subexpressions

[Terry Reedy]

"Sergey Dorofeev" <sergey at fidoman.ru> wrote in message 
news:f3oj68$1pb8$1 at news.rtcomm.ru...
| How to make x*x to be evaluated once?

Addendum to the answers already posted: In Python,

lambda params: expression

is an inline abbreviation for

def <lambda>(params): return expression

except that there is no external binding of the otherwise illegal 
.func_name '<lambda>'.  The resulting function objects are otherwise 
identical.

After years of discussion, Guido has decided to leave lambda alone for 3.0.
It will not be neither expanded, nor removed, nor renamed.

Terry Jan Reedy