se for their functions or not. Sometimes it
will, and sometimes it won't.
The only new part here is the idea that we could streamline the code in the
caller if "raise None" was a no-op. Instead of writing this:
exc = _validate(x)
if exc is not None:
raise exc
we could write:
raise _validate(x)
which would make this idiom more attractive.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Fri, 1 Jan 2016 10:25 am, Mark Lawrence wrote:
> Congratulations for writing up one of the most overengineered pile of
> cobblers I've ever seen.
You should get out more.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
se ValueError("invalid string")
This will probably be slower for small strings, but faster for HUGE strings
(tens of millions of characters). But I expect it will be fast enough.
It is simple enough to skip tabs as well as spaces. Easiest way is to match
on any whitespace:
regex = re.compile(r'\w*\[\w*\{')
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
the more
entertaining of our cranks (not mentioning any names, but we know who they
are...), may 2016 be a better year than 2015 for us all.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
ub_monoculture.html
Oh, and talking about DVCS:
https://bitquabit.com/post/unorthodocs-abandon-your-dvcs-and-return-to-sanity/
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
mpy.newaxis.
http://docs.scipy.org/doc/numpy/reference/arrays.indexing.html
In this case, w_A[:, None] returns a "view" of the original w_A array.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Sun, 3 Jan 2016 12:18 pm, Skybuck Flying wrote:
> Should be easy to turn that somewhat pseudo code into python code ! :)
If it is so easy, why won't you do it?
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
This may entirely be a red herring, but if it were my code,
I'd try replacing that last line with:
reply_cids.extend(extract_reply_cids(html))
and see if it makes any difference. If it doesn't, you can keep the new
version or revert back to the version using +=, entirely up to y
n error:
py> yy = map(sum, [13, 22, 33, 41])
Traceback (most recent call last):
File "", line 1, in
TypeError: 'int' object is not iterable
Try replacing the list-of-mystery-things with a list of lists:
map(sum, [[1, 2, 3], [4, 5, 6], [7, 8, 9]])
and see what you get.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Mon, 4 Jan 2016 02:31 pm, Chris Angelico wrote:
> On Mon, Jan 4, 2016 at 2:04 PM, Rustom Mody wrote:
>> On Thursday, December 31, 2015 at 9:05:58 PM UTC+5:30, Steven D'Aprano
>> wrote:
>>> But I think it is a real issue. I believe in beautiful tracebacks tha
quot;, line 1425, in CHECK_BINOP
TypeError: unsupported operand type(s) for +: 'int' and 'list'
When you open that ticket, be so good as to add me to the Nosy list.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Fri, 1 Jan 2016 09:48 am, Chris Angelico wrote:
> On Fri, Jan 1, 2016 at 7:18 AM, Ben Finney
> wrote:
[...]
>> As best I can tell, Steven is advocating a way to obscure information
>> from the traceback, on the assumption the writer of a library knows that
>>
e, then create N threads, where N will need
to be determined by experiment, but will probably be something like 4 or 8,
and let each thread pop a request from the queue as needed.
Are you experienced with threads? Do you need further information about
using threads and queues?
--
S
just want to download
things in a rush.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Wednesday 06 January 2016 10:25, Thomas 'PointedEars' Lahn wrote:
> Robert wrote:
>
>> I just wonder that the cmd line function sum may be different from the
>> .py file used. One is numpy package, the other is a general one. Then,
>> how can I further make it clear for this guess?
>
> Among
On Wednesday 06 January 2016 07:37, John Gordon wrote:
> The built-in function sum() returns a single value, not a list, so this
> is a reasonable error.
Not quite. It depends on what arguments you give it.
py> a = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
py> sum(a, [])
[1, 2, 3, 4, 5, 6, 7, 8, 9]
Bu
On Wednesday 06 January 2016 07:25, Robert wrote:
> Why is there difference between cmd line and .py file?
Almost certainly because you are not running exactly the same code each
time.
