On Sun, Jan 18, 2015 at 02:20:55PM -0800, Danny Yoo wrote:
> Just to add, log(0) is mathematically undefined.
> https://en.m.wikipedia.org/wiki/Logarithm.
For the record, IEEE-754 specifies that log(0.0) should return -INF.
That's what Decimal does:
py> from decimal import Decimal
py> Decimal(0)
Just to add, log(0) is mathematically undefined.
https://en.m.wikipedia.org/wiki/Logarithm.
So depending on the problem's context, it might be worth asking why log is
being applied on this input. Is such input expected? Make sure the code
isn't trying to correct for input that shouldn't be there
- Original Message -
> From: Peter Otten <__pete...@web.de>
> To: tutor@python.org
> Cc:
> Sent: Sunday, January 18, 2015 4:38 AM
> Subject: Re: [Tutor] selecting data from a list
>
> Colin Ross wrote:
>
>> Hi all,
>>
>> I am attempting to isolate a certain subset of data from the
On 18/01/2015 00:49, Colin Ross wrote:
Hi all,
I am attempting to isolate a certain subset of data from the list "a" and
then turn it into any array. To do so, I have written the following code:
import numpy as np
a = [0,1,2,3,4,5,6,7,8,9,10]
b = [10,20,30,40,50,60,70,80,90,100,110]
for a in
On 18/01/2015 13:41, Asokan Pichai wrote:
On Sun, Jan 18, 2015 at 6:50 PM, Sydney Shall mailto:s.sh...@virginmedia.com>> wrote:
I am a beginner and I have a question of syntax.
Welcome!
I am just learning to use list comprehension, which oc course, I
find very helpful indeed.
On 18/01/15 13:20, Sydney Shall wrote:
I am a beginner and I have a question of syntax.
Please don't hijack an existing thread.
Simply changing the subject line is not enough.
Always send a new mail to tutor@python.org to
start a new discussion.
Otherwise the new discussion gets interleaved wi
On 18/01/15 13:20, Sydney Shall wrote:
The problem is I am occasionally getting exactly zeros when I need to
obtain the logarithm of the number.
for i in range(len(cap)):
Its usually better to iterate over the collection rather than use indexing:
for item in cap:
if cap[i] == 0.0:
On Sun, Jan 18, 2015 at 6:50 PM, Sydney Shall
wrote:
> I am a beginner and I have a question of syntax.
>
Welcome!
>
> I am just learning to use list comprehension, which oc course, I find very
> helpful indeed.
>
> However, I am stuck with a specific problem of how to incorporate an else
> in
On 18/01/2015 13:20, Sydney Shall wrote:
I am a beginner and I have a question of syntax.
I am just learning to use list comprehension, which oc course, I find
very helpful indeed.
However, I am stuck with a specific problem of how to incorporate an
else in a list comp-rehension. I cannot do it
I am a beginner and I have a question of syntax.
I am just learning to use list comprehension, which oc course, I find
very helpful indeed.
However, I am stuck with a specific problem of how to incorporate an
else in a list comp-rehension. I cannot do it.
The following snippet of code does
On 18/01/15 12:29, Suhail Mahmood wrote:
Hi, everyone
Can I get my questions on python, and maybe some frameworks
> of python like pyqt, answered here?
This group is primarily for beginners to Python, as such,
questions about using the Python language, general programming
principles and the Pyt
Hi, everyone
Can I get my questions on python, and maybe some frameworks of python like
pyqt, answered here? Sorry but I am not sure of it if this is right place for
questions on something like pyqt as that is what I need right now. If not can
you please refer to somewhere where I can get my ans
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