls, one for ActiveWindow, one for
Selection and one for the method being called, or is the Selection
object cached somewhere?
It requires 3 COM calls - there is no caching (and your code above is a
good example of why - the "ActiveWindow" could easily change between the
value being cached and it being reused).
The question really is the code below more efficient than the code above
in terms of COM calls, or is the difference minimal?
selec = doc.ActiveWindow.Selection
selec.BoldRun()
selec.TypeText(_type)
selec.BoldRun()
The above would be more efficient.
Cheers,
Mark
Its something I have always wondered. Thanks!
On Tue, May 8, 2012 at 5:45 PM, Tim Roberts <t...@probo.com
<mailto:t...@probo.com>> wrote:
DANIEL POSE wrote:
> Hello,
>
> I am writing code to program AutoCAD access from Python using
pywin32.
> When I need to work with a high number of AutoCAD objects, it is
> faster to use vba than python.
> Are there some way to speed up python code in order to work faster
> with AutoCAD elements?
> For example in the next code when I work with 512 AutoCAD blocks:
> ...
>
> The output for the code is the following:
>
> M_dimension= 512
> R_dimension= 262144
> t_block1= 4.25343304805
> t_block2= 3.88635510938
> t_block3= 0.487477319045
>
>
> Then it is faster to work with R than M, even though R is bigger.
>
I hope that's not a surprise to you. The first loop (block2) involves
two calls into the AutoCAD COM object in each iteration. The second
loop (block3) is simply manipulating lists of integers, entirely within
Python.
> Some suggestions for speed up pywin32 code in this example?
>
There isn't really anything here to speed up. You're just "glue". The
work is being done in AutoCAD. It is almost impossible for me to
believe that Visual Basic does this same loop any faster.
However, you can certainly try switching to early binding by using:
acad= win32com.client.gencache.EnsureDispatch("AutoCAD.Application")
--
Tim Roberts, t...@probo.com <mailto:t...@probo.com>
Providenza & Boekelheide, Inc.
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