list gatewayed to usenet though, there's
really nothing so good as usenet for proper discourse (!).
Hear, hear!
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The quality
. See
[Full list of changes between EmPy 3._x_ and
4.0](http://www.alcyone.com/software/empy/ANNOUNCE.html#all-changes)
for a more
comprehensive list.
--
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nges between EmPy 3._x_
and
4.0](http://www.alcyone.com/software/empy/ANNOUNCE.html#full-list-of-changes-between-empy-3-x-and-4-0)
for a more comprehensive list.
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3.9 appeared with my old errors. I uninstalled 3.10 as 3.9 did
not appear in control panel.
Dell Inspiron 3793 Win 10
Thanks
Dave Francis
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On Saturday, 24 November 2018 14:33:29 UTC+8, jasmin amrutia wrote:
> hello all,
> please hepl me in the above program. python to implement Railway Reservation
> System using file handling technique.
>
> System should perform below operations.
> a. Reserve a ticket for a passenger.
> b. List in
regards,
Francis Esmonde-White
###
*Bug 1:*
In the Python 3 tutorial section 9.8 for iterators
<https://docs.python.org/3/tutorial/classes.html#iterators>, the example
code for the iterator class Reverse has the iterator self.index defined
only in the __init__
Thankyou Francis Funari
Sent from Mail<http://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
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On 11/20/2014 04:15 PM, Chris Angelico wrote:
> On Fri, Nov 21, 2014 at 1:14 AM, Francis Moreau
> wrote:
>> Hi,
>>
>> Thanks for the "from __future__ import unicode_literals" trick, it makes
>> that switch much less intrusive.
>>
>> However it
Hi,
On 11/20/2014 11:47 AM, Chris Angelico wrote:
> On Thu, Nov 20, 2014 at 8:40 PM, Francis Moreau
> wrote:
>> My question is: how should this be fixed properly ?
>>
>> A simple solution would be to force all strings passed to the
>> logger to be unico
Hello,
My application is using gettext module to do the translation
stuff. Translated messages are unicode on both python 2 and
3 (with python2.7 I had to explicitely asked for unicode).
A problem arises when formatting those messages before logging
them. For example:
log.debug("%s: %s" % (hea
Hi Python fans, I just released my first open source project ever called
SharedHashFile [1]. It's a shared memory hash table written in C. Some guy on
Quora asked [2] whether there's an extension library for Python coming out. I
would like to do one but I know little about Python. I was wonderin
On 03/04/2014 05:05 PM, Peter Otten wrote:
> Francis Moreau wrote:
>
>> Hi,
>>
>> In my understanding (I'm relatively new to python), I need to decode any
>> bytes data provided, in my case, by a shell command (such as findmnt)
>> started by the subprocess
Hi,
In my understanding (I'm relatively new to python), I need to decode any
bytes data provided, in my case, by a shell command (such as findmnt)
started by the subprocess module. The goal of my application is to parse
the command outputs.
My application runs only on linux BTW and should run fin
EmPy should work with any version of Python from 2.4 onward,
including 3.x.
License
This code is released under the LGPL.
Release history [since 3.3]
- 3.3.2; 2014 Jan 24. Additional fix for source compatibility
between 2.x and 3.0.
- 3.3.1; 2014 Jan 22. Source c
hp files). But still, GNU M4 is
a decent piece of technology.
Agreed. The terror that most people feel when hearing "m4" is because
m4 was associated with sendmail, not because m4 was inherently awful.
It has problems, but you'd only encounter them when doing something
_very_ abs
I have a prototype data assimilation code ( an ionospheric nowcast/forecast
model driven by GPS data ) that is written in IDL (interactive data language)
which is a horrible language choice for scaling the application up to large
datasets as IDL is serial and slow (interpreted).
I am embarking
Just clarify there's no problem about calling twice to PyEval_InitThreads ()
as indicated by Python's doc.
> Hi,
>
>
>
> Maybe you already fixed the issue, but for the record, I've got the same
>
> problem and finally it turned out that I was calling PyEval_InitThreads twice
>
> and also afte
Hi,
Maybe you already fixed the issue, but for the record, I've got the same
problem and finally it turned out that I was calling PyEval_InitThreads twice
and also after fixing that, I also had to move the call to
PyEval_ReleaseLock(); at the end of the entire initialization (not just after
PyE
as syntactic significance.
Thank you!
PEP 8 says this is bad form. What do you think?
Where does it say that?
