On 8 January 2016 at 12:16, Daniel Krenn <kr...@aon.at> wrote:
> PPS: At the moment (not having answers to this posting), my favourite
> implementation would be something like
>    def is_constant(self):
>        return not self.variables()
>

To give an obvious counter-example:

   SR(random()).is_constant()

but perhaps easily remedied.

Bill Page.

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