tuple to list to tuple conversion

[Erik Max Francis]

Vinoo vasudevan wrote:

> params is already a tuple. I needed to add a few more parameters
> inside 'mymethod' so I
> did this:
> params = tuple((list(params)).append(something))
> when params is an empty tuple to begin with, the stmt sets it to None
> instead of
> (something, )

Isaac Carroll pointed out a better way to do this.  The reason that
you're having this problem here is because append is a method which
modifies the object in place; it does not return anything.  (Your code
example is also illegal; you show it appending to a tuple which is
illegal.)

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