"Alan Stern" wrote
Hi all. My name is Al Stern.
Hi Al,
Chapter 5: Lists and Dictionaries.
Note Lists AND Dictionaries
I'm not sure exactly how this mailing list works but
was hoping someone here could give me some insight
You are doing just fine.
The only extra info we could fin
Hello all,
I have been using this class extensively in my modules / scripts. It
provides the ability to .reference dictionary values. I find it handy,
but am afraid it may come back to haunt me at some point. Is there
anything wrong with using this?
class Structure(dict):
""" A 'fancy' dicti
On Mon, Dec 6, 2010 at 7:34 AM, John wrote:
> Hello all,
>
> I have been using this class extensively in my modules / scripts. It
> provides the ability to .reference dictionary values. I find it handy,
> but am afraid it may come back to haunt me at some point. Is there
> anything wrong with usi
"Joel Goldstick" wrote
def __getattr__(self, attr):
# Fake a __getstate__ method that resturns None
if attr == "__getstate__":
return lambda: None
why not "return None"?
Presumably the caller is expecting a function that he can call.
The lambda is such a functio
Dear all
What advantages does Python have over MATLAB as a programming language, (not
the computing environment of MATLAB)?
Also, wikipedia says Python is an interpreted language, what does that mean?
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"Joel Goldstick" wrote
def __getattr__(self, attr):
# Fake a __getstate__ method that resturns None
if attr == "__getstate__":
return lambda: None
why not "return None"?
return self[attr]
Oops, too quick. I neant to add:
But this line seems to retur
>I am starting with a book called Python Programming for the Absolute Beginner
>by Michael Dawson. The book has been >pretty good >and up to this point, I
>have grasped all the concepts it has covered. At the end of each chapter,
>there are a number of challenges you >need to complete before m
1) Python is free!
2) Python indices start at 0!
3) Python has way better GUIs
4) Python can emulate a lot of Matlab functionality with matplotlib and numpy
5) Matlab has a rather limited number of data structures
6) Matlab doesn't have anything like the third party support for almost
anything
7)
On Mon, Dec 6, 2010 at 2:47 PM, Alan Gauld wrote:
> Oops, too quick. I neant to add:
>
> But this line seems to return a value so the return values of this function
> seem to be incompatible which is not a good design pattern.
I agree it's not the clearest way to do this, but not because of
incom
Thanks for the advice. I think I have the dictionary function set up right
now although I'm still not clear why it is better than the list.
attributes = {"strength": 0, "health": 0, "wisdom": 0, "dexterity": 0}
I think my next task is to set up a while function based on when
available_points dro
Hugo,
Thank you for the response, it's very helpful. I posted a question
earlier to this list (or possibly numpy) about how to create a 'matlab
like structure'. This was early in my learning of Python, and yes, the
intention was to have something that was similar to a matlab
structure... now, I've
On Mon, Dec 6, 2010 at 4:32 PM, John wrote:
> Hugo,
>
> Thank you for the response, it's very helpful. I posted a question
> earlier to this list (or possibly numpy) about how to create a 'matlab
> like structure'. This was early in my learning of Python, and yes, the
> intention was to have somet
Chris,
Can you say more about number (7) in your list? What does "pass by value"
mean and what are the alternatives?
Thanks,
Joel
> -Original Message-
> From: tutor-bounces+joel=joelschwartz@python.org
> [mailto:tutor-bounces+joel=joelschwartz@python.org] On
> Behalf Of Chris
On Mon, Dec 6, 2010 at 11:09 AM, Joel Schwartz wrote:
> Chris,
>
> Can you say more about number (7) in your list? What does "pass by value"
> mean and what are the alternatives?
>
Pass by value is exactly what it sounds like - you pass the value (a copy of
everything in the memory). This is bad
On Mon, Dec 6, 2010 at 6:09 PM, Joel Schwartz wrote:
> Chris,
>
> Can you say more about number (7) in your list? What does "pass by value"
> mean and what are the alternatives?
>
> Thanks,
> Joel
>
Generally, pass-by-* refers to how the arguments to functions are treated.
* In call-by-value, the
"Al Stern" wrote
Thanks for the advice. I think I have the dictionary function set
up right
now although I'm still not clear why it is better than the list.
attributes = {"strength": 0, "health": 0, "wisdom": 0, "dexterity":
0}
Consider where you want to update the points for "health"
U
"Jaidev Deshpande" wrote
What advantages does Python have over MATLAB as a programming
language,
Python is a general purpose programming language.
Matlab is a mathematical modelling toool that happens to be
programmable.
You wouldn't sensibly use Matlab to create a web site, or an action
It also makes it hard to modify some data structure you are working with. I
was experimenting with some object-oriented programming in Matlab, and you
actually have to explicitly inherit from "handle" if you have any methods that
modify internal state. That was a surprise!
If you've got a da
I'm trying to save files into a specific directory, the file will be
generated from a python script. The script will look for some data stored in
a directory which only allows to read files, it doesn't let the user write
or modify information. But when I run the script I got the next error:
Python
Chris Fuller wrote:
On Monday 06 December 2010, Jaidev Deshpande wrote:
Also, wikipedia says Python is an interpreted language, what does that
mean?
The "interpreted" bit refers to the fact that the source code is not compiled
before it is run. This is also true of Matlab.
That's not comp
Susana Iraiis Delgado Rodriguez wrote:
[UPPER CASE text is interpreted as shouting in emails and usenet posts.
Please don't shout. Because spammers do it all the time it's more likely to
make potential readers turn away from your writ rather than pay extra
attention.]
> I'm trying to save file
Joel Schwartz wrote:
Chris,
Can you say more about number (7) in your list? What does "pass by value"
mean and what are the alternatives?
Oh boy, is that a can of worms... and this is going to be a long post.
You might want to go make yourself a coffee first :)
Pass by whatever (also writte
Ok. I think I am starting to get it but still not sure how to separate the
value from the key. Once I have this...
attributes = {"strength": 0, "health": 0, "wisdom": 0, "dexterity": 0}
MAX_POINTS = 30
How do I set the variable for available_points?
available_points = MAX_POINTS - (not sure wh
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