The "plist" abbreviation goes back to at least 1958 as it was used in
the Lisp implementation [0]. And it may even predate Lisp. I'm very
sure that what actually went into a plist has often changed over the
years, but the name persists.
Lisp also used "association lists" [1] which were a key
in 793617 20180511 072806 Steven D'Aprano
wrote:
>On Fri, 11 May 2018 07:20:36 +, Bob Martin wrote:
>
>> in 793605 20180511 044309 T Berger wrote:
>>>On Saturday, May 5, 2018 at 6:45:46 PM UTC-4, MRAB wrote:
On 2018-05-05 17:57, T Berger wrote:
> What does the "p" in "plist" stand
Steven D'Aprano wrote:
But that's not where plists came from, was it? As I understand it, the
plist data format was invented by Apple, and they called it a property
list.
The term "property list" can also refer to a data structure in Lisp:
https://www.cs.cmu.edu/Groups/AI/html/cltl/clm/node10
On Fri, 11 May 2018 07:20:36 +, Bob Martin wrote:
> in 793605 20180511 044309 T Berger wrote:
>>On Saturday, May 5, 2018 at 6:45:46 PM UTC-4, MRAB wrote:
>>> On 2018-05-05 17:57, T Berger wrote:
>>> > What does the "p" in "plist" stand for? Is there a python glossary
>>> > that spells out the
in 793605 20180511 044309 T Berger wrote:
>On Saturday, May 5, 2018 at 6:45:46 PM UTC-4, MRAB wrote:
>> On 2018-05-05 17:57, T Berger wrote:
>> > What does the "p" in "plist" stand for?
>> > Is there a python glossary that spells out the meanings of abbreviated
>> > terms?
>> >
>> "plist" is "pro
On Saturday, May 5, 2018 at 6:45:46 PM UTC-4, MRAB wrote:
> On 2018-05-05 17:57, T Berger wrote:
> > What does the "p" in "plist" stand for?
> > Is there a python glossary that spells out the meanings of abbreviated
> > terms?
> >
> "plist" is "property list". It's listed in the Python documentat
On 2018-05-05 17:57, T Berger wrote:
What does the "p" in "plist" stand for?
Is there a python glossary that spells out the meanings of abbreviated terms?
"plist" is "property list". It's listed in the Python documentation.
--
https://mail.python.org/mailman/listinfo/python-list
On 03/12/17 18:32, John Yeung wrote:
> In the custom installation options for Python 3.6, what *exactly* does "Add
Python to environment variables" mean?
>
> Which environment variables are we talking about? I imagine one of them would
have to be PATH. Are there any others?
If the note on the "Pr
On 03/12/17 18:32, John Yeung wrote:
> In the custom installation options for Python 3.6, what *exactly* does "Add
> Python to environment variables" mean?
>
> Which environment variables are we talking about? I imagine one of them would
> have to be PATH. Are there any others?
If the note on
On Tue, 5 Sep 2017 03:37 am, Rustom Mody wrote:
> My understanding is that the OP saw a 'for' inside a '[]' and wondered
> "WTF is this?"
Rustom, did you not notice that the OP seemed to understood the 'for' perfectly
well, but asked what the meaning of the [ ] delimiters is? He explicitly says:
On Monday, September 4, 2017 at 10:42:47 PM UTC+5:30, Rick Johnson wrote:
> On Monday, September 4, 2017 at 9:27:23 AM UTC-5, Rustom Mody wrote:
> > On Monday, September 4, 2017 at 6:36:11 PM UTC+5:30, Ben Bacarisse wrote:
> > > Rustom Mody writes:
> > >
> > > > On Sunday, September 3, 2017 at 5:
On Monday, September 4, 2017 at 9:27:23 AM UTC-5, Rustom Mody wrote:
> On Monday, September 4, 2017 at 6:36:11 PM UTC+5:30, Ben Bacarisse wrote:
> > Rustom Mody writes:
> >
> > > On Sunday, September 3, 2017 at 5:10:13 PM UTC+5:30, Rick Johnson wrote:
> > >> Andrej Viktorovich wrote:
> > >> > I s
On Monday, September 4, 2017 at 7:57:23 PM UTC+5:30, Rustom Mody wrote:
> On Monday, September 4, 2017 at 6:36:11 PM UTC+5:30, Ben Bacarisse wrote:
> > But [p for p in sys.path] is a list and "set-builder" notation is used
> > for sets. Order is crucial for sys.path. You say exactly that below so
On Monday, September 4, 2017 at 6:36:11 PM UTC+5:30, Ben Bacarisse wrote:
> Rustom Mody writes:
>
> > On Sunday, September 3, 2017 at 5:10:13 PM UTC+5:30, Rick Johnson wrote:
> >> Andrej Viktorovich wrote:
> >> > I suppose p becomes array of strings but what [] means in this statement?
