revive a generator

[Dave Angel]

On 10/20/2011 10:09 PM, Yingjie Lan wrote:
> <snip>
>
> What if the generator is passed in as an argument 
> when you are writing a function? That is, the expression
> is not available? 
>
> Secondly, it would be nice to automatically revive it.
> For example, when another for-statement or other
> equivalent is applied to it.
>
> Yingjie
That last point would definitely be incompatible.  It's quite useful to 
be able to peel some values off a generator, then use a for loop to get 
the remainder.  Simplest example I can think of would be to read a file 
where the first line(s) represent header information, and the body is 
obtainable with a simple loop.  I wouldn't be surprised if the csv 
module does that.

Not arguing whether an explicit revival is useful or not.  Although as 
others have pointed out, not all generators could accomplish it, and in 
some cases not unambiguously.


-- 

DaveA