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On 07/20/2012 03:28 AM, BartC wrote:
"Erik Max Francis" wrote in message
news:gskdnwoqpkoovztnnz2dnuvz5s2dn...@giganews.com...
On 07/20/2012 01:11 AM, Steven D'Aprano wrote:
On Thu, 19 Jul 2012 13:50:36 -0500, Tim Chase wrote:
I'm reminded of Graham's Number, whi
On 07/20/2012 02:05 AM, Virgil Stokes wrote:
On 20-Jul-2012 10:27, Steven D'Aprano wrote:
The fellow looked relived and said "Oh thank god, I thought you said
*million*!"
How does this relate to the python list?
It's also a seriously old joke.
--
Erik Max Francis
n Graham's Number but still
inconceivably ginormous.)
You don't even need to go that high. Even a run-of-the-mill googol
(10^100) is far larger than the total number of elementary particles in
the observable Universe.
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Giampaolo Rodolà wrote:
Il 21 gennaio 2012 22:13, Erik Max Francis ha scritto:
The real reason people still use the `while 1` construct, I would imagine,
is just inertia or habit, rather than a conscious, defensive decision. If
it's the latter, it's a case of being _way_ too defensi
e idiomatic `while 1` notation comes from back in the pre-Boolean
days. In any reasonably modern implementation, `while True` is more
self-documenting. I would imagine the primary reason people still do
it, any after-the-fact rationalizations aside, is simply habit.
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e of being _way_ too defensive.
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Ambition can creep as well as soar.
-- Edmund Burke
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Hello everyone,
I'm currently trying to port some embedded code from python 2.7 to python 3.2.
The current code replicate the basic behavior of the python interpreter in
anMFC application. When a command is entered in our embedded interpreter, we
write it to a FILE* then transform this FILE* int
f.append(obj.__name__)
return obj
__all__ = AllList()
@__all__
def api(): pass
@__all__
def db(): pass
@__all__
def input(): pass
@__all__
def output(): pass
@__all__
def tcl(): pass
Bravo!
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San Jose,
Mel wrote:
Erik Max Francis wrote:
Mel wrote:
By convention, nobody ever talks about 1 x 9.97^6 .
Not sure what the relevance is, since nobody had mentioned any such thing.
If it was intended as a gag, I don't catch the reference.
I get giddy once in a while.. push things to limits
t 2 x 10^-8 kg, or on the order of 10^-8 kg (zero
significant figures). To convert to energy, multiply by c^2. c = 3 x
10^8 m/s, so c^2 = 9 x 10^16 m^2/s^2, or about 10^17 m^2/s^2, so the
Planck energy is on the order of 10^9 J. That's a calculation to zero
significant figures.
--
Mel wrote:
Erik Max Francis wrote:
Chris Angelico wrote:
On Tue, Jun 28, 2011 at 12:56 PM, Steven D'Aprano
wrote:
Zero sig figure: 0
That's not really zero significant figures; without further
qualification, it's one.
Is 0.0 one sig fig or two?
Two.
(Just vaguely curiou
igure would be an order of magnitude estimate only.
These aren't usually done in the "e" scientific notation, but it would
be something like 10^3 (if we assume ^ is exponentiation, not the Python
operator).
c^2 is 9 x 10^16 m^2/s^2 to one significant figure. It's 10^17 m^2/
ero sig figures value is ever useful.)
Yes. They're order of magnitude estimates. 1 x 10^6 has one
significant figure. 10^6 has zero.
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Steven D'Aprano wrote:
On Thu, 16 Jun 2011 22:20:50 -0700, Erik Max Francis wrote:
[...]
Yes, which could be rephrased as the fact that `break` and `continue`
are restricted to looping control structures, so reusing `break` in this
context would be a bad idea. You know, kind of like the
Ian Kelly wrote:
On Thu, Jun 16, 2011 at 10:24 PM, Erik Max Francis wrote:
True. So let's use `in` to represent breaking out of the top-level code of
a module. Why not, it's not the first time a keyword has been reused,
right?
The point is, if it's not obvious already from
Ian Kelly wrote:
On Thu, Jun 16, 2011 at 7:21 PM, Erik Max Francis wrote:
Neither makes sense. `break` exits out of looping structures, which the
top-level code of a module most certainly is not.
Why does that matter? It seems a bit like arguing that the `in`
keyword can't be use
t you're
just being difficult.
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Winners are men who have dedicated their whole lives to winning.
-- Woody Hayes
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`. If you want to
conditionally execute some code, use `if`. If you want to indicate an
exceptional condition, raise an exception.
