2008/12/17 Terry Reedy :
> Nodes only have single number indexes if you arrange them linearly. Then the
> index depends on how you arrange them, whether you start the array indexes
> with 0 or 1, and whether you start the level numbers with 0 or 1. Call the
> breadth-first sequence bf. Then the 1
Hi,
I'm searching for a clear explanation of binary tree properties,
expecially the ones related to logarithms.
For example, I know that in a tree with 2n-1 nodes, we have log(n)
levels, from 0 to log(n).
So, if k is the level, the nodes on a level have indexes between 2^k
and 2^(k+1)-1.
For k=0
2008/12/16 feba :
> Stuff like code.google, sf.net, are more oriented towards serious
> development, not just holding random apps, aren't they?
>
> Anyway, I found MediaFire, which looks like it will suffice for now.
Take a look to Dropbox (http://www.getdropbox.com/).
You can use it to directly
2008/11/21 harijay <[EMAIL PROTECTED]>:
> Hi
> I am a few months new into python. I have used regexps before in perl
> and java but am a little confused with this problem.
>
> I want to parse a number of strings and extract only those that
> contain a 4 digit number anywhere inside a string
>
> How
On Thu, Nov 20, 2008 at 13:34, Ben Finney
<[EMAIL PROTECTED]> wrote:
> Mr.SpOOn <[EMAIL PROTECTED]> writes:
>
>> Searching on google I found this: http://www.siafoo.net/article/61
>> He had the same issue and said to change permission of the file to 664.
>
> Unit test modules, which are primarily m
Hi,
I'm trying the nose testing package. I've just started reading the
tutorial and I had a problem with the first simple example.
This is the test:
def test_b():
assert 'b' == 'b'
In the same directory I gave the command nosetests and it runs the test.
Then I try with nosetests -v, but it
I think I've found a nice way to represent and build chords. At least,
at the moment it satisfy me, maybe later I'll understand how it sucks.
I'm using two separate classes: one represent a chord and is
implemented as a set of Notes; the other represents the structure
(type) of the chord and is a
On Wed, Nov 19, 2008 at 3:41 PM, Philip Semanchuk <[EMAIL PROTECTED]> wrote:
> I'm not sure why you'd need to host the Python code anywhere other than your
> home computer. If you wanted to pull thousands of pages from a site like
> that, you'd need to respect their robots.txt file. Don't forget to
On Wed, Nov 19, 2008 at 1:50 PM, Jeremiah Dodds
<[EMAIL PROTECTED]> wrote:
> If you need to do it on the extremely cheap, you can host on your own
> machine on a port other than 80, make sure your router / firewall is
> forwarding the port to your machine, and use dyndns (http://dyndns.com) to
> gi
On Wed, Nov 19, 2008 at 1:35 PM, Jeremiah Dodds
<[EMAIL PROTECTED]> wrote:
>
> Personally, I prefer a host that gives me root on a box (or virtual
> machine). I've had a great time with slicehost (http://slicehost.com).
Yes, I knew about slicehost, but it is expensive for what I need to
do, that i
On Wed, Nov 19, 2008 at 2:39 AM, Mensanator <[EMAIL PROTECTED]> wrote:
> Another hobby I have is tracking movie box-office receipts
> (where you can make interesting graphs comparing Titanic
> to Harry Potter or how well the various sequels do, if Pierce
> Brosnan saved the James Bond franchise, wh
On Tue, Nov 18, 2008 at 1:59 AM, Gabriel Genellina
<[EMAIL PROTECTED]> wrote:
> Yes, __cmp__ is gone in 3.0
> You said you wrote __cmp__ the same as __eq__ and that's wrong, they return
> different results. Try something like this (untested):
>
> class X:
> def __init__(self, a): self.a = a
> def
On Mon, Nov 17, 2008 at 8:30 PM, Terry Reedy <[EMAIL PROTECTED]> wrote:
> Sets and dicts use __hash__ and __eq__ together, as documented.
>
> "If a class does not define an __eq__() method it should not define a
> __hash__() operation either;" (3.0 manual, but same earlier).
Well, maybe, but in th
It seems that I solved my main problem, but I still have some doubt.
I'll make an example:
>>> class foo:
...def __init__(self, a):
...self.a = a
...
>>> f = foo(1)
>>> f2 = foo(2)
>>> f3 = foo(3)
>>> f1 = foo(1)
>>> s = set()
>>> s.add(f)
>>> s
set([<__main__.foo instance at 0x8311fa
On Sun, Nov 16, 2008 at 7:15 PM, Arnaud Delobelle
<[EMAIL PROTECTED]> wrote:
> Mr.SpOOn <[EMAIL PROTECTED]> writes:
>
>> Hi,
>> I'm trying to create a class which inherit a list to change some behavior.
