generator object or 'send' method?

[Terry Reedy]

Aaron Brady wrote:
> Hello,
> 
> I am writing a generator to return a sequence of numbers with some
> variation.  The parameters of the variation can be changed by the
> caller, even after the generator is started.  My question is, is it
> better to wrap the generator in an object, so that the parameters can
> be changed just by an attribute access?

Rather than wrap a generator, I would just write an iterator class.
A generator function is basically an abbreviated class statement.  (The 
abbreviation is the removal of boilerplate code.)

 > Or keep the generator clear, and modify parameters with a 'send' call?

If I were modifying a single parameter and wanted the next value 
returned immediately upon sending, I would do this.

> P.S.  It would receive the 'send' from a different point in control
> flow than its usual 'next'.  Should it repeat a value if it receives a
> 'send'?  Or should I wrap it in a secondary 'trap_send_and_repeat'
> generator?

But for this I would go with the class.  Pretty foolproof.

tjr