> >>
> >>
Rustom Mody writes:
> On Sunday, September 3, 2017 at 5:10:13 PM UTC+5:30, Rick Johnson wrote:
>> Andrej Viktorovich wrote:
>> > I suppose p becomes array of strings but what [] means in this statement?
>>
>> Generally, it's an inline form of writing a loop that returns a
>> list. There are othe
On Mon, 4 Sep 2017 01:36 pm, Rustom Mody wrote:
> Tsk tsk the confusioning continues
Rustom, it is generally considered that we should do our best to *reduce*
confusion, not increase it. *wink*
> Rewrite
> [p for p in sys.path]
> as
> [p | p ∈ sys.path]
>
> Is that clearer?
No. What is "|" in
On Sunday, September 3, 2017 at 5:10:13 PM UTC+5:30, Rick Johnson wrote:
> Andrej Viktorovich wrote:
> > I suppose p becomes array of strings but what [] means in this statement?
>
> Generally, it's an inline form of writing a loop that returns a list. There
> are other types as well.
Tsk tsk th
Andrej Viktorovich wrote:
> I suppose p becomes array of strings but what [] means in this statement?
Generally, it's an inline form of writing a loop that returns a list. There are
other types as well.
https://docs.python.org/3/tutorial/datastructures.html#list-comprehensions
--
https://mail.p
Andrej Viktorovich wrote:
> Hello,
>
> Trying to understand command:
> [p for p in sys.path]
>
> It prints array of paths. I suppose p becomes array of strings but what []
> means in this statement?
This is called "list comprehension", and
paths = [p for p in sys.path if "foo" in p]
is roughl
On Friday, February 6, 2015 at 6:40:23 PM UTC+5:30, Devin Jeanpierre wrote:
> Sorry for late reply, I somehow missed this email.
>
> On Thu, Feb 5, 2015 at 8:59 AM, Rustom Mody wrote:
> > The reason I ask: I sorely miss haskell's pattern matching in python.
> >
> > It goes some way:
> >
> ((x
On Friday, February 6, 2015 at 6:40:23 PM UTC+5:30, Devin Jeanpierre wrote:
> Sorry for late reply, I somehow missed this email.
>
> On Thu, Feb 5, 2015 at 8:59 AM, Rustom Mody wrote:
> > The reason I ask: I sorely miss haskell's pattern matching in python.
> >
> > It goes some way:
> >
> ((x
Sorry for late reply, I somehow missed this email.
On Thu, Feb 5, 2015 at 8:59 AM, Rustom Mody wrote:
> The reason I ask: I sorely miss haskell's pattern matching in python.
>
> It goes some way:
>
((x,y),z) = ((1,2),3)
x,y,z
> (1, 2, 3)
>
> But not as far as I would like:
>
((x,y)
Chris Angelico wrote:
[] = x
# is equivalent to
try: next(iter(x))
except StopIteration: pass
else: raise ValueError("too many values to unpack (expected 0)")
It's a way of asserting that an iterator is exhausted!
But why disallow using () for the same thing? This
is a blatant case of outright
On Fri, Feb 6, 2015 at 12:12 PM, Devin Jeanpierre
wrote:
> Here's another example, one that still exists in Python 3:
>
[] = ''
() = ''
> File "", line 1
> SyntaxError: can't assign to ()
>
> The syntax explicitly blacklists (), but forgets to blacklist [].