> I run below code, which is downloaded from link:
Your code fails on the first line with
NameError: n
https://hmmlearn.github.io/hmmlearn/generated/hmmlearn.hmm.GaussianHMM.html
It has a sample method here:
https://hmmlearn.github.io/hmmlearn/generated/hmmlearn.hmm.GaussianHMM.html#hmmlearn.hmm.GaussianHMM.sample
You should try googling for help before asking questions:
https://duckduckgo.com/ht
you could also try this:
py> __a = 1
py> class Test:
... def method(self):
... x = eval("__a")
... print(x)
...
py> Test().method()
1
But don't do that.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Sat, 9 Jan 2016 03:16 am, Chris Angelico wrote:
> On Sat, Jan 9, 2016 at 3:07 AM, Steven D'Aprano
> wrote:
>> If you absolutely insist that you must must must continue to use a double
>> underscore name, you could also try this:
>>
>> py> __a = 1
>>
ey. You still have to obey the licence.
- But if there are special conditions that apply to you, it doesn't
hurt for you to ask for a special licence. The worst that will happen
is that they will ignore you, or say no.
And finally:
- Check with your lawyer.
--
Steven
--
https
ype]
>
> Specifically, could you explain the meaning of
>
> {
> ...}[cov_type]
>
> to me?
It is a dictionary lookup. { ... } sets up a dictionary with keys
'spherical'
'tied'
'diag'
'full'
then { ... }[cov_type]
ckup. Also, you should make sure you scan your
system for viruses (possibly you have a randsomware virus encrypting files
behind your back) and do a disk check in case the disk is dying.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
he ENTIRE traceback, starting from the line:
Traceback (most recent call last)
to the end of the error message. This will (hopefully) show us which line of
your code caused the error.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
s, but
sometimes classes will make problems easier to solve. And sometimes classes
make problems harder to solve. It depends on the problem.
This may help you:
http://kentsjohnson.com/stories/00014.html
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
are running code which is different from what you
have posted here. Perhaps your ACTUAL code (not the pretend code you showed
us) includes a try...except block like this:
try:
some code goes here
except Exception as err:
print(err)
sys.exit()
or similar. If so, TAKE IT OUT. That is destroying useful debugging
information and making it more difficult to solve your problem.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
e, class, method, attribute or variable, you can assume that it is
private (unless explicitly documented otherwise) and avoid it.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
t; for the underlying mechanism that allows this to work.
(Warning: descriptors are considered very advanced material.)
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Tue, 12 Jan 2016 08:54 am, Saran Ahluwalia wrote:
> Hi Steven:
>
> Just as an update - apparently there were bytes in the Windows Command
> Terminal that were interrupting the process execution. I didn't realize
> this was happening until I dug around Windows' Q&
There are no words to explain just how broken everything is. This post
tries:
https://medium.com/message/everything-is-broken-81e5f33a24e1
but barely covers even a fraction of the breakage.
Thanks goodness for anti-virus, right?
One of the leading anti-virus vendors in the world, TrendMicro, h
he comma after "item".
The comma turns the assignment into sequence unpacking. Normally we would
write something like this:
a, b, c, d = four_items
but you can unpack a sequence of one item too. If you really want to make it
obvious that the comma isn't a typo:
(item,) = d.values()
py> next(iter(d.values()))
'value'
> This resembles a list just too much, making the coder's intent harder
> to understand. This is **very** subjective, of course.
I'm sorry, I don't understand what you mean by "resembles a list"? What
does? In what way?
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
ot Java:
http://dirtsimple.org/2004/12/python-is-not-java.html
And Java is not Python either:
http://dirtsimple.org/2004/12/java-is-not-python-either.html
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
(he never seems to care about Asians or other non-Latin
based characters, only French and other European ones) and that this small
performance decrease shows that Python can't do Unicode.
I think that is fair to say that he is what the English call "a nutter".
