i'm guessing assignment, which actually associates
a reference, will skip referencing an identifier to a null
and will make the association (assignment) to the first
non-null value in the expression, which is string2 in
this case. that the identifier is non_null is immaterial;
you could write
i'm working (gratefully) with a small python study group
and preparing an intro to python class.
if you like, i'll send you my lessons and hope for your
questions and feedback.mine is certainly not the best
python material (i think it's not bad), but it comes with the
ability for you t
i'd like to know, too. my take so far is
* don't make any copies if you can avoid doing so,
* make shallow copies if need be,
* make deep copies only if you can't think of any
other way to accomplish what you're up to.
what's the truth? I'm hoping there's an OTW answer
(OTW ~> "One True Way").
i'm guessing this is the "post-it effect".
aa = range(0,10)
print aa
[0,1,2,3,4,5,6,7,8,9]
# what you've done is to use the range function to
# create the list of 0 to 9, then you associated the
# name aa to the list. a popular teaching analogy
# is that of putting a post-it that says aa on the l
you might consider keeping your code at two
spaces and when/if the need arises to share
your code, write a little filter program that
translates the two-space indents to four.
very interesting idea to play piano notes.
how'd you do that?
On Nov 30, 2007, at 10:58 AM, [EMAIL PROTECTED] wr
it might work just to strip 'home' and leave
print s1
//test/
the '/' character is a separator, so
/this//that/andmore/
is, at least at the shell level, the same as
/this/that/andmore/
i.e. any number of '/' characters adjacent has
the effect of a single '/' character (again, at the
shell level)
I'd love to know scott's definition of "framework", especially
contrasting with full-blown CMS.
Frameworks for Python:
CherryPy · Django · Karrigell · Nevow · Porcupine · Pylons · Spyce ·
TurboGears · TwistedWeb · Webware · Zope
per http://en.wikipedia.org/wiki/Django_(web_framework)
On Nov 27, 2007, at 9:40 AM, Scott SA wrote:
> On 11/27/07, jim stockford ([EMAIL PROTECTED]) wrote:
>
>> IMO:
>> my experience with cms systems is that there's a big
>> learning curve. you might have more fun (and be more
>> productive and maybe more cr
IMO:
my experience with cms systems is that there's a big
learning curve. you might have more fun (and be more
productive and maybe more creative) if you use the
available appropriate python modules and cobble
together your own site.
maintenance, especially by some one else, would
be an area t
On Nov 13, 2007, at 3:11 PM, Alan Gauld wrote:
> Rather than answer your question directly can I ask, do
> you know *why* wiser heads say global is bad? What
> problems does using global introduce? What problems
> does it solve?
i'll try:
globals are good because they provide common data to
On Oct 12, 2007, at 11:48 AM, Kent Johnson wrote:
> If all you want to do is copy the list, then
>lstB = lstA[:]
> is fine, or you can use
>lstB = list(lstA)
why choose one over the other? is there a performance
or other difference?
___
Tutor
I've gotten red-eyed looking through google pages
to find answers. I've read the python.org docs and
tutorials entirely (some parts very quickly).
If I write a little .py file, its name is __main__
assuming no big nit-picks in the claim above,
is __main__ a class?
What exactly does it mean "mod
Thanks for your explenation, so essentialy a = b, copys the pointer of
> a
> to b rather than the actual content. This explains why a[:] does work.
>
> Do you have an explenation why this is not the case with integers ie.
>
>>>> a, b = 10, a
>>>> b = b
seems to me this is an artifact of the language.
reading right to left:
"make a list that contains 10,40,30,20, then create a
name 'a' to be used as a label to identify that list, then
(next line) create a label 'b' to attach to whatever is
the thing 'a' refers to, then (next line) modify
Why is a dict lookup constant time. I.e. if there's a
loop that walks a (shorter) list and compares each
element with each element of a dict, what's going
on to make this faster than an outer loop walking
a list and an inner loop walking a second list?
On Aug 16, 2007, at 5:01 PM, Stephen McIne
here's a link to the very brief vi get-started web page:
http://www.sf-lug.com/How2vi.html
On Jul 17, 2007, at 11:01 AM, Sara Johnson wrote:
> Sure, sounds good. Should I assume that 'any' Unix version allows Vim?
>
> Thanks,
> Sara
>
> ----- Original M
you want a very brief set of vi(m) commands--
a get-you-started tutorial that's nearly painless?
I'll send if "yes".
jim
On Jul 16, 2007, at 9:26 PM, Sara Johnson wrote:
> First off, yes, I was referring to (I guess you could say) a
> non-python editor. I use an SSH editor set up by my school.
change "small" to "large" and you're right.
Vim is Vi improved.