So... this is actually a re
On Thu, Feb 5, 2015 at 8:08 AM, Ian Kelly wrote:
> On Thu, Feb 5, 2015 at 2:40 AM, Steven D'Aprano
> wrote:
>> Devin Jeanpierre wrote:
>>> On Wed, Feb 4, 2015 at 1:18 PM, Chris Angelico wrote:
[result] = f()
result
> 42
Huh, was not aware of that alternate syntax.
Devin Jeanpierre wrote:
On Wed, Feb 4, 2015 at 1:18 PM, Chris Angelico wrote:
On Thu, Feb 5, 2015 at 4:36 AM, Peter Otten <__pete...@web.de> wrote:
[result] = f()
result
Huh, was not aware of that alternate syntax.
Nor are most people. Nor is Python, in some places -- it seems like
peop
On 2015-02-05 09:08, Ian Kelly wrote:
> > Got an example where you can use a,b but not [a,b] or (a,b)?
>
> >>> def f(a, (b, c)):
> ... print a, b, c
> ...
Interesting. I knew that at one point you could do this with lambdas
but never thought to do it with regular functions. There are ti
On Thursday, February 5, 2015 at 10:15:29 PM UTC+5:30, Rustom Mody wrote:
> On Thursday, February 5, 2015 at 9:39:27 PM UTC+5:30, Ian wrote:
> > On Thu, Feb 5, 2015 at 2:40 AM, Steven D'Aprano wrote:
> > > Devin Jeanpierre wrote:
> > >
> > >> On Wed, Feb 4, 2015 at 1:18 PM, Chris Angelico wrote:
>
On 2015-02-05 08:45, Rustom Mody wrote:
> > >>> def f(a, (b, c)):
> > ... print a, b, c
>
> What the hell is that?!
> First I am hearing/seeing it.
> Whats it called?
"tuple parameter unpacking", removed in Py3
https://www.python.org/dev/peps/pep-3113/
-tkc
--
https://mail.python.org/ma
Tuple packing. No longer supported in Python 3, but in available in Python <= 2.
Skip
On Thu, Feb 5, 2015 at 10:45 AM, Rustom Mody wrote:
> On Thursday, February 5, 2015 at 9:39:27 PM UTC+5:30, Ian wrote:
>> On Thu, Feb 5, 2015 at 2:40 AM, Steven D'Aprano wrote:
>> > Devin Jeanpierre wrote:
>>
On Thursday, February 5, 2015 at 9:39:27 PM UTC+5:30, Ian wrote:
> On Thu, Feb 5, 2015 at 2:40 AM, Steven D'Aprano wrote:
> > Devin Jeanpierre wrote:
> >
> >> On Wed, Feb 4, 2015 at 1:18 PM, Chris Angelico wrote:
> >>> On Thu, Feb 5, 2015 at 4:36 AM, Peter Otten wrote:
> Another alternative i
On Thu, Feb 5, 2015 at 2:40 AM, Steven D'Aprano
wrote:
> Devin Jeanpierre wrote:
>
>> On Wed, Feb 4, 2015 at 1:18 PM, Chris Angelico wrote:
>>> On Thu, Feb 5, 2015 at 4:36 AM, Peter Otten <__pete...@web.de> wrote:
Another alternative is to put a list literal on the lefthand side:
>>
Devin Jeanpierre wrote:
> On Wed, Feb 4, 2015 at 1:18 PM, Chris Angelico wrote:
>> On Thu, Feb 5, 2015 at 4:36 AM, Peter Otten <__pete...@web.de> wrote:
>>> Another alternative is to put a list literal on the lefthand side:
>>>
>> def f(): yield 42
>>>
>>> ...
>> [result] = f()
>> res
On Wed, Feb 4, 2015 at 1:18 PM, Chris Angelico wrote:
> On Thu, Feb 5, 2015 at 4:36 AM, Peter Otten <__pete...@web.de> wrote:
>> Another alternative is to put a list literal on the lefthand side:
>>
> def f(): yield 42
>>
>> ...
> [result] = f()
> result
>> 42
>
> Huh, was not aware of
"ast" a écrit dans le message de
news:54d227ef$0$3292$426a7...@news.free.fr...
thanks for the answers
--
https://mail.python.org/mailman/listinfo/python-list
On Thu, Feb 5, 2015 at 4:36 AM, Peter Otten <__pete...@web.de> wrote:
> Another alternative is to put a list literal on the lefthand side:
>
def f(): yield 42
>
> ...