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Wednesday 13 January 2016 14:36, Rustom Mody wrote:
> 1. Python the LANGUAGE, is rather even-handed in paradigm choice: Choose
> OO, imperative, functional or whatever style pleases/suits you
> 2. Python LIBRARIES however need to make committing choices. Users of
> those then need to align wit
Quote:
With the end of support for Python 2 on the horizon (in 2020),
many package developers have made their packages compatible
with both Python 2 and Python 3 by using constructs such as:
if sys.version_info[0] == 2:
# Python 2 code
else:
# P
On Thu, 14 Jan 2016 02:23 am, Eddy Quicksall wrote:
> What list do I use for building issues? I'm building 3.5.1.
You can ask here.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
nge from 2.5 to 2.6. (I
bet most people don't even know that 2.6 broke backwards-compatibility.)
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Thu, 14 Jan 2016 07:47 am, Laura Creighton wrote:
>
> I fell recently. Ought to be nothing, [...]
Ouch! Much ouch!
Hope you get well soon Laura! My best wishes and sympathies to you!
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
ving the response which I'm having right now:
"I don't think it's Laura who is high on drugs, prescription
or otherwise, but you!"
:-)
Seriously, sorry for being That Guy who asks you to analyse what I expect is
meant as a joke, but I have no idea where the humour is.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
t; that will read your credit card number as you type it and then fire it
> off to be stored on my server before you've even hit the Submit
> button.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
different domains, each more and more
dodgy-looking than the last. And that's just the "legitimate" (for some
definition of) scripts.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Thu, 14 Jan 2016 11:40 am, Bernardo Sulzbach wrote:
> On Wed, Jan 13, 2016 at 10:10 PM, Steven D'Aprano
> wrote:
>> (...) 4.0 (assuming there is one)
>
> Isn't it just a matter of time? Do you think it is even possible not
> to have Python 4 eventually?
3.
On Thursday 14 January 2016 17:27, Frank Millman wrote:
> So my test was -
>
> except ValueError as e:
> if str(e).startswith('need'):
> # 0 rows returned
> else:
> # > 1 rows returned
>
> This has worked for years, but with 3.5 it stopped working. It took me a
> while to
On Thursday 14 January 2016 14:29, Rick Johnson wrote:
> On Wednesday, January 13, 2016 at 9:08:40 PM UTC-6, Chris Angelico wrote:
>> You're talking about a very serious matter between two legal entities
>> - if someone was *fired* because of social, technological, or other
>> problems with Python
On Fri, 15 Jan 2016 02:30 am, Rick Johnson wrote:
> I represent
Absolutely nobody except yourself.
The entertainment value of your trolling has now dipped below the annoyance
value. Into the sin-bin you go for another three months. Enjoy your time in
the kill-file.
--
Steven
--
ht
quot;best practice" any more, but you can still
learn something from them.)
At the interactive interpreter, read the Zen of Python:
import this
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
llo'
py> "goodbye" or "hello"
'goodbye'
py> "" or "something"
'something'
Think of `or` as the following:
- if the first string is the empty string, return the second string;
- otherwise always return the first string.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
outs."
message = random.choice(["", "I like boiled cabbage."])
print( message or default )
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
problem,
instead of talking in vague generalities, we might be able to suggest a
solution.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
Are you sure that the problem is with print and not the
conversion?
Again, your question is little more than some vague generalities with no
real detail.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
20;j++){}
> return 1
> }
js> j
js: "", line 13: uncaught JavaScript runtime exception:
ReferenceError: "j" is not defined.
at :13
js> a()
1
js> j
10
js> b()
1
js> j
20
And this is the language that 95% of the Internet uses... my brain hurts.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
https://pbs.twimg.com/media/CWgV0ruUsAAcUD7.jpg
--
Steve
--
https://mail.python.org/mailman/listinfo/python-list
On Monday 18 January 2016 17:15, Ankur Agrawal wrote:
> I am trying to catch Abort exception. When I use fabric's run(...) method,
> the host it tries to connect is not available and so it aborts with
> connect time out exception. I am not able to catch it. Following is a two
> different ways of c
ssion:
100 loops, best of 3: 0.965 usec per loop
100 loops, best of 3: 0.914 usec per loop
100 loops, best of 3: 0.981 usec per loop
100 loops, best of 3: 0.931 usec per loop
So there's plenty of random variation in the times.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Tue, 19 Jan 2016 09:24 pm, Oscar Benjamin wrote:
> On 19 Jan 2016 10:16, "Steven D'Aprano" wrote:
>>
>> [steve@ando ~]$ python -m timeit -s "from collections import deque"
>> -s "it = iter([i for i in xrange(1000)])" "deque(it
x27;t mean attribute foo
exists. I can use attribute syntax to look up an attribute that doesn't
exist, and Python will raise AttributeError.
