How to force a single number to be a tuple

[Jinming Xu]

Hi Folks,

I have a number sequence, which is put into a tuple like this:

y=2, 3.0, 4.5

I can manipulate the sequence as a tuple when it has more than 1 number. But 
when the sequence has only 1 number, like

y=2

I have trouble to manipulate it as a tuple.  I guess there must be a way to 
forece a single number to be a tuple. Could anyone please tell me that?

Thanks,

Jinming

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