On Thu, May 16, 2013 at 1:42 AM, eryksun wrote:
> On the other hand a BufferedWriter will buffer the remaining 3000
> bytes that can't be written. You won't find out until an exception is
> raised when the file is closed:
Actually it was buffering all 4000 bytes. I forgot about the fast path
that
On Wed, May 15, 2013 at 8:07 PM, Steven D'Aprano wrote:
> On 16/05/13 06:02, Alan Gauld wrote:
>>
>> And C's printf() returns the number of chars printed.
>> I actually wish python had followed suit because, as Marc says,
>> it can occasionally be useful...
>
> Guido's time machine strikes again.
On Wed, May 15, 2013 at 5:07 PM, Steven D'Aprano wrote:
> Guido's time machine strikes again.
>
>
> py> import sys
> py> sys.stdout.write('NOBODY expects the Spanish Inquisition!\n')
> NOBODY expects the Spanish Inquisition!
> 40
>
>
> The write() method of file objects in Python 3 return the num
On 16/05/13 06:02, Alan Gauld wrote:
On 15/05/13 16:51, Marc Tompkins wrote:
Actually, I was mixing up my memory of an overloaded print() function
And C's printf() returns the number of chars printed.
I actually wish python had followed suit because, as Marc says,
it can occasionally be usefu
On 16/05/13 00:18, Marc Tompkins wrote:
On Wed, May 15, 2013 at 3:52 PM, Marc Tompkins mailto:marc.tompk...@gmail.com>> wrote:
I was thinking along the lines of an optional parameter ("verbose"
or something similar), so print() would supply a return value if you
asked it to but keep
On Wed, May 15, 2013 at 4:14 PM, Oscar Benjamin
wrote:
> I don't really understand what the reason for having the information
> is. Would it return the number of characters written or the number of
> bytes?
>
It's absolutely useless in an interactive session, or any time that print()
is printing
On Wed, May 15, 2013 at 3:52 PM, Marc Tompkins wrote:
> I was thinking along the lines of an optional parameter ("verbose" or
> something similar), so print() would supply a return value if you asked it
> to but keep stumm if you didn't.
>
After I hit Send, I thought of the obvious problem... y
On 15 May 2013 23:52, Marc Tompkins wrote:
> On Wed, May 15, 2013 at 3:43 PM, Oscar Benjamin
> wrote:
>>
>> On 15 May 2013 22:21, Marc Tompkins wrote:
>> > On Wed, May 15, 2013 at 1:02 PM, Alan Gauld
>> > wrote:
>> >>
>> >> And C's printf() returns the number of chars printed.
>> >> I actually
On Wed, May 15, 2013 at 3:43 PM, Oscar Benjamin
wrote:
> On 15 May 2013 22:21, Marc Tompkins wrote:
> > On Wed, May 15, 2013 at 1:02 PM, Alan Gauld
> > wrote:
> >>
> >> And C's printf() returns the number of chars printed.
> >> I actually wish python had followed suit because, as Marc says,
> >>
On 15 May 2013 22:21, Marc Tompkins wrote:
> On Wed, May 15, 2013 at 1:02 PM, Alan Gauld
> wrote:
>>
>> And C's printf() returns the number of chars printed.
>> I actually wish python had followed suit because, as Marc says,
>> it can occasionally be useful...
>>
>
> I wonder if this would be a g
On Wed, May 15, 2013 at 1:02 PM, Alan Gauld wrote:
> On 15/05/13 16:51, Marc Tompkins wrote:
>
> Actually, I was mixing up my memory of an overloaded print() function
>>
>
> And C's printf() returns the number of chars printed.
> I actually wish python had followed suit because, as Marc says,
> i
On 15/05/13 16:51, Marc Tompkins wrote:
Actually, I was mixing up my memory of an overloaded print() function
And C's printf() returns the number of chars printed.
I actually wish python had followed suit because, as Marc says,
it can occasionally be useful...
--
Alan G
Author of the Learn to
On Wed, May 15, 2013 at 2:26 AM, Steven D'Aprano wrote:
I assumed Marc was talking hypothetically. A print function *could*
> return a result, even if Python's print function does not.
>
> Actually, I was mixing up my memory of an overloaded print() function with
Python's built-in print(). I _hav
On Wed, May 15, 2013 at 10:03:20AM +0100, Oscar Benjamin wrote:
> On 14 May 2013 17:11, Marc Tompkins wrote:
> > Again, the return value of print() - e.g. success/failure - is
> > separate from what print() actually prints.
