Re: [Jython-users] problems starting threads

[Kevin B. <kb...@ca...>]

(expression) is a parenthized expression, not a tuple.

Python 2.2 (#28, Dec 21 2001, 12:21:22) [MSC 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> type(  (1) )
<type 'int'>
>>> type(  (1,) )
<type 'tuple'>
>>>

Funky syntax, but you really don't want

	(5 + 10) 

to be a tuple.

kb

"Russo, Tom" wrote:
> 
> Hi,
> 
> When I run the following:
> 
> <file name="demo.py">
> import thread
> 
> thread.start_new_thread(lambda x,y:(x,y), (1,2))        # succeeds
> thread.start_new_thread(lambda x:x, (1))                  # fails
> </file>
> 
> I get:
> 
> <output>
> Traceback (innermost last):
>   File "demo.py", line 4, in ?
> TypeError: start_new_thread(): 2nd arg can't be coerced to
> org.python.core.PyTuple
> </output>
> 
> Is there some reason I should be able to use a function of two arguments
> when starting a thread, but not a function of one argument?  Does jython not
> recognize (1) as a tuple in this case?
> 
> thanks
> _t
> 
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