The question is, perhaps that attribute gets created elsewhere. You would
need to read all the source code, or read the documentation, to see where
and u
On Thursday 21 January 2016 12:26, Travis Griggs wrote:
> I wrote a simple set of python3 files for emulating a small set of mongodb
> features on a 32 bit platform. I fired up PyCharm and put together a
> directory that looked like:
>
> minu/
> client.py
> database.py
> collection.py
On Thursday 21 January 2016 15:00, Robert wrote:
> Hi,
>
> I read below code snippet on link:
> https://docs.python.org/2/library/functions.html#property
Property docstrings are hard to get to. But with the class C you gave, this
works in the interactive interpreter:
help(C.__dict__['x'])
dis
ible difference between the first and second method. The third
method, using functools.partial, is considerably faster, BUT remember that
this only effects the time it takes to call the function g(). If g()
actually does any work, the time spent doing the work will *far* outweigh
the overhead of calling the function.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
ion with truncation towards zero.
n = a//b
if (a < 0) != (b < 0):
n += 1
return n
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
an only import
them from where they actually exist.
from math import path # fails, because there is no math.path
from os import path # succeeds, because os.path does exist
You can't import int.hexdump if you haven't written a file int/hexdump.py.
> I have these function definitions:
>
> codec/objects.py:47:def hexdump (s, l = None):
> int/struct_phy.py:26:def hexdump (s, l = None):
>
> both in modules.
>
> It fails to load:
>
> from struct_phy import hexdump
>
> or:
>
> from int.struct_phy import hexdump
> ImportError: cannot import name hexdump
At this point, I'm so confused by your setup that I'm about to give up and
go to bed.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
If you run
from utilities import hexdump
and Python gives you an ImportError, the most likely issue is that there is
no such name "hexdump" in that file.
Are you sure you are looking at the same file? What does this tell you?
import utilities
print(utilities.__file__)
Does it
a = 3**1000 * 2
py> b = 3**1000
py> float(a)/b # Exact answer should be 2
Traceback (most recent call last):
File "", line 1, in
OverflowError: long int too large to convert to float
Note that Python gets the integer division correct:
py> a//b
2L
And even gets tru
On Sat, 23 Jan 2016 09:02 pm, [email protected] wrote:
> However I need to put the code on one single line.
Why? Is the Enter key on your keyboard broken?
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Sun, 24 Jan 2016 12:19 am, Chris Angelico wrote:
> On Sun, Jan 24, 2016 at 12:07 AM, Steven D'Aprano
> wrote:
>> On Sat, 23 Jan 2016 09:02 pm, [email protected] wrote:
>>
>>> However I need to put the code on one single line.
>>
>> Why? Is the Enter
On Sunday 24 January 2016 11:27, Robert James Liguori wrote:
> Is there a python library to calculate longitudinal acceleration, lateral
> acceleration and normal acceleration?
Calculate acceleration of what?
I think we need some more detail before we can give a sensible answer, but
you could t
Second attempt.
On Sunday 24 January 2016 11:27, Robert James Liguori wrote:
> Is there a python library to calculate longitudinal acceleration, lateral
> acceleration and normal acceleration?
Calculate acceleration of what?
I think we need some more detail before we can give a sensible answer
if you use the wrong sigil, and then I
get confused. Is there a good discussion of how names and references work
in Perl, equivalent to Ned's discussion?
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
at,
or perhaps finding a better tutorial that actually bothers to mention what
it needs to run.
(You have read the tutorial from the beginning, yes?)