>
>
> I was surprised by this so I've just tested it and checked the d
On 14 May 2013 17:11, Marc Tompkins wrote:
>
> The OP expressed some confusion between what a function DOES and what it
> RETURNS. It occurs to me that the print() function (or, more generically,
> ANY print() function - it doesn't have to be Python 3) is a good
> demonstration.
>
> Our first
On Tue, May 14, 2013 at 1:51 AM, Alan Gauld wrote:
> On 14/05/13 00:01, Daniel Magruder wrote:
>
> I am still confused as what return does.
>>
>
> This isn't a direct response to Alan, but to something the OP expressed
many, many messages ago...
The OP expressed some confusion between what a fun
On 14/05/13 00:01, Daniel Magruder wrote:
I am still confused as what return does.
Having seen the other replies I'll try a slightly
different explanation.
All programs are formed by a hierarchy of functions.
You start with a top level driver block which then utilizes or calls
helper functio
On 14/05/13 02:37, Dave Angel wrote:
def counting_primes():
primelist = []
for prime in range(2,1000):
if isprime(prime):
primelist.append(prime)
return primelist
Actually no, since the OP's looking for the first 1000 primes not for
all the primes under 1000.
Ah
(Please don't top-post. And don't reply privately, as I'm not the only
one reading this thread. Post the reply to the list, as you did last
time with your reply-all)
On 05/13/2013 09:45 PM, Daniel Magruder wrote:
Dear Dave,
I don't have a clue what you're confused about. Do you not unders
On 05/13/2013 07:55 PM, Alan Gauld wrote:
On 14/05/13 00:01, Daniel Magruder wrote:
That seems OK but it would be simpler with a for loop:
def counting_primes():
primelist = []
for prime in range(2,1000):
if isprime(prime):
primelist.append(prime)
return pr
On 05/13/2013 07:01 PM, Daniel Magruder wrote:
Dear Dave,
I am using python 2.
I am still confused as what return does. What does it mean if a
> function returns True to the caller? What is the caller?
Have you ever used (called) a function? If so, you've written a caller.
For example, if
On Mon, May 13, 2013 at 5:13 PM, Marc Tompkins wrote:
> In fact, you could shorten your isodd() function to:
> > def isodd(candidate):
> >return candidate%2 !=0:
> and it would function identically.
>
Sorry - that should be
> def isodd(candidate):
>return candidate%2 !=0
_
On Mon, May 13, 2013 at 4:01 PM, Daniel Magruder wrote:
> Dear Dave,
> I am using python 2.
> I am still confused as what return does. What does it mean if a function
> returns True to the caller? What is the caller?
>
You've defined a function - isodd - but it doesn't automatically execute.
It
On 14/05/13 00:01, Daniel Magruder wrote:
I am still confused as what return does.
> What does it mean if a function returns True to the caller?
> What is the caller?
The caller is the program code that calls the function.
For example if I write a function
def square(x):
return x*x
and w
Dear Dave,
I am using python 2.
I am still confused as what return does. What does it mean if a function
returns True to the caller? What is the caller?
Your code worked for returning a list of 1000 items of odd numbers, so I then
tried writing a code to replay isodd to give True or False for is
On Sun, May 12, 2013 at 9:43 PM, Dave Angel wrote:
> On 05/11/2013 09:58 PM, Daniel Magruder wrote:
>
> Please respond to the list, not the individual. Otherwise you're robbing
> yourself and others of the possibility of learning from and helping multiple
> people. I don't mind if you ALSO reply
On Sun, May 12, 2013 at 6:43 AM, Dave Angel wrote:
[...]
> With no experience in programming other languages, you'd need a different
> kind of tutorial than I sought when I was learning Python. And you
> absolutely need to match your tutorial against the version of Python you're
> running on your
On 12/05/13 12:43, Dave Angel wrote:
Despite going to many sources I can not seem to find a single source
that adequately explains Python 100% without any technical jargon or
assumptions of prior knowledge.
Its impossible to learn to program without learning technical jargon,
but there are tu
On 05/11/2013 09:58 PM, Daniel Magruder wrote:
Please respond to the list, not the individual. Otherwise you're
robbing yourself and others of the possibility of learning from and
helping multiple people. I don't mind if you ALSO reply to me (which is
what reply-all does by default), but man
On 05/11/2013 04:44 PM, Daniel Magruder wrote:
Dear Tutor at Python.org,
I am new to the python language and have been teaching myself through various
online resources. I found an exercise where I am to create a program that
prints a list of the first 1000 prime numbers. After many attempts and
Dear Tutor at Python.org,
I am new to the python language and have been teaching myself through various
online resources. I found an exercise where I am to create a program that
prints a list of the first 1000 prime numbers. After many attempts and looking
at other answers for other ways around
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