[Zope] Python: methods arguments limited to 256?

[Andy McKay]

Julio Silva wrote:
> Well... we could start a thread on that matter but we dont have time, I 
> find some real exceptional cases in my programming life, specialy in my 
> glueware legacyware programming.
> Suppose you use zope to migrate legacy databases and suppose you find 
> yourself with a legacy table with 400 fields, there you must start your 
> brain in high creative mode and with default value infinite on patience 
> variable :-)

Agreed, but there's still better ways to go, pass through a struct or 
object that contains the variables and access them in DTML ;)

> Thanks for you help Andy, but I'm positive certain by the debug I'm 
> making that if I pass 255 parameters its ok, once I pass the 256th the 
> error begin to arise, I have measures to certify there
> is no character encode problem, that was the first thing I checked.

> Make this test: create a python script and copy the code below into it 
> and try to "save changes"
> you get the error. take out one parameter and hit "save changes" again 
> you will be able to save the document with no errors.

Ah I was doing something slightly different in my test.

I'll still say its a real edge case that does not need fixing, however 
the error message for a Python Script could be clearer.

Anyway use *, and **... Here's my test case that passes in over 500 
arguments into a Python Script and it works just fine.

args = []
for x in range(256):
   args.append("%sx")

kw = {}
for x in range(256):
   kw["%sx" % x] = x

container.someMethod(*args, **kw)
print len(args), len(kw)
return printed

And that works fine ;)
-- 
   Andy McKay
   ClearWind Consulting
   http://www.clearwind.ca