On Tue, Dec 10, 2013 at 1:08 PM, spir wrote:
> There is another standard tool called 'apply' in general, which sequentially
> *performms* the effect of an action on a sequence of inputs. Since it just
> applies action, 'apply' does not return any result. 'apply' is rarely used
> (even more than ma
On 10/12/2013 18:08, spir wrote:
There is another standard tool called 'apply' in general, which
sequentially *performms* the effect of an action on a sequence of
inputs.
The apply function has been deprecated since 2.3 and never got into
Python 3.
--
My fellow Pythonistas, ask not what our
On 12/10/2013 02:31 PM, Rafael Knuth wrote:
Hej Steven,
thanks for the clarification.
I have two questions - one about map function and the other about return.
So, in mathematics we might have a mapping between (let's say) counting
numbers 1, 2, 3, 4, ... and the even numbers larger than fifty
On 12/10/2013 02:31 PM, Rafael Knuth wrote:
Hej Steven,
thanks for the clarification.
I have two questions - one about map function and the other about return.
So, in mathematics we might have a mapping between (let's say) counting
numbers 1, 2, 3, 4, ... and the even numbers larger than fifty
On Tue, Dec 10, 2013 at 02:31:55PM +0100, Rafael Knuth wrote:
> > So in Python, we can do this with map. First we define a function to do
> > the transformation, then pass it to map:
> >
> > def transform(n):
> > return 50 + 2*n
Notice here that transformation function takes *one* value, and
Hej Steven,
thanks for the clarification.
I have two questions - one about map function and the other about return.
> So, in mathematics we might have a mapping between (let's say) counting
> numbers 1, 2, 3, 4, ... and the even numbers larger than fifty, 52, 54,
> 56, ... and so on. The mapping
[off-topic]
On 12/10/2013 01:39 PM, Wolfgang Maier wrote:
def digits(n):
"""Generator that breaks down an integer into digits from right to left."""
while n>0:
yield n % 10
n //= 10
Aha! one more sign that we write numbers backwards!
Denis
_
Steven D'Aprano pearwood.info> writes:
>
> On Tue, Dec 10, 2013 at 10:39:34AM +0100, Rafael Knuth wrote:
>
> > def DigSum (integer):
> > s = 0
> > while integer != 0:
> > integer, remainder = divmod(integer, 10)
> > s += remainder
> > print(s)
>
> A thought comes to
On 12/10/2013 11:56 AM, Steven D'Aprano wrote:
This is because the function does *two things*, when it should do one.
First it calculates the digit sum, and then it prints it.
print's inside functions are a sign of debug not completely cleaned ;-)
(and also a sign that test funcs do not provid
Asokan Pichai talentsprint.com> writes:
>
> If you liked it, I will give you one that uses one less variable
>
> def digitSum(n):
> dsum = 0
> while n > 0:
> dsum += n % 10
>
> n /= 10
> return dsum
>
> Stupid of me not to have mentioned that this Pyt
On Tue, Dec 10, 2013 at 10:39:34AM +0100, Rafael Knuth wrote:
> def DigSum (integer):
> s = 0
> while integer != 0:
> integer, remainder = divmod(integer, 10)
> s += remainder
> print(s)
A thought comes to mind... an very important lesson is to learn the
difference be
On Tue, Dec 10, 2013 at 4:06 PM, Asokan Pichai wrote:
>
>
>
> On Tue, Dec 10, 2013 at 3:09 PM, Rafael Knuth wrote:
>
>> Hej there,
>>
>> > I don't know if everyone would consider this more elegant but it's
>> > certainly shorter:
>>
>> Thanks!
>>
>> def DigitSum(YourNumber):
>> > ... retu
On Tue, Dec 10, 2013 at 3:09 PM, Rafael Knuth wrote:
> Hej there,
>
> > I don't know if everyone would consider this more elegant but it's
> > certainly shorter:
>
> Thanks!
