M.E.Farmer wrote: > I said exactly what I meant, the parentheses around the values creates > a tuple that you have no reference to! It also has a side effect of > binding the names inside the tuple to a value and placing them in the > local namespace( implicit tuple unpacking ). It might be the "same" as > no parens but it isn't very clear. If you want a tuple make it > explicit, if you want individual names make it explicit.
It actually is the same, and I don't think implicit or explicit is the difference you should be citing here. The parentheses are fully optional -- they don't change the semantics at all: py> t = (4, 5) py> a = t py> a is t True py> a = (b, c) = t py> a is t True py> a = b, c = t py> a is t True In all cases, "a" still gets assigned the tuple (4, 5). Whether or not you put the parentheses around "b, c" is fully a matter of style. I don't know the implementation enough to know whether or not a tuple is actually created when "b" and "c" are bound to their values, but I'd be willing to bet that whatever happens to "(b, c)" is exactly the same as what happens to "b, c". STeVe -- http://mail.python.org/mailman/listinfo/python-list
