MS COM early and late binding

[Olaf Meding]

Is there a way to find out if I am using early or late binding given
the reference ("excel" in the example below) returned by Dispatch()?
[color=blue][color=green][color=darkred]
>>> import win32com.client
>>> excel = win32com.client .Dispatch('Exce l.Application')[/color][/color][/color]

Thanks much for your help.

Olaf

[Thomas Heller]

Re: MS COM early and late binding

OlafMeding@comp userve.com (Olaf Meding) writes:
[color=blue]
> Is there a way to find out if I am using early or late binding given
> the reference ("excel" in the example below) returned by Dispatch()?
>[color=green][color=darkred]
>>>> import win32com.client
>>>> excel = win32com.client .Dispatch('Exce l.Application')[/color][/color]
>[/color]

try:
excel.visible
except AttributeError:
print "late bound"
else:
print "early bound"

Hint: Attributes are case sensitive when early bound ;-)

Thomas

[Olaf Meding]

Re: MS COM early and late binding

Thomas

What you suggest might work, but does not look to elegant. Can anyone else
perhaps suggest a more elegant solution? Thanks.

Olaf


try:
excel.visible
except AttributeError:
print "late bound"
else:
print "early bound"

Hint: Attributes are case sensitive when early bound ;-)

[Mark Hammond]

Re: MS COM early and late binding

Olaf Meding wrote:
[color=blue]
> Is there a way to find out if I am using early or late binding given
> the reference ("excel" in the example below) returned by Dispatch()?
>
>[color=green][color=darkred]
>>>>import win32com.client
>>>>excel = win32com.client .Dispatch('Exce l.Application')[/color][/color][/color]

There is no great way to find out (other than looking at the repr() of
the object or trying Thomas's trick), but there is a way to force one or
the other.

excel = win32com.client .gencache.Ensur eDispatch(excel )

Will ensure you have early bound, executing makepy if necessary.

excel = win32com.client .dynamic.DumbDi spatch(excel)

Will force late bound, even if the object is currently early.

Mark.

[Simon Brunning]

Re: MS COM early and late binding

"Olaf Meding" <OlafMeding@noS pam.compuserve. com> wrote in message news:<408ed8e5$ 1_1@newspeer2.t ds.net>...[color=blue]
> What you suggest might work, but does not look to elegant. Can anyone else
> perhaps suggest a more elegant solution? Thanks.[/color]

Not elegant? This is COM, you know!

Anyway, I do this:

excel = win32com.client .gencache.Ensur eDispatch('Exce l.Application')

Then I know I'm using early binding.

Cheers,
Simon B.