>
> def DigitSum(YourNumber):
> > ... return sum(map(int, YourNumber))
> > ...
> DigitSum('55')
> > 10
>
> I d
On Tue, Dec 10, 2013 at 10:39:34AM +0100, Rafael Knuth wrote:
> I don't understand yet what the "map" function does - can you explain?
> I read the Python 3.3.0 documentation on that topic but I frankly
> didn't really understand it
The "map" function comes from so-called functional programming
On 10 December 2013 09:39, Rafael Knuth wrote:
>
> def DigitSum(YourNumber):
>> ... return sum(map(int, YourNumber))
>> ...
> DigitSum('55')
>> 10
>
> I don't understand yet what the "map" function does - can you explain?
> I read the Python 3.3.0 documentation on that topic but I fran
Hej there,
> I don't know if everyone would consider this more elegant but it's
> certainly shorter:
Thanks!
def DigitSum(YourNumber):
> ... return sum(map(int, YourNumber))
> ...
DigitSum('55')
> 10
I don't understand yet what the "map" function does - can you explain?
I read the
On 12/09/2013 09:27 PM, Alan Gauld wrote:
On 09/12/13 17:57, Roel Schroeven wrote:
You are right in a sense, but this is what int() does, isn't it?
No. int() can be done in several ways...
spir should have said "..., but this is what str() does, ..." I think.
Doh! Yes, that makes sense I
On 09/12/13 22:28, Dave Angel wrote:
On Mon, 09 Dec 2013 20:27:38 +, Alan Gauld
wrote:
Incidentally, I just remembered another completely different
way to do it, although I can't recall how it works!
Unfortunately it doesn't work for 10, 20, ...
Ah, I knew it must be too good to be tru
On Mon, 09 Dec 2013 20:27:38 +, Alan Gauld
wrote:
Incidentally, I just remembered another completely different
way to do it, although I can't recall how it works! Maybe one
of the math gurus can explain it, and how to extend it. This
version only works for 2 digit numbers... and has a huge g
On 09/12/13 17:57, Roel Schroeven wrote:
You are right in a sense, but this is what int() does, isn't it?
No. int() can be done in several ways...
spir should have said "..., but this is what str() does, ..." I think.
Doh! Yes, that makes sense I should have realized.
All in all I think
Alan Gauld schreef:
On 09/12/13 13:48, spir wrote:
On 12/09/2013 02:29 PM, Wolfgang Maier wrote:
spir gmail.com> writes:
Tu sum it up (aha!): you algorithm is the right and only one
No, it's not the only one. ...
also the pure numbers approach pointed out by me and Alan.
You are right in
On Mon, 09 Dec 2013 17:00:49 +0100, spir wrote:
On 12/09/2013 03:49 PM, Alan Gauld wrote:
> On 09/12/13 13:48, spir wrote:
>> On 12/09/2013 02:29 PM, Wolfgang Maier wrote:
>> You are right in a sense, but this is what int() does, isn't it?
> No. int() can be done in several ways but usually it
On 12/09/2013 03:49 PM, Alan Gauld wrote:
On 09/12/13 13:48, spir wrote:
On 12/09/2013 02:29 PM, Wolfgang Maier wrote:
spir gmail.com> writes:
Tu sum it up (aha!): you algorithm is the right and only one
No, it's not the only one. ...
also the pure numbers approach pointed out by me and A
On 09/12/13 13:48, spir wrote:
On 12/09/2013 02:29 PM, Wolfgang Maier wrote:
spir gmail.com> writes:
Tu sum it up (aha!): you algorithm is the right and only one
No, it's not the only one. ...
also the pure numbers approach pointed out by me and Alan.
