On Wed, Dec 22, 2010 at 12:13 AM, Stefaan Himpe wrote:
>> myfunction(lambda x: print 'Eat %s!' % x)
>>
>> and that would print 'Eat this!'.
>
> Ahm... :)
> You can't use print in lambda as it is a statement, not an expression (in
> python 2.x at least)
Yah, I know. I've corrected myself. But I gu
myfunction(lambda x: print 'Eat %s!' % x)
and that would print 'Eat this!'.
Ahm... :)
You can't use print in lambda as it is a statement, not an expression
(in python 2.x at least)
On Dec 21, 11:53 pm, cjrh wrote:
> Because Python's scoping rules are strict and clean, we can even do
> the following:
>
> my_list_of_functions = [lambda x, i=i : x + j for i in range(10)]
To my shame, this should have been:
my_list_of_functions = [lambda x, i=i : x + i for i in range(10)]
Apo
On Dec 21, 2010, at 1:37 PM, cjrh wrote:
>
> On Dec 21, 10:36 pm, pbreit wrote:
>> I see lambda used quite a bit and don't totally understand the concept. Is
>> there a simple rule to follow to know when it is necessary to use?
>
Another answer to the original question is that there are places
On Dec 21, 11:37 pm, cjrh wrote:
> def g(i):
> def f(x):
> return x + i
> return f
> my_list_of_functions = [g(i) for i in range(10)]
I suspect the following won't be of immediate use to you, but it is
worth hearing about right now, even if it'll only make sense sometime
later in
On Dec 21, 10:36 pm, pbreit wrote:
> I see lambda used quite a bit and don't totally understand the concept. Is
> there a simple rule to follow to know when it is necessary to use?
Code A:
f = lambda x,y: x + y
Code B:
def f(x,y):
return x + y
If you can remember that Code A is *exactly*
And if you're interested, the name "lambda" itself comes from lambda
calculus:
http://en.wikipedia.org/wiki/Lambda_calculus
http://en.wikipedia.org/wiki/Lambda_calculus#First-class_functions
http://en.wikipedia.org/wiki/Anonymous_functions
On Tuesday, December 21, 2010 4:02:36 PM UTC-5, stefa
pbreit wrote:
I see lambda used quite a bit and don't totally understand the concept.
Is there a simple rule to follow to know when it is necessary to use?
Sometimes you need to pass a function as an argument to another
function. In that case you have a choice to
1. define a separate functio
lambda is functional programming bit. :-)
Well, you can use lambda to
1) define anonymous functions
2) one liner functions
3) to modify a function to behave the way you want (instead of defining
another function that just call this function with desired params)
etc, to name just few, that came i
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