Bug?? reusing objects

[Damian Menscher]

The following test program demonstrates what I believe is a bug:
-------------------------------------------------------------
#!/tmp/Python-2.2.1/python

class foobar:
   def __init__(self, string=[]):
      self.data = string
   def add(self, new=""):
      self.data.append(new)

a = foobar("foo")
print a.data

a = foobar("bar")
print a.data

a = foobar()
print a.data

a.add("foo")
a.add("bar")
print a.data

a = foobar()
print a.data   ### returns ['foo', 'bar'] for me
               ### I'd expect it to return []
-------------------------------------------------------------
If this is expected behavior, could someone please explain it?
Otherwise, I'll be happy to file a bug report.

Damian Menscher
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