[result] = f()
result
> 42
Huh, was not aware of that alternate syntax.
> (If you're worried: neither the list nor
Rustom Mody wrote:
> Well its cryptic and confusing (to me at least)
> And is helped by adding 2 characters:
>
> (result,) = f()
>
> instead of
>
> result, = f()
Another alternative is to put a list literal on the lefthand side:
>>> def f(): yield 42
...
>>> [result] = f()
>>> result
42
(I
On 02/04/2015 07:04 AM, Chris Angelico wrote:
> On Thu, Feb 5, 2015 at 1:38 AM, Albert-Jan Roskam wrote:
>> I have also never seen this before, but perhaps this:
>>
> f = lambda: [42]
> result, = f()
> result
>> 42
>>
>> ... is slightly cleaner than this:
> result = f()[0]
> re
On Wednesday, February 4, 2015 at 8:14:29 PM UTC+5:30, Albert-Jan Roskam wrote:
> - Original Message -
>
> > From: Chris Angelico
> > Sent: Wednesday, February 4, 2015 3:24 PM
> > Subject: Re: meaning of: line, =
> >
> > On Thu, Feb 5, 2015 at 1:08 AM
On Thu, Feb 5, 2015 at 1:38 AM, Albert-Jan Roskam wrote:
> I have also never seen this before, but perhaps this:
>
f = lambda: [42]
result, = f()
result
> 42
>
> ... is slightly cleaner than this:
result = f()[0]
result
> 42
They're not technically identical. If the thing
- Original Message -
> From: Chris Angelico
> To:
> Cc: "python-list@python.org"
> Sent: Wednesday, February 4, 2015 3:24 PM
> Subject: Re: meaning of: line, =
>
> On Thu, Feb 5, 2015 at 1:08 AM, ast wrote:
>> I dont understand why there is a c
On Thu, Feb 5, 2015 at 1:08 AM, ast wrote:
> I dont understand why there is a comma just after line in the following
> command:
>
> line, = plt.plot(x, np.sin(x), '--', linewidth=2)
>
>
> I never saw that before
>
> Found here:
> http://matplotlib.org/examples/lines_bars_and_markers/line_demo_dash
You'll find some explanation here:
http://stackoverflow.com/questions/1708292/meaning-of-using-commas-and-underscores-with-python-assignment-operator
On Wed, Feb 4, 2015 at 12:08 PM, ast wrote:
> hello
>
> I dont understand why there is a comma just after line in the following
> command:
>
> line
On 10/29/2014 4:56 AM, ast wrote:
Consider the following to_bytes method from integer class:
int.to_bytes(length, byteorder, *, signed=False)
What doest the '*' in the arguments list means ?
If you go to the online doc index page for Symbols,
https://docs.python.org/3/genindex-Symbols.html
the
"Peter Otten" <__pete...@web.de> a écrit dans le message de
news:mailman.15291.1414574006.18130.python-l...@python.org...
A bare * indicates that the arguments that follow it are keyword-only:
ok, thx
--
https://mail.python.org/mailman/listinfo/python-list
ast wrote:
> Consider the following to_bytes method from integer class:
>
> int.to_bytes(length, byteorder, *, signed=False)
>
> What doest the '*' in the arguments list means ?
A bare * indicates that the arguments that follow it are keyword-only:
>>> def f(a, b=2, *, c=3):
... print("a =
On Sat, Dec 29, 2012 at 2:42 AM, Marco wrote:
> Hi all, in the documentation:
>
> http://docs.python.org/3.3/reference/lexical_analysis.html
>
> the escape sequence `\newline` is expained as "Backslash and newline
> ignored". What does it mean?
It means this:
>>> foo = "This is\
one string."
>>
Excerpts from Joey's message of Fri Jul 08 20:14:29 -0400 2011:
> the list generated by numpy is of form [ a+bi, c+di, ...]
>
> could anybody tell me the meaning of the coefficients a and b? I am
> very confused about fourier transform!
>
a+bi is a typical complex number. a is the real part, b i
48 matches
Mail list logo