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San Jose, CA, USA && 37 18 N 121 57 W && AIM/Y!M/Skype eri
Chris Angelico wrote:
On Fri, Jun 17, 2011 at 9:29 AM, Erik Max Francis wrote:
Chris Angelico wrote:
On Fri, Jun 17, 2011 at 8:07 AM, Erik Max Francis wrote:
It's quite consistent on which control structures you can break out of --
it's the looping ones.
Plus functions.
N
Chris Angelico wrote:
On Fri, Jun 17, 2011 at 8:07 AM, Erik Max Francis wrote:
It's quite consistent on which control structures you can break out of --
it's the looping ones.
Plus functions.
No:
>>> def f():
... break
...
File "", line 2
SyntaxError:
lookup where the keys are functions,
and execute the value. Even then, unless there are quite a lot of
cases, this may be overkill.
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Eric Snow wrote:
On Tue, Jun 14, 2011 at 5:51 PM, Erik Max Francis wrote:
Ethan Furman wrote:
To me, too -- too bad it doesn't work:
c:\temp>\python32\python early_abort.py
File "early_abort.py", line 7
return
^
SyntaxError: 'return' outside funct
eak".
To me, too -- too bad it doesn't work:
c:\temp>\python32\python early_abort.py
File "early_abort.py", line 7
return
^
SyntaxError: 'return' outside function
Nor should it. There's nothing to return out of.
--
Erik Max Francis && m.
onsist of mostly definitions. Modules can
interact with each other, be called recursively, etc., and so at an
arbitrary point saying, "break out of this module" doesn't have a great
deal of meaning.
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There is _never_ no hope left. Remember.
-- Louis Wu
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ite a different thing, not simply a Kronecker delta extended to the
reals. Kronecker deltas are used all the time over the reals; for
instance, in tensor calculus. Just because the return values are either
0 or 1 doesn't mean that their use is incompatible over reals (as
integers
he IEEE standard.
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There was never a good war or a bad peace.
-- Benjamin Franklin, 1706-1790
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nan}
{nan}
It's fundamentally because NaN is not equal to itself, by design.
Dictionaries and sets rely on equality to test for uniqueness of keys or
elements.
>>> nan = float("nan")
>>> nan == nan
False
In short, don't do that.
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quency. In all bases.
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They love too much that die for love.
-- (an English proverb)
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Hi,
How do I make a downloaded file layerfx.py executable in Gimp? using
the Python console.
the layerfx.py is in the download folder
thanks
Francis
On 3/8/11, python-list-requ...@python.org
wrote:
> Send Python-list mailing list submissions to
> python-list@python.org
>
>
ey'll work will help alone. If you're calling a trigonometric
function with a dimensionless argument, you either mean radians are
you've got bigger problems with the understanding of unit systems.
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Keith Thompson wrote:
Erik Max Francis writes:
[...]
>>> print c # floating point accuracy aside
299792458.0 m/s
Actually, the speed of light is exactly 299792458.0 m/s by
definition. (The meter and the second are defined in terms of the
same wavelength of light; this wa
ror: and
do not have compatible units
And everybody's favorite:
>>> print ((epsilon_0*mu_0)**-0.5).simplify()
299792458.011 m/s
>>> print c # floating point accuracy aside
299792458.0 m/s
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In Heaven all the interesting people are missing.
-- Friedrich Nietzsche
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t_ take any arguments, and
explicitly call its parent constructor not passing anything. So it
shouldn't be a wonder that it won't accept any arguments.
If you don't intend to override the constructor in the parent class,
simply don't define it.
--
Erik Max Francis &&am
Patrick Maupin wrote:
On Mar 2, 9:20 pm, Erik Max Francis wrote:
Patrick Maupin wrote:
On Mar 2, 5:36 pm, Steven D'Aprano wrote:
You seem to be taking the position that if you start with a config file
config.json, it is "too hard to edit", but then by renaming it to
config.rs
#x27;s the argument being used against you, not the argument being
ascribed to you. You're getting confused about something, somewhere.
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make your own "more readable"
format. If JSON is unreadable, so must be RSON.
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It's better to be quotab
point out
that in their opinion it's not such a good idea. You don't own this or
any other thread.
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It's better to be quotable than to be honest.
-- Tom Stoppard
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not one of them.
Agreed. Even YAML's acronym indicates that it is already a bridge too
far; we don't need more.
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> I can't believe the code editing situation today is in a such sorry
> state.
I can't believe an old coder is feeling so sorry for himself.
> Today, I tried to understand the twisted.web.client code and I found 3
> methods I couldn't find by who were called.