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
ogramming* is introduced before classes.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Sat, 30 Jan 2016 09:47 am, Ben Finney wrote:
> Steven D'Aprano writes:
>
>> You should have started with the official tutorial:
>>
>> https://docs.python.org/2/tutorial/
>
> And these days the default recommendation should be to start with the
> of
On Sunday 31 January 2016 09:47, Sven R. Kunze wrote:
> @all
> What's the best/standardized tool in Python to perform benchmarking?
timeit
--
Steve
--
https://mail.python.org/mailman/listinfo/python-list
On Sunday 31 January 2016 09:18, Gregory Ewing wrote:
> Rustom Mody wrote:
>> 1. One can use string-re's instead of compiled re's
>
> And I gather that string REs are compiled on first use and
> cached, so you don't lose much by using them most of the
> time.
Correct. The re module keeps a cache
gate class.
Pick whichever is more relevant to your specific situation.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
elf.get_class(li_item, 'vip'))
price_dollar = self.get_text(
self.get_class(li_item, 'lvprice prc'))
bids = self.get_text(
self.get_class(li_item, 'lvformat')
time_hrs = self.get_time(self.get_class(li_item, 'tme'))
shipping = self.get_shipping(
self.get_class(li_item, 'lvshipping')
print('{} {} {} {} {}'.format(
link, price_dollar, time_hrs, shipping, bids))
print('-'*70)
Obviously I haven't tested this code.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Sun, 31 Jan 2016 02:48 pm, Cameron Simpson wrote:
> I have. I've got one right here. It happens to be in perl, but it has been
> in need of a recode in Python for a long time. It has about 3000 regexps.
Wow. What's the code do?
--
Steven
--
https://mail.python.org/mailman
On Sun, 31 Jan 2016 08:40 pm, Chris Angelico wrote:
> On Sun, Jan 31, 2016 at 8:21 PM, Steven D'Aprano
> wrote:
>> Hmmm. Well, I've never used lxml, but the first obvious problem I see is
>> that your lines:
>>
>> description = li_item.find_c
something_complex:
handler-call for id 5 {'something_complex': }
one_id: 5 something_complex:
handler-call for id 4 {'something_complex': }
one_id: 4 something_complex:
handler-call for id 3 {'something_complex': }
one_id: 3 something_complex:
handler-call for id 2 {'something_complex': }
one_id: 2 something_complex:
handler-call for id 1 {'something_complex': }
one_id: 1 something_complex:
7 is in
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
Hi Ryan, and welcome!
On Tuesday 02 February 2016 06:30, Ryan Young wrote:
> I am new to Python but have known Java for a few years now. With python,
> so far, so good! I created a simple calculator to calculate the total cost
> of a meal. My variables were tip tax total and order. I am confused
On Tuesday 02 February 2016 06:32, Sven R. Kunze wrote:
> On 31.01.2016 02:48, Steven D'Aprano wrote:
>> On Sunday 31 January 2016 09:47, Sven R. Kunze wrote:
>>
>>> @all
>>> What's the best/standardized tool in Python to perform benchmarking?
>> t
MySQL, **especially** if you need to
support non-ASCII (Unicode) data.
But really, to decide which would be best for you, we would need to know a
lot more about your application and its requirements.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
range(6, -1, -1):
d=date.today() - timedelta(i)
t = d.year, d.month, d.day
date_list.append(t)
return date_list
Because this function returns an actual list, there is no need to call
list() on the result.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
ld_dict are just two names for the one dict.
In general, mutator functions and methods should not return the object they
just mutated, unless there is a good reason to do so (e.g. decorators).
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
possibly AOL
(if there is anyone on AOL who knows how to send email). Yahoo and AOL do
not interact well with mailing lists. As they say on the mailman mailing
list, "Friends don't let friends use Yahoo email addresses."
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
your code? Somebody
else's code? A library? Which library? What do they do? Where are they
from?
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Sunday 07 February 2016 14:02, INADA Naoki wrote:
> Python 3 is a disaster because of incompatibility with Python 2.
