What is "lambda x=x : ... " ?

Fredrik Lundh fredrik at pythonware.com
Thu Jan 10 19:59:23 CET 2008

Mike Meyer wrote:

>> What does "y=y" and "c=c" mean in the lambda function?
> Older versions of python didn't make variables in an outer scope
> visible in the inner scope. This was the standard idiom to work
> around that.

lexically scoped free variables and object binding are two different 
things, and have different semantics.  the former does not always 
replace the latter.


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