[Python-Dev] Wishlist: dowhile

[Bob Ippolito]

On Jun 13, 2005, at 10:20 PM, Greg Ewing wrote:

> Phillip J. Eby wrote:
>
>
>> By the way, whatever happened to "and while"?  i.e.:
>>
>>      while True:
>>          data = inp.read(blocksize)
>>      and while data:
>>          out.write(data)
>>
>
> My favourite version of this is
>
>    while:
>      data = inp.read(blocksize)
>    gives data:
>      out.write(data)

Well, we could always just make iterator factories for the common  
cases and stuff them in itertools.  I do need to use this pattern  
from time to time, but primarily for this exact use case, so an  
"itertools.readby" or the like would probably solve this problem for  
most people most of the time.

-bob