Draft Pep (was: Re: Let's Talk About Lambda Functions!)
tim.one at comcast.net
Mon Aug 5 05:28:59 CEST 2002
> The rumour states that Guido regrets having added `lambda' to Python.
> I guess it goes beyond the mere `lambda' keyword: it is reasonable to
> think that what Guido regrets is the addition of anonymous functions.
It's more than a rumor, but is open to Interpretation (I guess ...). At the
end of the "lightning talks" at OSCON last month, Guido gave a brief talk on
"Python Regrets". The slides are here:
The fourth slide begins:
Lambda and functional stuff
I've never liked lambda
crippled (only one expression)
confusing (no argument list parentheses)
can use a local function instead
I suppose you can read that as saying he thought lamba was a peachy idea
that just didn't go far *enough*, but that stretches credulity for me.
Whenever these come up, lambda gets lumped in with "functional stuff",
meaning the filter/map/reduce functions that went in with the same patch
that implemented lambda (and regrets about which fill the remainder of this
> If the rationale is essentially reduced to the vague statement of a
> "continuous interest", it is a pretty weak rationale. Before anything
> else, the rationale should stress, in very convincing ways, why anonymous
> functions should grow stronger in Python, instead of being faded out.
I'm staying out of this round, except <wink> to note that the only example
in the PEP:
x = (
def (x, y):
would be clearer written:
def x(x, y):
People slinging GUI callbacks for a living could surely contribute more
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