On Wed, Jul 13, 2016 at 2:20 PM, Paul Moore <p.f.moore@gmail.com> wrote:

Um, as someone significantly older than 10 years old, I don't know how
to type a lambda character on my Windows UK keyboard...

FWIW, in IPython/Jupyter notebooks one can type \lambda followed by a tab to get the λ character.  The difficulty of typing is a red herring.  Once it is a part of the language, every editor targeted at a Python programmer will provide the means to type λ with fewer than 6 keystrokes (6 is the number of keystrokes needed to type "lambda" without autocompletion.)  The unfamiliarity is also not an issue.  I am yet to meet a Python programer who knows what the keyword "lambda" is but does not know how the namesake Greek character looks.

I am +0 on this feature.  I would be +1 if λ was not already a valid identifier.

This is one of those features that can easily be ignored by someone who does not need it, but can significantly improve the experience of those who do.