Metal Zong wrote: > > The operator is and is not test for object identity: x is y is true if > and only if x and y are the same objects. > > > > >>> x = 1 > > >>> y = 1 > > >>> x is y > > True > > > > Is this right? Why? Thanks. > > > Yes that is true, but it's an implementation defined optimization and could be applied to *any* immutable type. For larger ints, such a thing is not true. >>> x=1000 >>> y=1000 >>> x is y False
If either is a surprise, then understand that the "is" operator should probably *never* be used with immutable types. Gary Herron -- http://mail.python.org/mailman/listinfo/python-list
