[Python-Dev] Examples for PEP 572

Rob Cliffe rob.cliffe at btinternet.com
Wed Jul 4 14:20:51 EDT 2018

On 04/07/2018 02:54, Terry Reedy wrote:
> The 2-argument form of iter is under-remembered and under-used. The 
> length difference is 8.
>     while (command := input("> ")) != "quit":
>     for command in iter(lambda: input("> "), "quit"):
A general principle that Chris Angelico has repeatedly mention applies 
here:  If you want (as I instinctively would)
     while (command := input("> ")).lower() != "quit":
you can't express that in your iter version.
Rob Cliffe

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