On Tue, Nov 3, 2015 at 6:22 PM, Steven D'Aprano wrote:
> A lot can happen in the few microseconds between
> checking for the existence of the file and actually opening it -- the file
> could be renamed or deleted.
And a lot of microseconds can happen between two opcodes, too. Even
inside a Python
On Tue, 3 Nov 2015 06:16 pm, Chris Angelico wrote:
> Not to mention having race condition possibilities.
Arrggghhh! I knew there was something else I wanted to say.
You're right. Sometimes you *have* to use exception handling code. Take this
for example:
if os.path.exists(pathname):
f = op
On Tue, 3 Nov 2015 03:23 pm, ru...@yahoo.com wrote:
> Regular expressions should be learned by every programmer or by anyone
> who wants to use computers as a tool. They are a fundamental part of
> computer science and are used in all sorts of matching and searching
> from compilers down to your
On Tue, Nov 3, 2015 at 5:47 PM, Steven D'Aprano wrote:
> On Fri, 30 Oct 2015 04:43 am, vasudevram wrote:
>
>> Are there any modern (i.e. for current versions of Python 2 and 3)
>> recommended exception handling practices?
>
> When you say "modern", it sounds like you want to contrast them with "ol
On Mon, 02 Nov 2015 18:52:55 +1100, Steven D'Aprano wrote:
> In Python 2, stderr is unbuffered.
>
> In most other environments (the shell, C...) stderr is unbuffered.
>
> It is usually considered a bad, bad thing for stderr to be buffered. What
> happens if your application is killed before the
Hi Vasudev, and welcome.
Sorry for the delay in replying to your questions. My answers inline, below.
On Fri, 30 Oct 2015 04:43 am, vasudevram wrote:
> Are there any modern (i.e. for current versions of Python 2 and 3)
> recommended exception handling practices?
When you say "modern", it sound
On 11/02/2015 08:52 AM, Robinson, Wendy wrote:
> [cid:image001.png@01D11543.5ED11D50]
Just FYI this mailing list group is tied with with a system called
USENET which is plain text only, so most of us can't see your
attachment. This may help you copy the text to your messages in plain
text form:
On 11/02/2015 09:23 PM, rurpy--- via Python-list wrote:
>> My completely unsolicited advice is that regular expressions shouldn't be
>> very high on the list of things to learn. They are very useful, and very
>> tricky and prone many problems that can and should be learned to be
>> resolved with m
On 11/02/2015 09:23 PM, rurpy--- via Python-list wrote:
> On 11/02/2015 08:51 PM, Michael Torrie wrote:
>> [...]
>> Indeed, sometimes Jamie Zawinski's is often quite appropriate:
>>
>> Some people, when confronted with a problem, think "I know, I'll use
>> regular expressions." Now they have tw
On Monday, November 2, 2015 at 8:58:45 PM UTC-7, Joel Goldstick wrote:
> On Mon, Nov 2, 2015 at 10:17 PM, Seymore4Head
> wrote:
>
> > On Mon, 2 Nov 2015 20:42:37 -0600, Tim Chase
> > wrote:
> >
> > >On 2015-11-02 20:09, Seymore4Head wrote:
> > >> How do I make a regular expression that returns t
On 11/02/2015 08:51 PM, Michael Torrie wrote:
>[...]
> Indeed, sometimes Jamie Zawinski's is often quite appropriate:
>
> Some people, when confronted with a problem, think "I know, I'll use
> regular expressions." Now they have two problems.
Or its sometimes heard paraphrase:
Some people,
On Mon, Nov 2, 2015 at 10:17 PM, Seymore4Head
wrote:
> On Mon, 2 Nov 2015 20:42:37 -0600, Tim Chase
> wrote:
>
> >On 2015-11-02 20:09, Seymore4Head wrote:
> >> How do I make a regular expression that returns true if the end of
> >> the line is an asterisk
> >
> >Why use a regular expression?
> >
On 11/02/2015 07:42 PM, Tim Chase wrote:
> On 2015-11-02 20:09, Seymore4Head wrote:
>> How do I make a regular expression that returns true if the end of
>> the line is an asterisk
>
> Why use a regular expression?
>
> if line[-1] == '*':
> yep(line)
> else:
> nope(line)
Indeed, some
On 10/25/2015 06:17 PM, Montana Burr wrote:
> I'm looking for a library that will allow Python to listen for the shriek
> of a smoke alarm. Once it detects this shriek, it is to notify someone.
> Ideally, specificity can be adjusted for the user's environment. For
> example, I expect to need modera
On Tue, 3 Nov 2015 01:19:34 +, MRAB
wrote:
>On 2015-11-03 01:09, Seymore4Head wrote:
>> How do I make a regular expression that returns true if the end of the
>> line is an asterisk
>>
>To match an asterisk: \*
>
>To match the end of a line: $
>
>To match an asterisk at the end of a line: \*$
On Mon, 2 Nov 2015 20:42:37 -0600, Tim Chase
wrote:
>On 2015-11-02 20:09, Seymore4Head wrote:
>> How do I make a regular expression that returns true if the end of
>> the line is an asterisk
>
>Why use a regular expression?
