Please write in plain English if you want to be understood.
-Original Message-
From: Dave Angel
To: tutor@python.org
Sent: Thu, 10 Apr 2014 2:00
Subject: Re: [Tutor] masking library files
uga...@talktalk.net Wrote in message:
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Jared Nielsen Wrote in message:
> Hi Pythons,
> Could someone explain the difference between expressions and statements?
> I know that expressions are statements that produce a value.
> I'm unclear on functions and especially strings.
> Are any of the following expressions?
>
> print(42)
> print(
Jared Nielsen writes:
> Could someone explain the difference between expressions and
> statements?
For general programming terminology, the Wikipedia articles tend to be
good.
https://en.wikipedia.org/wiki/Expression_%28computer_science%29>
https://en.wikipedia.org/wiki/Statement_%28computer_sc
On 4/9/2014 3:59 PM, Adam Grierson wrote:
I'm using 3D climate data (ending in “.nc”). The cube contains time,
longitude and latitude. I would like to look at the average output over
the last 20 years. The time field spans back hundreds of years and I
only know how to collapse the entire field in
On 09/04/14 20:59, Adam Grierson wrote:
I'm using 3D climate data (ending in “.nc”). The cube contains time,
longitude and latitude. I would like to look at the average output over
the last 20 years. The time field spans back hundreds of years and I
only know how to collapse the entire field int
On 09/04/14 17:49, Jared Nielsen wrote:
Hi Pythons,
Could someone explain the difference between expressions and statements?
I know that expressions are statements that produce a value.
Yep, that's it.
I'm unclear on functions and especially strings.
Unclear in what way? Both functions and
Hi
I'm using 3D climate data (ending in “.nc”). The cube contains time, longitude
and latitude. I would like to look at the average output over the last 20
years. The time field spans back hundreds of years and I only know how to
collapse the entire field into a mean value. How can I tell py
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> Could someone explain the difference between expressions and statements?
>
> I know that expressions are statements that produce a value.
Yes, that's pretty much it. If you can point your finger at the thing
and say that it produces a value, it's an expression.
> Are any of the following expr
Hi Pythons,
Could someone explain the difference between expressions and statements?
I know that expressions are statements that produce a value.
I'm unclear on functions and especially strings.
Are any of the following expressions?
print(42)
print("spam")
spam = 42
print(spam)
Is the first examp
On 08Apr2014 22:58, Ni hung wrote:
> I am learning programming using python. I think of solving a problem using
> functions and for this reason all/most of my code consists of functions and
> no classes. I have some understanding of classes/Object Oriented
> Programming. I can write simple classe
On 09/04/14 15:17, uga...@talktalk.net wrote:
Is it common for files saved to a working directory to 'mask' library
files located in the Python framework?
Python looks in the local directory first so if you name a module with
the name of one of the standard modules Python will, quite reasonabl
On 09/04/2014 15:17, uga...@talktalk.net wrote:
Is it common for files saved to a working directory to 'mask' library
files located in the Python framework?
-A
Yes.
--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.
Mark Lawrence
---
On 09/04/2014 15:14, Peter Otten wrote:
Alexis Prime wrote:
However, pandas is a specialist topic and if you expect to work more with it
you may want to learn the proper idiomatic way to do it. You should then
ask again on a mailing list that is frequented by the pandas experts --
python-tutor i
Is it common for files saved to a working directory to 'mask' library files
located in the Python framework?
-A
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Alexis Prime wrote:
> Hello,
>
> My question is whether I should write a loop or a function to delete rows.
>
> I'm using pandas. But you may be able to help me as my question is about
> the reasoning behind programming.
>
> I have a pandas dataframe that looks like this, covering all countries
On 09/04/2014 10:23, Alexis Prime wrote:
Hello,
My question is whether I should write a loop or a function to delete rows.
I'm using pandas. But you may be able to help me as my question is about
the reasoning behind programming.
I have a pandas dataframe that looks like this, covering all cou
Hello,
My question is whether I should write a loop or a function to delete rows.
I'm using pandas. But you may be able to help me as my question is about
the reasoning behind programming.
I have a pandas dataframe that looks like this, covering all countries in
the world, for over 200 rows and
Ni hung Wrote in message:
(Please post in text format, not html. It doesn't matter for
your particular message, but several things can go wrong, where
some or most of us do not see what you meant to post)
> I am learning programming using python. I think of solving a
> problem using functi
On 09/04/14 06:58, Ni hung wrote:
functions and no classes. I have some understanding of classes/Object
Oriented Programming. I can write simple classes but I do not understand
when to use classes.
If you are just learning it may be that the programs you have written
are too small to make cl
On 2014-04-08 23:55, Peter Otten wrote:
You can create and sort the list in a single step:
l = sorted(myDict)
Thank you again; this is a new idiom for me.
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Steven D'Aprano wrote:
> On Tue, Apr 08, 2014 at 02:38:13PM -0600, Jared Nielsen wrote:
>> Hello,
>> Could someone explain why and how this list comprehension with strip()
>> works?
>>
>> f = open('file.txt')
>> t = [t for t in f.readlines() if t.strip()]
>> f.close()
>> print "".join(t)
>>
>> I
Hi
I am learning programming using python. I think of solving a problem using
functions and for this reason all/most of my code consists of functions and
no classes. I have some understanding of classes/Object Oriented
Programming. I can write simple classes but I do not understand when to use
cl
Thanks Danny!
That was an awesome explanation.
On Tue, Apr 8, 2014 at 7:05 PM, Danny Yoo wrote:
>
>> if line.strip()
>>
>> Is that stripping the line of white space at the same time that it is
>> testing it?
>>
>>
>
> Two features about Python:
>
> 1. Strings are immutable, so the above is com
Thank Danny,
That's much more clear.
But I still don't understand what's happening with:
if line.strip()
Is that stripping the line of white space at the same time that it is
testing it?
On Tue, Apr 8, 2014 at 3:44 PM, Danny Yoo wrote:
> > Could someone explain why and how this list comprehen
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