My all-time favourite is Programming in Python 3 (Mark Summerfield)
http://www.qtrac.eu/py3book.html
Most of it is not for absolute beginners. Some of the chapters contain stuff I
still cannot wrap my brain around. I believe the chapter about regexes (which
is
VERY good) is freely downloadable
Hi everyone,
I'm designing a timeline. When the user presses the right arrow, 0.1 is
added to the current position. The user can add events to the timeline, and
can later scroll back across those events to see what they are. But
something I absolutely don't understand is happening:
I used the progr
> dictionary = {3.1014: value, 2.1005: value,
> 1.0999: value}
> Why is this happening? The output is telling me 3.1, but the value isn't
It's a quirk of how computers store floating point numbers.
While humans mentally tend to treat everything as characters (a
Ryan Strunk wrote:
Hi everyone,
I'm designing a timeline. When the user presses the right arrow, 0.1 is
added to the current position. The user can add events to the timeline, and
can later scroll back across those events to see what they are. But
something I absolutely don't understand is happen
> * Or you just get used to the fact that some numbers are not exact in
> floating point.
This got me thinking. How many decimal places do you need to
accurately, say, aim a laser somewhere in a 180 degree arc accurately
enough to hit a dime on the surface of the moon?
Alan
___
Dnia 11-06-2011 o 17:51:03 Piotr Kamiński napisał(a):
Dnia 11-06-2011 o 17:30:50 Alan Gauld
napisał(a):
"Piotr Kamiński" wrote
This is a *technical* list, as I understand it, solely dedicated to
...
Since this seems to be something we can all agree on
can we consider this discussion
Hi Alan,
>> * Or you just get used to the fact that some numbers are not exact in
>> floating point.
>
> This got me thinking. How many decimal places do you need to
> accurately, say, aim a laser somewhere in a 180 degree arc accurately
> enough to hit a dime on the surface of the moon?
Here i
Having followed this absurd thread from its beginning hopefully to this, the
end of it. Everyone replying to your diatribe has been incredibly polite to
you. One of the moderators tried to explain the obvious to you. This is a
Python group. Python is to most of us a delightful language. To other
Hi,
I tried using the "wb" to create and write the file. In a simple test I did
to open an existing jpg file I know is good, putting the data in my new file
and closing it, it worked.
I don't have access to the camera now, but will try it tomorrow.
Thanks
Johan
-Original Message-
From
>> * Or you just get used to the fact that some numbers are not exact in
>> floating point.
>
> This got me thinking. How many decimal places do you need to
> accurately, say, aim a laser somewhere in a 180 degree arc accurately
> enough to hit a dime on the surface of the moon?
>
> Alan
In short:
Hi all,
I am newbie and want to know what is the difference between subprocess.Popen()
and subprocess.call() ?
when is it best to use each one?
Any help appreciated!!
Regards,
Neha___
Tutor maillist - Tutor@python.org
To unsubscribe or change subsc
Hi
I am looking for recommendations for Report writers under Python. Current
reports are in Crystal reports if that is an option.
Any suggestions are welcome.
Thanks
Mark
___
Tutor maillist - Tutor@python.org
To unsubscribe or cha
"Neha P" wrote
I am newbie and want to know what is the difference
between subprocess.Popen() and subprocess.call() ?
Simply speaking, call() is a way to make subprocess
easier to use. Popen gives you much more powerful
options but that flexibility means it's harder to use.
when is it b
Robert Sjoblom wrote:
* Or you just get used to the fact that some numbers are not exact in
floating point.
This got me thinking. How many decimal places do you need to
accurately, say, aim a laser somewhere in a 180 degree arc accurately
enough to hit a dime on the surface of the moon?
Alan
Mark Cowley - FlexSystems wrote:
Hi
I am looking for recommendations for Report writers under Python. Current
reports are in Crystal reports if that is an option.
Any suggestions are welcome.
You might get more responses on the main python mailing list,
python-l...@python.org, or comp.la
On Sun, Jun 12, 2011 at 9:11 PM, Steven D'Aprano wrote:
> Robert Sjoblom wrote:
>
>> * Or you just get used to the fact that some numbers are not exact in
floating point.
>>> This got me thinking. How many decimal places do you need to
>>> accurately, say, aim a laser somewhere in a 180
> Python's floats have 52 *binary* places of precision, or approximately
> 15 *decimal* places. So even though we may not be able to physically
> build a machine capable of aiming a laser to a precision of
> 0.001 degrees, at least we can be comforted by the knowledge
> that a C double o
17 matches
Mail list logo
