Michel Claveau wrote:
Hi!
Not a question. Only a little note... (for readers without Sunday
activity)
In (pure) Python, consider this code:
def ftest():
vret=(111,222,333)
return(vret)
print ftest() #give: (111, 222, 333)
In (COM) Python, the same method of the class of a dynamic-COM-server
give other return:
def ftest():
vret=(111,222,333)
return(vret)
pv = win32com.client.Dispatch('.......
print pv.ftest() #give: 111
In (pure) Python, this code:
def ftest():
vret=(111,222,333)
return(vret,) #note the comma!
print ftest() #give: ((111, 222, 333),)
In (COM) Python, the same method of the class of a dynamic-COM-server
give other return:
def ftest():
vret=(111,222,333)
return(vret,) #note the comma!
pv = win32com.client.Dispatch('.......
print pv.ftest() #give: (111, 222, 333)
Another detail:
def ftest():
vret=[111,222,333] #list in the place of tuple
return(vret)
pv = win32com.client.Dispatch('.......
print pv.ftest() #give: (111, 222, 333)
And, to finish: in COM, return(vret) & return(vret,) give the same
result.
I wish you marvellous Sunday, with sun, bathe and aperitif.
Misunderstanding about return values:
> def ftest():
> vret=(111,222,333)
> return(vret)
This is the same as: return vret because the outer () are discarded as they are
superfluous. You could write return ((((vret)))) and it would do the same
thing. It still gets intrepreted as return tuple(111,222,333).
COM obviously treats things differently.
If you have a tuple and want to return it, just return it: return vret
If you want to wrap objects in a tuple to return it, I would recommend using the
build in tuple() command as the parenthesis can be confusing: return
tuple(111,222,333).
The reason return (vret,) works is because it is the same as: return
tuple(tuple(111,222,333) (the trailing comma is the key here and is what tells
python you mean a tuple instead of the "normal" parenthesis meaning.
May seem inconsistent, but I don't believe it really is.
-Larry
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