On Tue, Oct 22, 2013 at 04:25:59PM +0200, Sven Hennig wrote:
> Hello, I would like to learn a programming language and have decided to use
> Python. I have some programming experience and doing well in Python. What
> really causes me problems is OOP.
> I'm just dont get it... I'm missing a really
On Tue, Oct 22, 2013 at 9:50 PM, Steven D'Aprano wrote:
> However, there does have to be the same number of items on both sides:
>
> py> a, b, c = "xy"
> Traceback (most recent call last):
> File "", line 1, in
> ValueError: need more than 2 values to unpack
3.x extends sequence unpacking to s
On Tue, Oct 22, 2013 at 9:04 PM, SM wrote:
> def run(self):
> (process, err) = Popen(self.fwcmd, stdout=PIPE,
> stderr=PIPE).communicate()
> if len(err) > 0:
> # print("Error")
> # Error handling code
> else:
> # print("S
On Tue, Oct 22, 2013 at 07:20:25PM +, Key, Gregory E (E S SF RNA FSF 1 C)
wrote:
> I understand that a comma in Python is a separator and not an
> operator. In some of the MatPlotLib examples I see code like this:
>
> line1, = ax1.plot(t, y1, lw=2, color='red', label='1 HZ')
>
> What does
On Tue, Oct 22, 2013 at 3:20 PM, Key, Gregory E (E S SF RNA FSF 1 C)
wrote:
> I understand that a comma in Python is a separator and not an operator. In
The comma operator creates a tuple. It has low precedence, so you
usually need parentheses. But sometimes the parentheses are redundant
such as
Hello!
I am trying to terminate a Popen session using Popen.terminate() ( using
the info at http://docs.python.org/library/subprocess.html and some
relevant answers from Stack Overflow). But it doesn't seem to work for me.
I am calling Popen to run a command (which runs for a long time) from one
t
On 22/10/13 22:21, Ulrich Goebel wrote:
for my first python program I try to build a user interface for a litle
address database. Therefor I use pyqt to build the formular, and later I
will connect it to an existing SQLite DB, using APSW.
This list is for beginners to the python language and s
On 22/10/13 19:18, Sven Hennig wrote:
Thank you! You guys helped me out alot.
@Alan your website is great! Really clearly written. Especially the
"Things to remember" part.
Glad you like it. Someday (soon!) I'll get round to finishing
the v3 version... So much to do, so little time!
If you h
On 22/10/13 20:20, Key, Gregory E (E S SF RNA FSF 1 C) wrote:
I understand that a comma in Python is a separator and not an operator.
In some of the MatPlotLib examples I see code like this:
line1, = ax1.plot(t, y1, lw=2, color='red', label='1 HZ')
What does the comma do in an assignment statemen
Hello,
for my first python program I try to build a user interface for a litle
address database. Therefor I use pyqt to build the formular, and later I
will connect it to an existing SQLite DB, using APSW.
Besides the "normal" things as name, address, email and others I want to
store an imag
Thank you! You guys helped me out alot.
@Alan your website is great! Really clearly written. Especially the "Things
to remember" part.
If you have exercises for me or have a Website with exercises, bring it on. I
think this is the best way to learn.
2013/10/22 Dave Angel
> On 22/10/2013 10:2
I understand that a comma in Python is a separator and not an operator. In some
of the MatPlotLib examples I see code like this:
line1, = ax1.plot(t, y1, lw=2, color='red', label='1 HZ')
What does the comma do in an assignment statement?
Greg Key
This message and any attachments are solely fo
On 22/10/2013 10:25, Sven Hennig wrote:
> Hello, I would like to learn a programming language and have decided to use
> Python. I have some programming experience and doing well in Python. What
> really causes me problems is OOP.
> I'm just dont get it... I'm missing a really Practical example. I
On Tue, Oct 22, 2013 at 10:25 AM, Sven Hennig wrote:
> Hello, I would like to learn a programming language and have decided to
> use Python. I have some programming experience and doing well in Python.
> What really causes me problems is OOP.
> I'm just dont get it... I'm missing a really Practica
On 22/10/13 15:25, Sven Hennig wrote:
Hello, I would like to learn a programming language and have decided to
use Python. I have some programming experience and doing well in Python.
What really causes me problems is OOP.
Don't worry this is common.
The problem with OOP is that it only really b
On 22/10/13 14:55, Ricardo Aráoz wrote:
Sorry, meant try/except (I was thinking VFP).
Wouldn't if/else be more difficult when validating if an input is a
valid float? I find try/except easier.
Maybe, but typical programming classes don't teach try/except
till much later in the course.
Since t
Hello, I would like to learn a programming language and have decided to use
Python. I have some programming experience and doing well in Python. What
really causes me problems is OOP.
I'm just dont get it... I'm missing a really Practical example. In every
book I've read are the examples of such C
On 22/10/2013 03:23, Jenny Allar wrote:
Plenty of sound advice as always so I'll just point out that...
elif product_weight >= 10 and product_weight < 25:
can be written as
elif 10 <= product_weight < 25:
--
Python is the second best programming language in the world.
But the best has
El 22/10/13 10:44, Alan Gauld escribió:
On 22/10/13 14:21, Ricardo Aráoz wrote:
- Did you notice your assignment specifically asks for a "while" loop
for validation? ... (tip: you should be using "while" and "on
error")
on error?
You're not thinking of VB by any chance? :-)
In Python it would
On 22/10/13 14:21, Ricardo Aráoz wrote:
- Did you notice your assignment specifically asks for a "while" loop
for validation? ... (tip: you should be using "while" and "on
error")
on error?
You're not thinking of VB by any chance? :-)
In Python it would be a try/except block or maybe a straigh
On 22/10/13 13:42, Sydney Shall wrote:
trying to get him to adopt a workflow where he writes on paper
an informal "use case" description of the solution and if
necessary a pseudo code design.
Could you please explain exactly what you mean by 'an informal "use
case" description of the solution
- Did you notice your assignment specifically asks for a "while" loop
for validation? That means you are expected to validate input. Run your
program and when the program asks "Please enter the weight of the
product in pounds: " answer "123...this is a mistake", what does it
happen? Your progra
On 22/10/13 03:23, Jenny Allar wrote:
I ended up using the following code:
One wee improvement you could consider:
def cal_shiprate(product_name, product_weight):
if product_weight < 10:
ship_rate = 1.5
elif product_weight >= 10 and product_weight < 25:
ship_rate = 1
I am glad we are having this discussion. It helps me understand the
plight of some of our posters.
I had the benefit of a good school system, plus attending a technical
high school and a college of engineering.
In the early 90's I was an adjunct professor at the University of
Denver's "Unive
On 22/10/2013 00:42, Alan Gauld wrote:
On 22/10/13 00:07, Steven D'Aprano wrote:
I'd like to upgrade that process :D ...
1) think about your problem
2) if there are some heplful libraries that can make it way easier,
use them
3) write some code
4) fix the bugs until it'll run
5) write unitte
Thank you all for your help with this program. Each of your answers helped
me piece together an understanding of the assignment. After several days
and clearly over-thinking the entire process, I ended up using the
following code:
def main ():
name = input("Please enter the name of the product
The interesting thing however is that the schools have not taught
>>any kind of approach to problem solving, they just give a homework assignment
>>and expect them to produce code.
>
>
>I feel like we've had this conversation a long, long time ago. :P
>
>
>This is the sort of thing that we should
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