On 12/29/2013 12:33 PM, Steven D'Aprano wrote:
def adder_factory(n):
def plus(arg):
return arg + n
return plus # returns the function itself
If you call adder_factory(), it returns a function:
py> adder_factory(10)
.plus at 0xb7af6f5c>
What good is this? Watch carefully:
On 12/29/2013 01:38 PM, Steven D'Aprano wrote:
>In the previous timer function that I was using, it defined a timer class,
>and then I had to instantiate it before I could use it, and then it saved a
>list of timing results. I think in yours, it adds attributes to each
>instance of a function/met
Hah,I must understand,I read it that way!
>
> Oops, sorry a typo crept into this. That last line ought to be
> "return g(23)". Sorry for any confusion.
>
>
>
> --
> Steven
> ___
> Tutor maillist - Tutor@python.org
> To unsubscribe or change subscription
This is all really quite awesome, though I'm sure it'll be a while before
these are really available tools for me. I think I get(a bit more than) the
basic concept. Thanks!
> is a short-cut for this:
>
> def spam(n):
> return "spam"*n
>
> spam = decorator(spam)
>
>
> This may be a lot to diges
Wow Steven, this is great.I'll be brief I'm on a phone
> def f(x):
> print("Inside the outer function x =", x)
> def g(y): # a function nested inside another function
> print("Inside the inner function x =", x)
> print("Inside the inner function y =", y)
> return x
On Sun, Dec 29, 2013 at 10:33:15PM +1100, Steven D'Aprano wrote:
> def f(x):
> print("Inside the outer function x =", x)
> def g(y): # a function nested inside another function
> print("Inside the inner function x =", x)
> print("Inside the inner function y =", y)
>
Last one!
On Sun, Dec 29, 2013 at 01:57:31AM -0500, Keith Winston wrote:
> In the previous timer function that I was using, it defined a timer class,
> and then I had to instantiate it before I could use it, and then it saved a
> list of timing results. I think in yours, it adds attributes to eac
On Sun, Dec 29, 2013 at 01:57:31AM -0500, Keith Winston wrote:
> Also: in the timer function, it has a series of attribute assignments to
> 0/None after the inner function definition... from the behaviour, I assume
> those are applied once, the first time the timer function is called
> wrapping a
On Sun, Dec 29, 2013 at 01:57:31AM -0500, Keith Winston wrote:
> I don't really get the inner thing, I tried to look it up, but I don't
> think I found the right thing, just references to nested functions. I'd
> like to understand what I'm looking at better, but can't figure out what
> question to
On Sat, Dec 28, 2013 at 4:45 AM, Steven D'Aprano wrote:
> That's my idea of an instrumented function :-)
>
> Feel free to ask for a explanation of how it works.
>
Hey Steve or anyone: That seems like a very clean timer function, and while
I have it working I only understand it caricaturistically
On Sat, Dec 28, 2013 at 4:45 AM, Steven D'Aprano wrote:
> Anyway, if I'm going to criticise, I ought to show what I consider
> better. Here's a quick and unpolished decorator for instrumenting
> functions. For simplicity, it too will be inaccurate for Windows and
> really fast/small functions, but
On Fri, Dec 27, 2013 at 01:14:42PM -0500, Keith Winston wrote:
> I am beginning to think about decorators, generators, and the like.
[...]
> Here's the code, stolen without apology from here:
> http://enja.org/2011/03/09/a-python-function-timing-decorator/
>
> import time
>
> class Timing(object)
On Fri, Dec 27, 2013 at 07:16:22PM +, Oscar Benjamin wrote:
> The next method of iterators was renamed __next__ in Python 3. So if you
> change it to self.col.__next__() it will work in Python 3. Neither of those
> is really correct though. The correct method is to call the next built-in:
>
On Fri, Dec 27, 2013 at 01:22:03PM -0500, Keith Winston wrote:
> Finally: this isn't really a Python issue I don't think, but when I cut &
> paste code from the web page above (in Firefox in Linux 16 XFCE) and paste
> it into the IDLE New File window, it cleans out all the white space, which
> is
On Dec 27, 2013 6:24 PM, "Keith Winston" wrote:
>
> I am beginning to think about decorators, generators, and the like. I'm
starting from zero. I've read a few PEPs, and looked at some code, and
maybe things are starting to sink in, though I don't really have enough
framework to hang it all on. It
I am beginning to think about decorators, generators, and the like. I'm
starting from zero. I've read a few PEPs, and looked at some code, and
maybe things are starting to sink in, though I don't really have enough
framework to hang it all on. It'll come. Anyway, I was trying to run some
timing cod
Also: it works fine (in it's original form, before I changed the print
statements) in 2.7, so I'm reinforced in my thinking that it's a 3.3 issue
(well, a changed syntax issue).
Finally: this isn't really a Python issue I don't think, but when I cut &
paste code from the web page above (in Firefo
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