>
> if line[-1] == '*':
>yep(line)
> else:
>nope(line)
>
>-tkc
On 2015-11-02 20:09, Seymore4Head wrote:
> How do I make a regular expression that returns true if the end of
> the line is an asterisk
Why use a regular expression?
if line[-1] == '*':
yep(line)
else:
nope(line)
-tkc
--
https://mail.python.org/mailman/listinfo/python-list
On 2015-11-03 01:09, Seymore4Head wrote:
How do I make a regular expression that returns true if the end of the
line is an asterisk
To match an asterisk: \*
To match the end of a line: $
To match an asterisk at the end of a line: \*$
--
https://mail.python.org/mailman/listinfo/python-list
How do I make a regular expression that returns true if the end of the
line is an asterisk
--
https://mail.python.org/mailman/listinfo/python-list
Am 02.11.2015 um 22:06 schrieb Larry Hudson:
[snip a lot of text, also using the word intend...]
The word you want is indent not intend.
Oops. Of course you are right.
You might have noticed, english isn't my native language.
Not an excuse, but an explanation. ;-)
I can only hope, that Loek
On 26/10/15 01:17, Montana Burr wrote:
I'm looking for a library that will allow Python to listen for the
shriek of a smoke alarm. Once it detects this shriek, it is to notify
someone. Ideally, specificity can be adjusted for the user's
environment. For example, I expect to need moderate specific
On 11/02/2015 11:31 AM, Robin Koch wrote:
Am 02.11.2015 um 15:32 schrieb input/ldompel...@casema.nl:
Thank you for the explanation for it.
I must tell you that i yust beginning with python.
I bought the book beginning programming with python.
Have you programming experience with other langua
On Mon, Nov 2, 2015 at 12:24 PM, wrote:
> I have read some articles that returning None is not a good approach, so I am
> confused.
>
> How to handle exceptions properly in a pythonic way?
I'm having a hard time understanding what question you're asking. You
have a lot of discussion about where
In <4b303213-62e2-42d4-b2f6-4fc1f6025...@googlegroups.com> zljubi...@gmail.com
writes:
> Let's say that I have the following simple function:
> def get_html(url):
> wpage = requests.get(url)
>
> return wpage.text
> How to handle exceptions properly that can arise during execution
Am 02.11.2015 um 15:32 schrieb input/ldompel...@casema.nl:
Thank you for the explanation for it.
I must tell you that i yust beginning with python.
I bought the book beginning programming with python.
Have you programming experience with other languages?
Well, the very first thing you should
Let's say that I have the following simple function:
def get_html(url):
wpage = requests.get(url)
return wpage.text
How to handle exceptions properly that can arise during execution of the
requests.get(url)?
If I call this function with
try:
html = get_html('www.abc.com/index
Lee Bradley writes:
> http://pastebin.com/ndDYjYe1
We much prefer to discuss code in the context of plain text messages
right here, because this forum is archived longer than the expected
lifetime of content hosted on other services.
> For now I am looking for someone who can dig into this code
http://pastebin.com/ndDYjYe1
The above link takes you to a very interesting way of solving the classic game
of Bulls and Cows. It uses an entropy-based decision algorithm. I realize this
is asking a lot but I am not yet proficient enough in python to follow some of
the methods.
There is a fair
[cid:image001.png@01D11543.5ED11D50]
Wendy Robinson
Audit Analyst
(916) 566-4994 phone
NOTICE OF CONFIDENTIALITY: This email is for the sole use of the intended
recipient and may contain material that is confidential and protected by state
and federal regulations. If you are not the
On Sunday, November 1, 2015 at 2:48:58 PM UTC-7, Laura Creighton wrote:
> Actually, adding the XP - do not look here --
> message for several webpages has been on the pydotorg
> todo list for more than a week now.
>
> Not sure why it hasn't happened.
>
> Thank you for the reminder.
You're welcom
On Monday, November 2, 2015 at 10:21:46 AM UTC-5, MRAB wrote:
> On 2015-11-02 14:28, input/ldom...@casema.nl wrote:
> > He mike,
> >
> > Thank you or making this script.
> > Only I get errors for sleep.
> > I also tried to change it to time.sleep() but that also gives errors.
> >
> > File "test05.p
On 2015-11-02 14:28, input/ldompel...@casema.nl wrote:
He mike,
Thank you or making this script.
Only I get errors for sleep.
I also tried to change it to time.sleep() but that also gives errors.
File "test05.py", line 23
sleep(2)
^
SyntaxError: invalid syntax
On Monday, November 2, 2015 at 9:28:35 AM UTC-5, input/ld...@casema.nl wrote:
> He mike,
>
> Thank you or making this script.