>> This list should contain other instance objects and has to manage
>> these instances in a par
Hi,
I'm trying to create a class which inherit a list to change some behavior.
This list should contain other instance objects and has to manage
these instances in a particular way.
1) I need to sort this elements in this list, but they must be sorted
using an instance variable. What does Python u
On Sun, Nov 16, 2008 at 7:21 AM, Lawrence D'Oliveiro
<[EMAIL PROTECTED]> wrote:
> In message <[EMAIL PROTECTED]>, Mr.SpOOn
> wrote:
>
>> C 9 is a base chord plus a the ninth note, but this implies the
>> presence of the seventh too, so it results in: C E G B D
>
> I don't recall such meanings in th
Hi,
I've never used exception before, but I think now it's time to start.
I've seen that there is a list of the built-in exceptions in the
Python docs, but this explains the meaning of every exception. Does
exist an inverted list? I mean, how may I know what kind of exception
is going to raise my
Hi,
I'm writing a method to create musical chords.
This method must follow a specific set of syntax rules. At least, this
is my idea, but maybe there's a better way.
Anyway, in the code I have class Chord which is a set.
The costrunction of a chord is based on a root note and a structure,
so by d
Thanks, I just have to choose which one to use :)
--
http://mail.python.org/mailman/listinfo/python-list
Hi,
is there any way to search elements in a list using wildcards?
I have a list of various elements and I need to search for elements
starting with 'no', extract them and put in a new list.
I was thinking about something like:
mylist.index('no*')
Of course this doesn't work.
--
http://mail.pyth
On Sun, Nov 9, 2008 at 12:29 AM, Stef Mientki <[EMAIL PROTECTED]> wrote:
> Qt seems to be good, but I don't like their licence.
What's the problem with qt licence?
--
http://mail.python.org/mailman/listinfo/python-list
On Fri, Nov 7, 2008 at 7:02 PM, Marc 'BlackJack' Rintsch <[EMAIL PROTECTED]>
wrote:
>> What if I need the parse method to be called in other parts of the
>> program?
>
> I don't understand!? Then you call it from those other parts.
Yes, you're right. Don't know why, but I was thinking to use
@cl
On Fri, Nov 7, 2008 at 4:16 PM, Duncan Booth
<[EMAIL PROTECTED]> wrote:
> There is a really big advantage to being explicit in this situation: you no
> longer have to make sure that all your constructors use a unique set of
> types. Consider:
>
> class Location(object):
>def __init__(self, lat,
On Thu, Nov 6, 2008 at 11:00 PM, Ben Finney
<[EMAIL PROTECTED]> wrote:
> Yes, the main reason is that it kills duck typing. The initialiser
> should *use* the parameters passed, and allow exceptions to propagate
> back to the caller if the parameters don't behave as expected.
>
> Another good reaso
On Thu, Nov 6, 2008 at 11:00 PM, Ben Finney
<[EMAIL PROTECTED]> wrote:
> Yes, the main reason is that it kills duck typing. The initialiser
> should *use* the parameters passed, and allow exceptions to propagate
> back to the caller if the parameters don't behave as expected.
>
> Another good reaso
On Thu, Nov 6, 2008 at 7:44 PM, Tim Golden <[EMAIL PROTECTED]> wrote:
> While that's no bad thing, you don't really need to do
> that simply to understand these examples: they're just
> saying "do whatever you need to to make these method
> class methods, not instance methods".
Yes.
I think this
On Thu, Nov 6, 2008 at 4:59 PM, Marc 'BlackJack' Rintsch <[EMAIL PROTECTED]>
wrote:
> class A(object):
>def __init__(self, a, b, c):
>self.a = a
># ...
>
>@classmethod
>def from_string(cls, s):
># ...
>return cls(a, b, c)
Thanks.
I think it's time to st
Hi,
I know there can be only one __init__ method (at least, I think).
Often I need an object to be created in different ways, for example
passing a string as argument, or an integer, or another object. To
achieve this I put the default value of the arguments to None and then
I some if...elif insid
On Wed, Nov 5, 2008 at 10:03 PM, Arnaud Delobelle
<[EMAIL PROTECTED]> wrote:
> Only hashable objects can go in a set. By default a class you define is
> not hashable (unless it descends from a hashable class). To remedy this
> you can define a __hash__ method in your class. IIRC the only
> requi
The discussion's gone a bit off topic so I don't know if it is a good
idea to continue here. I'll try.