>
> I asked on the mailing list and t
pradeep wrote:
I have this file in linux
===
sample.py
#!/usr/bin/env python
name = "blah"
print name
...
Any one knows , whats the syntax error here?
You're indenting for no reason.
--
Erik Max Francis && m...@alcyone.com && h
[In re R. Hettinger's critiques]
> * it extends the language with arcane syntax tricks...
I think most of these in the current version of J. Bronson's "bidict"
can be left unused, or removed altogether. In almost all cases, a
bidict should be accessed as an ordinary python dict.
> * we've alrea
ssions. See python.org/doc for more information.
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You'll survive / A true Darwin star
-- Des'ree
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I was really inspired by this discussion thread! :-)
After much tinkering, I think I have a simpler solution. Just make
the inverse mapping accessible via an attribute, -AND- bind the
inverse of -THAT- mapping back to the original. The result is a
python dict with NO NEW METHODS except this inve
t the answer they're looking for. The former is
surely just laziness, but there's something psychological going on with
the latter.
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the same syntax, with `fi` written instead of `endif` -- not sure
why the difference in keyword is that big of a deal to you.
As others have pointed out, either way, there are quite a few languages
that use this type of syntax.
--
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was not a
suggestion to change Python.
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Mona Lisa / Come to discover / I am your daughter
-- Lamya
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Hmmm. I am trying some algorithms, and timeit reports that a
list.extend variant is fastest... WTH?! Really this seems like it
must be a "bug" in implementing the "[None]*x" idiom.
As expected, appending one-at-a-time is slowest (by an order of
magnitude):
% python -m timeit -s "N=100" \
ng. I'm wondering if there is a function in
python which can directly return this information.
The .count string method.
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on defined and need not be supported by any
compilers.
The proper way to do this is to define a protocol and translate it to
the native structures on both sides of the communication -- both in
Python and in C. There's really no way around this.
--
Erik Max Francis && m
these things will be the same.
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Diplomacy and defense are not substitutes for one another. Either
alone would fail. -
of and
would have no obligation to switch to, just as with 3.0.
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Nothing spoils a confession like repentence.
-- Anatole France
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x27;re the same object is pretty much never useful. The
other canonical use of `is` would be comparison to `None`, which is also
perfectly appropriate.
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San Jose, CA, USA && 37 18 N 121 57 W && A
what the value of `id` is or how the `is` operator works, the short
version is, don't worry about them, as you won't be using them.
I'm really rather surprised at the number of questions about them.
They're really something one does not need to worry about.
--
Erik Max Fr
Andre Engels wrote:
The reverse function is a function to reverse the list in place, not a
function to get the reverse of the list:
x = [1,2,3,4]
y = x
z = x.reverse()
will result in:
x = y = [4,3,2,1]
z = None
.reverse returns None. See the documentation.
--
Erik Max Francis &
xpressions. Variations of `else if` in `if ... else if ...` chains is
routine in computer languages. Choosing a deliberately different syntax
just for the sake it of is obtuse at best.
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San Jose, CA, USA &
On Oct 3, 11:58 pm, ryles wrote:
>
> Only objects with GC_TENTATIVELY_UNREACHABLE still set are
> candidates for collection. If it's decided not to collect such an object
> (e.g., it has a __del__ method), its gc_refs is restored to GC_REACHABLE
> again.
Ok so it happens _only_ w
Hello,
I'm looking at gcmodule.c and in move_unreachable() function, the code
assumes that if an object has its gc.gc_refs stuff to 0 then it *may*
be unreachable.
How can an object tagged as unreachable could suddenly become
reachable later ?
Thanks
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> I would like to propose that it be made impossible in the Python
> source to import two instances of the same module.
A fully-automatic solution is more difficult than it might seem at
first:
http://www.python.org/dev/peps/pep-0328/
But there is a simple code-discipline solution: never ever us
ant to talk about it you
have to disclaim that it's not a proper base and that's you're making up
as you go. But you can't pretend like it's the "obvious" mathematical
meaning just because the usual mathematical meaning doesn't apply, which
is what you see
lt with it. Had to change 'w:bz2' into 'w|bz2'.
But now have another problem:
It's the same problem, asked and answered. Why not read the replies of
the people telling you what the problem is?
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gure. 9 is not the same as 9.0 or 9.000.
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If the sky should fall, hold up your hands.
-- (a Spanish proverb)
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Hendrik van Rooyen wrote:
I also tried to include an example of a literal with a base of a Googol but I
ran out of both ink and symbols.
