How to pass true or false to COM objects?
mhammond at skippinet.com.au
Tue Aug 20 04:05:51 CEST 2002
Duncan Booth wrote:
> sjoshi at ingr.com (Sunit Joshi) wrote in
> news:8f8ffe67.0208161214.4a39ce42 at posting.google.com:
>>I'm using MSXML4.0 and need to pass 'true' or 'false' values to the
>>COM object. Could someone tell me how to do that..??
> If my memory serves (and it might not), then passing True or False as
> values will work providing you are using Python 2.2.1 or later. In earlier
> versions you should make sure you pass in the result of a comparison: e.g.
> True, False = 1==1, 1==0
> somewhere in your code and you now have suitable values to pass in.
For the sake of completeness:
If the COM server reports to Python the types of the parameters, then
almost any true/false value will work. Integer 0 and 1 are commonly
used in this case.
If the COM server reports nothing about the types (or reports a generic
VARIANT) then Python will try and *guess* the type to pass. In this
case, passing a simple integer may cause the COM object see an integer
param - in this case, passing the result of the expression as Duncan
notes will force Python to assume boolean.
A reasonable paradigm may be to use code such as:
True, False = 1==1, 1==0
This should work for all Python versions, using the builting True and
False names if they exist.
Still not sure what to do about that new boolean builtin "Maybe" ;)
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