You are right in a sense, but this i
spir gmail.com> writes:
>
> On 12/09/2013 02:29 PM, Wolfgang Maier wrote:
> > spir gmail.com> writes:
> >
> >>
> >> Tu sum it up (aha!): you algorithm is the right and only one
> >
> > No, it's not the only one. It's certainly the most obvious one, but there is
> > also the pure numbers approac
On 12/09/2013 02:29 PM, Wolfgang Maier wrote:
spir gmail.com> writes:
Tu sum it up (aha!): you algorithm is the right and only one
No, it's not the only one. It's certainly the most obvious one, but there is
also the pure numbers approach pointed out by me and Alan.
You are right in a sen
On 12/09/2013 02:42 PM, Rafael Knuth wrote:
Tu sum it up (aha!): you algorithm is the right and only one
No, it's not the only one. It's certainly the most obvious one, but there is
also the pure numbers approach pointed out by me and Alan.
So far I received 7 different alternative suggestion
>> Tu sum it up (aha!): you algorithm is the right and only one
>
> No, it's not the only one. It's certainly the most obvious one, but there is
> also the pure numbers approach pointed out by me and Alan.
So far I received 7 different alternative suggestions, both pure
numbers & mixed int/str app
spir gmail.com> writes:
>
> Tu sum it up (aha!): you algorithm is the right and only one
No, it's not the only one. It's certainly the most obvious one, but there is
also the pure numbers approach pointed out by me and Alan.
___
Tutor maillist -
On 12/09/2013 09:08 AM, Rafael Knuth wrote:
Hej there,
I wrote a program that converts an integer into a digit sum:
def DigitSum(YourNumber):
DigitList = []
YourNumber = str(YourNumber)
for i in YourNumber:
DigitList.append(int(i))
print(sum(DigitList))
DigitSum(55
On 09/12/13 08:08, Rafael Knuth wrote:
def DigitSum(YourNumber):
DigitList = []
YourNumber = str(YourNumber)
for i in YourNumber:
DigitList.append(int(i))
print(sum(DigitList))
DigitSum(55)
10
It actually works but I was wondering if that's the only way to solve
th
On 9 December 2013 08:08, Rafael Knuth wrote:
> Hej there,
>
> I wrote a program that converts an integer into a digit sum:
>
> def DigitSum(YourNumber):
> DigitList = []
> YourNumber = str(YourNumber)
> for i in YourNumber:
> DigitList.append(int(i))
> print(sum(DigitList)
Rafael Knuth gmail.com> writes:
>
> Hej there,
>
> I wrote a program that converts an integer into a digit sum:
>
> def DigitSum(YourNumber):
> DigitList = []
> YourNumber = str(YourNumber)
> for i in YourNumber:
> DigitList.append(int(i))
> print(sum(DigitList))
>
> D
Thanks, guys - got it! I was suspecting that my solution is too
complex and that there must be a simpler way to convert integers into
a digit sum. Have a great morning/day/evening, Raf
On Mon, Dec 9, 2013 at 9:23 AM, Amit Saha wrote:
> On Mon, Dec 9, 2013 at 6:08 PM, Rafael Knuth wrote:
>> Hej t
On Mon, Dec 9, 2013 at 1:38 PM, Rafael Knuth wrote:
> Hej there,
>
> I wrote a program that converts an integer into a digit sum:
>
> def DigitSum(YourNumber):
> DigitList = []
> YourNumber = str(YourNumber)
> for i in YourNumber:
> DigitList.append(int(i))
> print(sum(Dig
On Mon, Dec 9, 2013 at 6:08 PM, Rafael Knuth wrote:
> Hej there,
>
> I wrote a program that converts an integer into a digit sum:
>
> def DigitSum(YourNumber):
> DigitList = []
> YourNumber = str(YourNumber)
> for i in YourNumber:
> DigitList.append(int(i))
> print(sum(Digi
Hej there,
I wrote a program that converts an integer into a digit sum:
def DigitSum(YourNumber):
DigitList = []
YourNumber = str(YourNumber)
for i in YourNumber:
DigitList.append(int(i))
print(sum(DigitList))
DigitSum(55)
>>>
10
It actually works but I was wondering if
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