> Only I get errors for sleep.
> I also tried to change it to time.sleep() but that also gives errors.
>
> File "test05.py", line 23
> sleep(2)
> ^
> SyntaxErr
On Nov 2, 2015 7:31 AM, "Gabe Clark" wrote:
>
> i am currently running python 3.5 in my programming class and when ever i
> go to open one of my saved files or a file saved by some one else this new
> tab pops up and says modify, repair, or uninstall i have uninstalled and
> repaired it multiple t
Thank you for the explanation for it.
I must tell you that i yust beginning with python.
I bought the book beginning programming with python.
In reply to "Dennis Lee Bieber" who wrote the following:
> On Mon, 02 Nov 2015 13:29:04 GMT, input/ldompel...@casema.nl declaimed the
> following:
Am 02.11.2015 um 13:35 schrieb Daniel Joffe:
Didn't you see the answers to your first posting? All of them earlier
than this.
Sibylle
--
https://mail.python.org/mailman/listinfo/python-list
He mike,
Thank you or making this script.
Only I get errors for sleep.
I also tried to change it to time.sleep() but that also gives errors.
File "test05.py", line 23
sleep(2)
^
SyntaxError: invalid syntax
---
i am currently running python 3.5 in my programming class and when ever i
go to open one of my saved files or a file saved by some one else this new
tab pops up and says modify, repair, or uninstall i have uninstalled and
repaired it multiple times to no success please help
--
https://mail.python.
On Tue, Nov 3, 2015 at 12:15 AM, beliavsky--- via Python-list
wrote:
> I think Python 2.x is still used more than Python 3.x in scientific
> computing. The Python books I have in this area, such as "Python for Finance:
> Analyze Big Financial Data" and "Python for Data Analysis", still use Pytho
On Monday, November 2, 2015 at 8:45:35 AM UTC-5, hakug...@gmail.com wrote:
> On Monday, November 2, 2015 at 8:29:26 AM UTC-5, input/ld...@casema.nl wrote:
> > I tried to use def loop(): now for to restart the script.
> > but its only restart "fwd()" print ("forward 1x") and then stop.
> > It does n
On Monday, November 2, 2015 at 8:29:26 AM UTC-5, input/ld...@casema.nl wrote:
> I tried to use def loop(): now for to restart the script.
> but its only restart "fwd()" print ("forward 1x") and then stop.
> It does not look further for the if function.
> Is there another way to restart this script
I tried to use def loop(): now for to restart the script.
but its only restart "fwd()" print ("forward 1x") and then stop.
It does not look further for the if function.
Is there another way to restart this script ?
I also tried with (while True:) but that does nothing.
Thanks
---
I think Python 2.x is still used more than Python 3.x in scientific computing.
The Python books I have in this area, such as "Python for Finance: Analyze Big
Financial Data" and "Python for Data Analysis", still use Python 2.x . An
aspiring computational scientist, data scientist, or financial q
--
https://mail.python.org/mailman/listinfo/python-list
On 11/2/2015 12:45 AM, Ben Finney wrote:
amn...@gmail.com writes:
I need a help in completing the Class Roaming problem using Euclidean
function , Completing the Class Node .
I think you need to research how to solve this algorithm, and only
*then* think about how to code it in Python.
I
On 02.11.2015 11:48, Wolfgang Maier wrote:
Since Python3.3, the print function has a flush keyword argument that
accepts a boolean and lets you do just this. Rewrite your example as:
import sys, time
def test():
# Simulate a slow calculation that prints status and/or error
# messages to stderr
On 02.11.2015 08:52, Steven D'Aprano wrote:
In Python 2, stderr is unbuffered.
In most other environments (the shell, C...) stderr is unbuffered.
It is usually considered a bad, bad thing for stderr to be buffered. What
happens if your application is killed before the buffer fills up? The error
On 2 November 2015 at 09:28, Dave Farrance wrote:
> Yes, I've read the justifications. Why list all the non-supported OSs?
> And the explanation about each version of Python being supported just
> for the supported versions of Windows upon its release is in the
> documentation -- somewhere. But i
On 02/11/2015 06:16, Tim Golden wrote:
> On 02/11/2015 00:08, Daniel Joffe wrote:
>> WinXP...32 bits...professional
>>
>> I keep getting message
>>
>>
>> note also that there is no place on the install box to start...you just
>> click somewhere, and the install started.
>>
>
> I'm afraid you've be
Tim Golden wrote:
>I'm afraid you've been bitten by the fact that we no longer support
>Windows XP and haven't communicated this very well. We have a new
>version of the installer almost ready for release which indicates this
>much earlier (and more obviously). I'm afraid if you're on XP you'r
In Python 2, stderr is unbuffered.
In most other environments (the shell, C...) stderr is unbuffered.
It is usually considered a bad, bad thing for stderr to be buffered. What
happens if your application is killed before the buffer fills up? The errors
in the buffer will be lost.
So how come P
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