comp.lang.python Google Group

Re: I passed a fizzbuzz test but failed at recursion.

tjre...@udel.edu (Terry Reedy) — Wed, 10 Mar 2010 17:52:47 UT

In all 3 branches, 'is' should be '=='. As written, this code depends on
the implementation treating 0 as a singleton, which CPython does as an
optimization, but which the language def does not require.
If one reversed the string addition in each branch, it would.
As written, the 'word' for n is tacked on at the end.

Re: Calculating very large exponents in python

dicki...@gmail.com (Mark Dickinson) — Wed, 10 Mar 2010 17:51:23 UT

Whoops---I missed this. I'm too slow! But at least my answers agree
with yours. (Factoring 10**78+1 took around 7 seconds using GP/Pari
on a 2.5 GHz MacBook; factoring the remaining quotient n / (10**78+1)
was much quicker.)

Python 2.6.5 release candidate 2 now available

ba...@python.org (Barry Warsaw) — Wed, 10 Mar 2010 17:50:10 UT

Hi everyone,
The source tarballs and Windows installer for Python 2.6.5 release candidate 2
are now available:
[link]
As usual, please download, install, and test them with your favorite projects
and environments. A number of regressions and build problems on OS X have

Re: Calculating very large exponents in python

dicki...@gmail.com (Mark Dickinson) — Wed, 10 Mar 2010 17:47:19 UT

The complete factorization is: 101 x 521 x 3121 x 9901 x 36479 x
300623 x 53397071018461 x 1900381976777332243781 x
606051786031039803398561192172 1 x
994180836742593577430698877602 162911139953691479055102244799 4642391
It helps if you notice that the digits of the original 156-digit
number come from concatenating a 78-digit string to itself, giving an

Re: Can't define call within init?

duncan.bo...@invalid.invalid (Duncan Booth) — Wed, 10 Mar 2010 17:39:27 UT

If you want different behaviour its usually best to use different classes.
You can keep all the common behaviour in a base class and just override the
__call__ method for the different behaviour. Then use a factory function to
decide which class to instantiate or else override __new__ and make the

Re: NoSQL Movement?

duncan.bo...@invalid.invalid (Duncan Booth) — Wed, 10 Mar 2010 17:26:46 UT

No, I'm saying that if you plan to build a business that could grow you
should be clear up front how you plan to handle the growth. It's too late
if you suddenly discover your platform isn't scalable just when you need to
scale it.

Re: equivalent of Ruby's Pathname?

c...@rebertia.com (Chris Rebert) — Wed, 10 Mar 2010 17:15:07 UT

The next closest thing would probably be the Python Cookbook:
[link]
However, such stuff can also be found as third-party modules.
Cheers,
Chris

Re: equivalent of Ruby's Pathname?

phlip2...@gmail.com (Phlip) — Wed, 10 Mar 2010 16:54:51 UT

In terms of trying too hard to achieve perfection, am I missing a
Python repository similar to the C++ Boost project? All the nice-to-
have classes that extend the core of C++ get to live in Boost before
the C++ Committee pulls the best ideas off the top and add them to the
Standard Library...

Re: Anything like "Effective Java" for Python?

ch...@simplistix.co.uk (Chris Withers) — Wed, 10 Mar 2010 16:46:23 UT

kj wrote:
oxymoronic, no?
Sorry, couldn't resist ;-)
Chris

Re: Interacting With Another Script

inva...@invalid.invalid (Grant Edwards) — Wed, 10 Mar 2010 16:44:29 UT

That depends on the program. Some programs that prompt for input
(particulary username/password) flush stdin before displaying each
prompt. I'm not saying the program in question does that...
That doesn't mean that data written prior to the prompt won't be
ignore.
It's worth trying, but there's a slight chance it won't work.

Re: Interacting With Another Script

c...@rebertia.com (Chris Rebert) — Wed, 10 Mar 2010 16:39:57 UT

There's no magical "prompt time". The process's stdin's openness to
writing is not conditional.
Just send it all the input at once with the proper newlines in place
and it should work just fine assuming the user input was valid
(barring vpopmail using some fancy terminal input malarkey like
curses).

Re: Interacting With Another Script

c...@rebertia.com (Chris Rebert) — Wed, 10 Mar 2010 16:31:06 UT

(assuming TTW = Thru The Web; been a while since I've come across an
unknown, non-new acronym)
[Disclaimer: I know zilch about vpopmail's specifics]
Option A. Check for when the latest output looks prompt-like (e.g.
colon followed by a space; this will be program-specific and possibly
different for vpopmail) and then ask for input. For example:

Re: I passed a fizzbuzz test but failed at recursion.

chris.hu...@gmail.com (Chris Hulan) — Wed, 10 Mar 2010 16:24:00 UT

There's only one print, it prints the string returned by fizzbuzz(100)
The string is constructed via recursion
ie:
fizzbuzz(6)
fizzbuzz(5)
fizzbuzz(4)
fizzbuzz(3)
fizzbuzz(2)
fizzbuzz(1)
fizzbuzz(0)
''+'1 \n'
'1 \n'+'2 \n'
'1 \n2 \n'+'fizz \n'
'1 \n2 \n fizz \n'+'4 \n'

Re: os.rename [Errno 31] Too many links

h...@tbz-pariv.de (Thomas Guettler) — Wed, 10 Mar 2010 16:08:44 UT

If you are on linux you can have a look at the open file descriptors of
a running process like this:
ls -l /proc/PID/fd/
But I guess it is a limitation of your filesystem. What do you use?
I once had this problem with ext2. It has a low limit for
subdirectories.
With xfs the limits are much greater.

I passed a fizzbuzz test but failed at recursion.

bsag...@gmail.com (Bill) — Wed, 10 Mar 2010 15:55:27 UT

Look at this recursive fizzbuzz function from
[link]
def fizzbuzz(num):
if num:
if num % 15 is 0: return fizzbuzz(num-1) + 'fizzbuzz \n'
elif num % 5 is 0: return fizzbuzz(num-1) + 'buzz \n'
elif num % 3 is 0: return fizzbuzz(num-1) + 'fizz \n'

comp.lang.python Google Group

Re: I passed a fizzbuzz test but failed at recursion.

Re: Calculating very large exponents in python

Python 2.6.5 release candidate 2 now available

Re: Calculating very large exponents in python

Re: Can't define __call__ within __init__?

Re: NoSQL Movement?

Re: equivalent of Ruby's Pathname?

Re: equivalent of Ruby's Pathname?

Re: Anything like "Effective Java" for Python?

Re: Interacting With Another Script

Re: Interacting With Another Script

Re: Interacting With Another Script

Re: I passed a fizzbuzz test but failed at recursion.

Re: os.rename [Errno 31] Too many links

I passed a fizzbuzz test but failed at recursion.

Re: Can't define call within init?