On Mon, 25 Apr 2011 16:26:37 -0700, Paul Rubin wrote:
> Chris Angelico writes:
>> results = [function() for function in actions]
>
> results = map(apply, actions)
Sadly not in Python 3, where map is lazy and you need to add a call to
list to make it equivalent to the list comp.
--
Steven
-
On Mon, Apr 25, 2011 at 3:28 PM, Thomas Rachel
wrote:
> Am 25.04.2011 16:29, schrieb Thomas Rachel:
>
>> or maybe even better (taking care for closures):
>>
>> function = bool
>> value = 'the well at the end of the world'
>> ## ...
>> actions.append(lambda val=value: function(val))
>> ## ...
>> fo
Chris Angelico writes:
> results = [function() for function in actions]
results = map(apply, actions)
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Am 25.04.2011 16:29, schrieb Thomas Rachel:
or maybe even better (taking care for closures):
function = bool
value = 'the well at the end of the world'
## ...
actions.append(lambda val=value: function(val))
## ...
for function in actions:
results.append(function())
Or yet even better:
class
On Tue, Apr 26, 2011 at 12:29 AM, Thomas Rachel
wrote:
> for function in actions:
> results.append(function())
Can this become:
results = [function() for function in actions]
Chris Angelico
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Am 10.04.2011 18:21, schrieb Mel:
Chris Angelico wrote:
Who would use keyword arguments with a function that takes only one arg
anyway?
It's hard to imagine. Maybe somebody trying to generalize function calls
(trying to interpret some other language using a python program?)
# e.g. input win
Mel wrote:
Python is a pragmatic language, so all the rules come pre-broken.
+1 QOTW
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Mel writes:
> Python is a pragmatic language, so all the rules come pre-broken.
+1 QOTW
--
\ “Science shows that belief in God is not only obsolete. It is |
`\also incoherent.” —Victor J. Stenger, 2001 |
_o__)
On 10-Apr-11 12:21 PM, Mel wrote:
Chris Angelico wrote:
Who would use keyword arguments with a function that takes only one arg
anyway?
It's hard to imagine. Maybe somebody trying to generalize function calls
(trying to interpret some other language using a python program?)
# e.g. input win
Chris Angelico wrote:
> Who would use keyword arguments with a function that takes only one arg
> anyway?
It's hard to imagine. Maybe somebody trying to generalize function calls
(trying to interpret some other language using a python program?)
# e.g. input winds up having the effect of ..
fun
On Sun, Apr 10, 2011 at 10:54 PM, candide wrote:
> Anyway, passing x as a keyword argument to the bool function appears to be
> very rare : i did a regexp search for about 3 source-code Python files
> (among them official Python source-code, Django, Sphinx, Eric source-code
> and many more sou
Le 08/04/2011 18:41, Benjamin Kaplan a écrit :
bool(x=5) is just passing the value 5 as the argument "x" to the function.
Anyway, passing x as a keyword argument to the bool function appears to
be very rare : i did a regexp search for about 3 source-code Python
files (among them offici
On 2011-04-09 23:15 , rusi wrote:
On Apr 10, 8:35 am, Grant Edwards wrote:
On 2011-04-09, Lie Ryan wrote:
On 04/09/11 08:59, candide wrote:
Le 09/04/2011 00:03, Ethan Furman a ?crit :
> bool([x])
dir([object])
Not very meaningful, isn't it ?
The error says it unambiguously, dir()
On Apr 10, 8:35 am, Grant Edwards wrote:
> On 2011-04-09, Lie Ryan wrote:
>
> > On 04/09/11 08:59, candide wrote:
> >> Le 09/04/2011 00:03, Ethan Furman a ?crit :
>
> >>> > bool([x])
> >> dir([object])
> >> Not very meaningful, isn't it ?
>
> > The error says it unambiguously, dir() does not tak
On 2011-04-09, Lie Ryan wrote:
> On 04/09/11 08:59, candide wrote:
>> Le 09/04/2011 00:03, Ethan Furman a ?crit :
>>
>>> > bool([x])
>> dir([object])
>> Not very meaningful, isn't it ?
>
> The error says it unambiguously, dir() does not take *keyword*
> arguments; instead dir() takes *position
Le 10/04/2011 01:22, Robert Kern a écrit :
No one is saying that every instance of "foo([arg])" in the docs means
that the given argument is named such that it is available for keyword
arguments. What people are saying is that for bool(), *that happens to
be the case*.
what a piece of luck!
On 2011-04-08 17:59 , candide wrote:
Le 09/04/2011 00:03, Ethan Furman a écrit :
> bool([x])
> Convert a value to a Boolean, using the standard truth testing
> procedure.
>
As you can see, the parameter name is 'x'.
OK, your response is clarifying my point ;)
I didn't realize that in the
On 04/09/11 08:59, candide wrote:
> Le 09/04/2011 00:03, Ethan Furman a écrit :
>
>> > bool([x])
>> > Convert a value to a Boolean, using the standard truth testing
>> > procedure.
>> >
>>
>> As you can see, the parameter name is 'x'.
>
>
> OK, your response is clarifying my point ;)
>
>
>
Le 09/04/2011 00:03, Ethan Furman a écrit :
> bool([x])
> Convert a value to a Boolean, using the standard truth testing
> procedure.
>
As you can see, the parameter name is 'x'.
OK, your response is clarifying my point ;)
I didn't realize that in the bool([x]) syntax, identifier x ref
candide writes:
> Le 08/04/2011 18:43, Ian Kelly a écrit :
> > In "bool(x=5)", "x=5" is also not an expression. It's passing the
> > expression "5" in as the parameter x, using a keyword argument.
>
> You are probably right but how do you deduce this brilliant
> interpretation from the wording g
candide wrote:
Le 08/04/2011 18:43, Ian Kelly a écrit :
In "bool(x=5)", "x=5" is also not an expression. It's passing the
expression "5" in as the parameter x, using a keyword argument.
>>
You are probably right but how do you deduce this brilliant
interpretation from the wording given in th
Le 08/04/2011 18:43, Ian Kelly a écrit :
"x=42" is an assignment statement, not an expression.
Right, I was confounding with C ;)
In fact, respect to this question, the documentation makes things
unambiguous :
-
In contrast to many other languages, not all language constru
candide wrote:
> About the standard function bool(), Python's official documentation
> tells us the following :
>
> bool([x])
> Convert a value to a Boolean, using the standard truth testing procedure.
>
> In this context, what exactly a "value" is referring to ?
>
> For instance,
> >>> x=42
> >
On Fri, Apr 8, 2011 at 10:26 AM, candide wrote:
x=42
bool(x=5)
> True
>
>
> but _expression_ :
>
> x=42
>
>
> has no value.
"x=42" is an assignment statement, not an expression.
In "bool(x=5)", "x=5" is also not an expression. It's passing the
expression "5" in as the parameter x,
On Fri, Apr 8, 2011 at 12:26 PM, candide wrote:
> About the standard function bool(), Python's official documentation tells us
> the following :
>
> bool([x])
> Convert a value to a Boolean, using the standard truth testing procedure.
>
>
> In this context, what exactly a "value" is referring to ?
About the standard function bool(), Python's official documentation
tells us the following :
bool([x])
Convert a value to a Boolean, using the standard truth testing procedure.
In this context, what exactly a "value" is referring to ?
For instance,
>>> x=42
>>> bool(x=5)
True
>>>
but _ex
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