Difference between raise Exception, "foo" and raise Exception("foo")?

The title is pretty self explanatory -- what's the difference between:

raise Exception, "foo"

a开发者_开发问答nd

raise Exception("foo")

Does it do exactly the same thing, just different syntax?

I'm using Python 2.x, but I'd like to hear of any differences in Python 3.x

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both amount to the same thing in Python2. in Python3, the raise Exception, "foo" syntax is no longer supported.