Weird asyncore behaviour

[Freddie]

Hi,

I've been playing around with asyncore for one of my projects, currently 
using it to fetch HTTP pages without blocking things. Having a few 
issues, though. With the code below, I would start a new async_http 
instance with "async_http(url, returnme)". If it encountered a redirect, 
that object would start a new one as "async_http(url, returnme, 
seen=self._seen)" to remember what URLs it had seen. The problem is that 
after a while (usually after several async_http objects are active at 
once), newly created async_http objects would have the seen parameter 
with URLs filled in already! I have absolutely no idea how that could be 
happening :\ I 'solved' it by explicitly passing "seen={}" for new 
objects, but I would still like to know why this is happening :)

Freddie


class async_http(asyncore.dispatcher):
	def __init__(self, parent, returnme, url, seen={}):
		asyncore.dispatcher.__init__(self)
		self.parent = parent
		self.returnme = returnme
		self.url = url
		self._seen = seen
		# split url, connect, etc
	
	# at some point in here, we would find a redirect and go:
	def at_some_point(self):
		self._seen[self.url] = 1
		async_http(self.parent, self.returnme, self.url, self._seen)
		self.close()