How is that a disaster? What is your criteria for deciding what is, and
isn't, a disaster?
According to TIOBE, Python's popularity continues to grow:
http://www.tiobe.com/ind
On Tuesday 09 February 2016 02:11, Chris Angelico wrote:
> That's fine for comparing one file against one other. He started out
> by saying he already had a way to compare files for equality. What he
> wants is a way to capitalize on that to find all the identical files
> in a group. A naive appro
> easily be _more_.
Yep. Back in the early days, interned strings were immortal and lasted
forever. That wasted memory, and is no longer the case.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
', buffering=40*M) as f:
and see whether that helps.
By the way, do you need a cryptographic checksum? sha256 is expensive to
calculate. If all you are doing is trying to match files which could have
the same content, you could use a cheaper hash, like md5 or even crc32.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Monday 15 February 2016 11:17, Herman wrote:
> I want to pass in the key to the default_factory of defaultdict
Just use a regular dict and define __missing__:
class MyDefaultDict(dict):
def __missing__(self, key):
return "We gotcha key %r right here!" % key
If you want a per-in
On Monday 15 February 2016 11:08, Ben Finney wrote:
> I am unconcerned with whether there is a real filesystem entry of that
> name; the goal entails having no filesystem activity for this. I want a
> valid unique filesystem path, without touching the filesystem.
Your phrasing is ambiguous.
If y
On Monday 15 February 2016 12:19, Ben Finney wrote:
> One valid filesystem path each time it's accessed. That is, behaviour
> equivalent to ‘tempfile.mktemp’.
>
> My question is because the standard library clearly has this useful
> functionality implemented, but simultaneously warns strongly aga
On Tuesday 16 February 2016 00:05, Veek. M wrote:
> When I do at the interpreter prompt,
> repr( open('/etc/motd', 'rt').read() )
Opening and reading MOTD is a needless distraction from your actual
question. This demonstrates the issue most simply:
# at the interactive interpreter
py> s = "tex
STORE_SUBSCR
21 LOAD_CONST 0 (None)
24 RETURN_VALUE
If you do the swap in the other order, it works:
py> L = [10, 20, 30, 40, 50]
py> a = 3
py> L[a], a = a, L[a]
py> print a
40
py> print L
[10, 20, 30, 3, 50]
In all cases, the same rule applies:
- evaluate the right hand side from left-most to right-most, pushing the
values onto the stack;
- perform assignments on the left hand side, from left-most to right-most.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Wed, 17 Feb 2016 01:17 am, Marko Rauhamaa wrote:
> Ok, yes, but those "background tasks" monopolize the CPU once they are
> scheduled to run.
Can you show some code demonstrating this?
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
and I
> have no good reason to violate that constraint.
Since your test doesn't know what filesystem your code will be running on,
you can't make any assumptions about what paths are valid or not valid.
> Almost. I want the filesystem paths to be valid because the system under
> test expects them, it may perform its own validation,
If the system tries to validate paths, it is broken. That's how you get
broken applications that insist that all file names must be located in
C:\\My Documents. The application should allow the file system to validate
paths.
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
On Wednesday 17 February 2016 06:55, Chinmaya Choudhury wrote:
> Please guide me.
> #Chinmay
>
> Sent from Mail for Windows 10
How can we help you when we don't know what problem you have?
Is the computer turned on? Is the mouse plugged in? Are you double-clicking
the icon on the desktop? Wh
On Wednesday 17 February 2016 15:04, [email protected] wrote:
> Thanks for these detailed explanation. Both statements will close file
> automatically sooner or later and, when considering the exceptions, "with"
> is better. Hope my understanding is right.
>
> But, just curious, how do you know
Today I learned that **kwargs style keyword arguments can be any string:
py> def test(**kw):
... print(kw)
...
py> kwargs = {'abc-def': 42, '': 23, '---': 999, '123': 17}
py> test(**kwargs)
{'': 23, '123': 17, '---': 999, 'abc-def': 42}
Bug or feature?
--
Steve
--
https://mail.python
5701 - 5800 of 15564 matches
Mail list logo
