tree c3ca8087609373c676c816b548e748b70607b750
parent 2de97d398d5a66307228b1269812da94e65e20a3
author Guido van Rossum <guido@python.org> 1044301614 +0000
committer Guido van Rossum <guido@python.org> 1044301614 +0000
HG:extra convert_revision:svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/python/branches/legacy-trunk%4031178

_slotnames(): this is a fairly expensive calculation.  Cache the
outcome as __slotnames__ on the class.  (Like __slots__, it's not safe
to ask for this as an attribute -- you must look for it in the
specific class's __dict__.  But it must be set using attribute
notation, because __dict__ is a read-only proxy.)