Any tutorial or reference on Vi ought to work
for Vim.
On Jul 17, 2007, at 10:09 AM, Sara Johnson wrote:
> I initially thought Vim was sort of the same as Vi, just a few small
> differences or upgrades. Or have I got that confused
$ who am i
unohoo
$ which python
/usr/bin/python
$ python
Python 2.3.4 (#1, Mar 20 2006, 00:23:47)
[GCC 3.4.5 20051201 (Red Hat 3.4.5-2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> print 1
1
>>> help()
help> quit
>>>
$
$ vi doit.py
$ ls
doit.py
$
as I understand things...
there's a writeup somewhere that uses the term "bind" instead
of "assign" for the operation
a = b
for example, in Python
a = 1
the value 1 now has a name of a associated with it.
b = a
the value 1 now has two names, a and b, associated with it
the value 1 exists as an o
On Jul 8, 2007, at 9:45 AM, Alan Gauld wrote:
> (The tests at the end
> are poorly written too. If one of my team produced code like
> this I'd be having strong words with them!)
If you'd be willing to share your strong words, I'd
be grateful to learn better alternatives.
__
sounds like threading is a solution.
On Jun 3, 2007, at 2:05 PM, Jason Coggins wrote:
> I am using Linux and yes I am wanting the program to run another
> program. I
> have tried these before but, if I remember correctly, these methods
> caused
> the original program to "freeze" while waiting
i'd be curious to see what happens if you
use the tag around your (properly)
indented code, e.g.
this = 1
that = 0
if this == 1 :
that = 1
print that
On May 29, 2007, at 9:24 AM, Adam Urbas wrote:
> Hey,
>
> I have gmail now, but I'm not sure how to turn off HTML.
> ___
the problem is in the return.
if you append a print statement to the class function
such as
print "number is ",number # (properly indented, of course)
you'll get 8
On May 12, 2007, at 5:11 PM, John Fouhy wrote:
> On 13/05/07, Marilyn Davis <[EMAIL PROTECTED]> wrote:
>> #!/usr/bin/env python
there's also the question of the delivery architecture:
if there are multiple machines in a clustered
configuration, even something such as DNS round
robin, then improving performance is a matter of
throwing machines at the front end.
On May 9, 2007, at 1:17 PM, Alan Gauld wrote:
>
> "OkaMth
no need for apology on my side. there's
no agreed-upon and expressed policy.
i like the model that we accept each
other as we are.
On Jan 20, 2007, at 7:10 AM, Karl Wittgenstein wrote:
> Sorry for the swear words...
>
> 2007/1/20, Kent Johnson <[EMAIL PROTECTED]>: Karl Wittgenstein w
so it's guaranteed that
'Writing Message to'
will always be followed by
'TRANSPORT_STREAM_ID'
before the next occurrence of
'Writing Message to'
and all text between can be ignored,
and we increment the counter if and only if
there is a newline immediately after
'TRANSPORT_STREAM_I
from
http://docs.python.org/lib/built-in-funcs.html
some functions are always available--the built-in functions.
(from elsewhere) everything in python is an object.
hey, from abs() to zip() there's type() and super() and str()
and setattr() and ... dir() and... they're the
t; Now I want to select ''GeneName ' into listA
> and 'ATTAAGGCCAA' into listB
>
> so I want to select 0,3,6,9 elements into listA
> and 2,5,8,11 and so on elements into listB
>
> then I can do dict(zip(listA,listB))
>
> however, the ve
keep a counter in your loop. is this a homework question?
On Sep 23, 2006, at 8:34 AM, kumar s wrote:
> hi,
>
> the reason could be that I did not quite understand
> the concept of looping
>
> I have a list of 48 elements
>
> I want to create another two lists , listA and listB
>
> I want to loo
i hope this helps: what a fun idea! do it!
my way is to do a bad job fast then re-visit the
plans and reimplement and test and re-visit and
reimplement and test and
consider writing a main program that does the
primary work and outputs as text-only.
maybe then create four clas
i think it's a mistake to concentrate on one book.
Cull responses and pick three books to start with.
The benefit is that where one book presents a
poor explanation, another will do a good job (and
one book will omit certain things that another
presents).
Also, you'll probably find you
y way of
explaining my avoidance above. Might help
to know I very much liked working in assembler
and infer possible assembler correspondences
when I wonder about code behavior.
Your rundown of search order is helpful.
more thanks.
jim
On Aug 14, 2006, at 7:52 PM, Luke Paireepinart wrote:
For example,
import os
import sys
My take is that one uses the import keyword in a
program.
The Python interpreter reads the program and
generates machine code.
The import keyword directs the Python interpreter
to find some library (which is not necessarily named,
certainly not necess
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