:-)
... or particles in the observable Universe, for that matter.
--
Erik Max Francis && m...@alcyone.com && http://www.alcyone.com/max/
S
hard to imagine).
Either way, conversion is, as Max showed, one line of code. It's hard
to see the explicit need for truly arbitrary-radix literals in any
language -- and I'm the guy who's put quaternary literals in syntaxes
he's had to develop just for fun. Binary
James Harris wrote:
On 24 Aug, 09:05, Erik Max Francis wrote:
Here's another suggested number literal format. First, keep the
familar 0x and 0b of C and others and to add 0t for octal. (T is the
third letter of octal as X is the third letter of hex.) The numbers
above would be
0b1011, 0
ne so upset by this that it didn't make it into the language, or
cause huge confusion on a regular basis that upsets a lot of users? Nope.
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with decimal 304?
You can't, and the operation makes no sense, which is what makes the
syntax unambiguous. An extended numeric literal continues the radix of
wherever it started.
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San Jose, CA, USA &a
large literals, I'd go with having spaces indicate automatic
concatenation (though only the first in the series can indicate the
radix, whichever method you choose above). It's the same as for
strings, and it's the common SI recommendation for thousands separators
anyway.
--
Erik Ma
trings), too, or that's going to bite you sometime later (but it's not
your main problem here).
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Every human being is a problem in search of a solution.
-- Ashley Montague
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Douglas Alan wrote:
Personally, my favorite is Lisp, which looks like
(set! y (+ y 1))
For varying values of "Lisp." `set!` is Scheme.
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Erik Max Francis && m...@alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 18 N 121 57 W &&
nt.
Given the history of programming languages, it doesn't really look like
the to-be-assigned variable being at the end of expression is going to
get much play, since not a single major one I'm familiar with does it
that way, and a lot of them have come up with the same convention
Grant Edwards wrote:
On 2009-08-14, Erik Max Francis wrote:
Grant Edwards wrote:
On 2009-08-14, Steven D'Aprano wrote:
What the hell
would it actually do???
IIRC in C++,
cout << "Hello world";
is equivalent to this in C:
printf("Hellow world")
ell, plus or minus newlines.
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Erik Max Francis && m...@alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 18 N 121 57 W && AIM/Y!M/Skype erikmaxfrancis
It's hard to say what I want my legacy to be when I'm long gone.
-- Aaliyah
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ercise for the double array, the hex form will look
like: [0807060504030201].
And the decimal value would be: [5.784376957523072e+17].
Where does the 5.447603722011605e-270 value comes from ?
Thanks for your help,
Francis
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eparate entity.
Especially if you're dealing with a special-purpose language where
everything is really a form of an generalized array representation of
something _anyway_.
--
Erik Max Francis && m...@alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA &&
Chris Rebert wrote:
On Sat, Jul 25, 2009 at 4:21 PM, Erik Max Francis wrote:
Steven D'Aprano wrote:
But it's not "practically every function". It's hardly any function at all
-- in my code, I don't think I've ever wanted this behavior. I would
consider it an
there are numerous applications where scalars and
1x1 matrices are mathematically equivalent.
--
Erik Max Francis && m...@alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 18 N 121 57 W && AIM/Y!M/Skype erikmaxfrancis
Gods are born and die, but
sy ways to
verify you have a valid tensor equation using it.
--
Erik Max Francis && m...@alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 18 N 121 57 W && AIM/Y!M/Skype erikmaxfrancis
If the sky should fall, hold up your hands.
-- (a Spanish
ngely turned inside out. You're obviously looking for
which one _isn't_ `None`, so write the tests that way. It's much easier
for everyone else (including your potential future self) to follow.
--
Erik Max Francis && m...@alcyone.com && http://www.alcyone.com/m
On Jun 11, 6:23 pm, Mensanator wrote:
> Removing the duplicates could be a big problem.
It is fairly easy to ignore duplicates in a sorted list:
from itertools import groupby
def unique(ordered):
"""Yield the unique elements from a sorted iterable.
"""
for key,_ in groupby(ordered):
c.
Even if you restrict yourself to base-b expansions (for which the
statement is true for integer bases), you can cheat there too: e is 1
in base e.
--
Erik Max Francis && m...@alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 18 N 121 57 W &&a
erics Manual, 2nd Edition, published in 1988? It's
such a classic piece that I think it should be posted somewhere...
I only see used versions of it available for purchase. Care to hum a
few bars?
--
Erik Max Francis && m...@alcyone.com && http://www.alcyone.com/max/
San Jose,
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