My first question was about a way to order a python set. Someone
suggested to try this module:
http://code.activestate.com/recipes/528878/
It seemed pretty good, but I've tried it just today an
On Wed, Nov 5, 2008 at 6:59 PM, Diez B. Roggisch <[EMAIL PROTECTED]> wrote:
> You need to call the __init__ of NoteSet inside Scale, as otherwise the
> instance isn't properly initialized.
Thanks, solved.
--
http://mail.python.org/mailman/listinfo/python-list
Hi,
I have a problem with this piece of code:
class NoteSet(OrderedSet):
def has_pitch(self):
pass
def has_note(self):
pass
class Scale(NoteSet):
def __init__(self, root, type):
self.append(root)
self.type = type
ScaleType(scale=self)
OrderedS
On Tue, Nov 4, 2008 at 5:20 AM, Joe Strout <[EMAIL PROTECTED]> wrote:
> We've got a need to generate short "samples" of songs that are in MIDI
> format, to provide a preview function in a web app. We'd like to do
> something more clever than just taking the middle 20 seconds (or whatever)
> of the
On Sat, Nov 1, 2008 at 1:57 AM, Lawrence D'Oliveiro
<[EMAIL PROTECTED]> wrote:
> In message <[EMAIL PROTECTED]>, Rob
> Williscroft wrote:
>
>> Read (and bookmark) this:
>>
>> http://www.python.org/doc/2.5.2/lib/re-syntax.html
>
> Funny how you never get a thank-you when you tell people to RTFM.
My
On Sun, Oct 26, 2008 at 9:54 PM, sonich <[EMAIL PROTECTED]> wrote:
> I need simple web crawler,
> I found Ruya, but it's seems not currently maintained.
> Does anybody know good web crawler on python or with python interface?
What about BeautifulSoup?
http://www.crummy.com/software/BeautifulSoup/
Hi,
I'd like to use regular expressions to parse a string and accept only
valid strings. What I mean is the possibility to check if the whole
string matches the regex.
So if I have:
>>> p = re.compile('a*b*')
I can match this: 'aabbb'
>>> m = p.match('aabbb')
>>> m.group()
'aabbb'
Hi,
in an application I have to use some variables with fixed valuse.
For example, I'm working with musical notes, so I have a global
dictionary like this:
natural_notes = {'C': 0, 'D': 2, 'E': 4 }
This actually works fine. I was just thinking if it wasn't better to
use class variables.
Sin
On Wed, Oct 22, 2008 at 4:30 PM, Roy Smith <[EMAIL PROTECTED]> wrote:
> In article <[EMAIL PROTECTED]>,
> Mr.SpOOn <[EMAIL PROTECTED]> wrote:
>
>> It seems to me that it orders elements when you add using the add()
>> method, but if you create a set starting from a list, it may result
>> unordered
On Wed, Oct 22, 2008 at 3:37 PM, Peter Otten <[EMAIL PROTECTED]> wrote:
> Tim Chase wrote:
>
>> Though for each test, in 2.3, 2.4, and 2.5 that I've got
>> installed on my local machine, they each printed "s" in-order,
>> and the iteration occurred in-order as well, even without the
>> added "sorte
Hi,
I need a structure to represent a set of integers. I also need to
perform on this set some basic set operations, such as adding or
removing elements, joining with other sets and checking for the
presence of specific elements.
I think that using Python sets would be the best choice, but I also
On Thu, Oct 16, 2008 at 10:54 PM, Lie Ryan <[EMAIL PROTECTED]> wrote:
> On Wed, 15 Oct 2008 14:34:14 +0200, Mr.SpOOn wrote:
> Something that is more pythonic is something that doesn't use
> multimethods. It's just an elaborated way to do type checking. In python,
> you usually avoid type checking a
Thanks for the suggestion. I think I'm gonna try the multimethods way,
that I didn't know about it.
--
http://mail.python.org/mailman/listinfo/python-list
Hi,
in a project I'm overloading a lot of comparison and arithmetic
operators to make them working with more complex classes that I
defined.
Sometimes I need a different behavior of the operator depending on the
argument. For example, if I compare a object with an int, I get a
result, but if I com
On Tue, Sep 30, 2008 at 12:55 PM, Ken Seehart <[EMAIL PROTECTED]> wrote:
> Instance comparison is not necessarily the same as string comparison.
> Neither __str__ nor __repr__ are implicitly used at all for comparison.
Ok, I see.
> In fact, by default a pair of instances are not equal unless the
Hi,
I have this piece of code:
class Note():
...
...
def has_the_same_name(self, note):
return self == note
def __str__(self):
return self.note_name + accidentals[self.accidentals]
__repr__ = __str__
if __name__ == '__main__':
n = Note('B')
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