On Wed, Feb 15, 2017 at 09:36:02PM +0330, elham khanchebemehr wrote:
> Hi,
> I'm trying to write a code in python that takes an array of integers as
> sources, an array of integers as sinks, and an array of an array of
> integers of capacities, returning the maximum flow. I'm new to python and I
>
Hi so I figured out my problem, with this code and its working great but
its still taking a very long time to process...I was wondering if there was
a way to do this with just regular expressions instead of parsing the text
with lxml...
the idea would be to identify a tag and then move to the nex
>
> So I got my code working now and it looks like this
>
> TAG = '{http://www.mediawiki.org/xml/export-0.10/}page'
> doc = etree.iterparse(wiki)
>
> for _, node in doc:
> if node.tag == TAG:
> title =
> node.find("{http://www.mediawiki.org/xml/export-0.10/}title";).text
> if t
On Thu, Jul 2, 2015 at 9:57 AM, Joshua Valdez wrote:
>
> Hi so I figured out my problem, with this code and its working great but its
> still taking a very long time to process...I was wondering if there was a way
> to do this with just regular expressions instead of parsing the text with
> lxm
Hi Danny,
So I got my code workin now and it looks like this
TAG = '{http://www.mediawiki.org/xml/export-0.10/}page'
doc = etree.iterparse(wiki)
for _, node in doc:
if node.tag == TAG:
title = node.find("{http://www.mediawiki.org/xml/export-0.10/}title
").text
if title in pag
Hi Joshua,
The issue you're encountering sounds like XML namespace issues.
>> So I tried that code snippet you pointed me too and I'm not getting any
>> output.
This is probably because the tag names of the XML are being prefixed
with namespaces. This would make the original test for node.
Please use reply to all: I'm currently not in front of a keyboard at the
moment. Others on the mailing list should be able to help.
On Jun 30, 2015 6:13 PM, "Joshua Valdez" wrote:
> Hi Danny,
>
> So I tried that code snippet you pointed me too and I'm not getting any
> output.
>
> I tried playin
On 30/06/15 16:10, Joshua Valdez wrote:
So I wrote this script to go over a large wiki XML dump and pull out the
pages I want. However, every time I run it the kernel displays 'Killed' I'm
assuming this is a memory issue after reading around but I'm not sure where
the memory problem is in my scri
On Tue, Jun 30, 2015 at 8:10 AM, Joshua Valdez wrote:
> So I wrote this script to go over a large wiki XML dump and pull out the
> pages I want. However, every time I run it the kernel displays 'Killed' I'm
> assuming this is a memory issue after reading around but I'm not sure where
> the memory
On Tue, Aug 24, 2010 at 9:54 AM, Triantafyllos Gkikopoulos <
t.gkikopou...@dundee.ac.uk> wrote:
> Hi,
>
> I am looking for an alternative to:
>
>
>
> Please consider the environment. Do you really need to print this email?
>
>
>
> >>>
On Tue, Mar 17, 2009 at 6:34 AM, A.T.Hofkamp wrote:
>> http://personalpages.tds.net/~kent37/kk/00012.html
>
> Nice web-page!
Thanks!
> You can do the above statements also iteratively of course
>
> for i in ...
> s = read()
> # write s
>
> but since the loop does nothing with either s or read
Kent Johnson wrote:
On Mon, Mar 16, 2009 at 12:30 PM, A.T.Hofkamp wrote:
I don't know what code is executed in an assignment exactly, but
**possibly**, first the 'read()' is executed (thus loading a very big string
into memory), before assigning the value to the variable (which releases the
pr
On Mon, Mar 16, 2009 at 12:30 PM, A.T.Hofkamp wrote:
> I don't know what code is executed in an assignment exactly, but
> **possibly**, first the 'read()' is executed (thus loading a very big string
> into memory), before assigning the value to the variable (which releases the
> previous value of
Cheetah1000 wrote:
I can't speak for Python 2.6, but using Jython 2.1 (Python 2.1 for Java),
the code only looks at the file you are trying to extract()/read(). Near
the end of the zip archive is a directory of all the files in the archive,
with the start position and length of each file. Jytho
Alan Gauld wrote:
>
>
> "Sander Sweers" wrote
>
>> ... I would expect zf.read(zfilename) to only read the
>> requested file in the zipfile.
>
> That's a dangerous assumption. You might be right but I'd want to
> do some tests first to see. But if even one zipped file was big the
> same wou
Sander Sweers wrote:
2009/3/10 Alan Gauld :
newFile.write(zf.read(zfilename))
Remember you are reading the file into memory and then writing it
out again in a single operation, that will use twice the space of the
uncompressed files - plus some extra for overhead.
Question, Do you m
"Sander Sweers" wrote
out again in a single operation, that will use twice the space of
the
uncompressed files - plus some extra for overhead.
Question, Do you mean the file in the zipfile (zfilename) or the
whole
zipfile (zf)? I would expect zf.read(zfilename) to only read the
requested
2009/3/10 Alan Gauld :
>> newFile.write(zf.read(zfilename))
>
> Remember you are reading the file into memory and then writing it
> out again in a single operation, that will use twice the space of the
> uncompressed files - plus some extra for overhead.
Question, Do you mean the file in
"Harris, Sarah L" wrote
However I still have a memory error when I try to run it on three
or more files that are over 100 MB?
And this surprises you? :-)
How much memory do you have free on your computer when you run this?
newFile.write(zf.read(zfilename))
Remember you are re
On Tue, Mar 10, 2009 at 8:45 AM, Harris, Sarah L
wrote:
> That looks better, thank you.
> However I still have a memory error when I try to run it on three or more
> files that are over 100 MB?
How big are files in the zip file?
It seems that in this line
newFile.write(zf.read(zfilename))
the
"Harris, Sarah L" wrote
fname=filter(isfile, glob.glob('*.zip'))
for fname in fname:
This will confuse things. fname starts off as a list of files
and then becomes a single filename inside the loop.
It's never a good idea to duplicate variable names
like that. It also means that after th
On Fri, Mar 6, 2009 at 5:03 PM, Harris, Sarah L
wrote:
> fname=filter(isfile, glob.glob('*.zip'))
> for fname in fname:
> zipnames=filter(isfile, glob.glob('*.zip'))
> for zipname in zipnames:
> ...
It looks you're using an unnecessary extra loop.
Aren't the contents of fname sim
Hello,
On Sat, Mar 7, 2009 at 11:03 AM, Harris, Sarah L
wrote:
> import zipfile, glob, os
> os.chdir('E:\\test1')
> from os.path import isfile
> fname=filter(isfile, glob.glob('*.zip'))
> for fname in fname:
> zipnames=filter(isfile, glob.glob('*.zip'))
> for zipname in zipnames:
>
utomated testing is "A Good Thing" :-)
Alan G.
- Original Message -
From: "Alan Gauld" <[EMAIL PROTECTED]>
To: tutor@python.org
Date: Thu, 31 Jul 2008 06:39:32 +0100
Subject: Re: [Tutor] Memory error - how to manage large data sets?
"Kepala Pening
Kepala Pening wrote:
def sumEvenFibonacci( limit ):
a, b = 1, 1 # don't waste with a = 0
sum = 0
while b < limit:
if b%2 == 0: sum += b
a, b = b, a + b
return sum
print sumEvenFibonacci( 200 )
Every 3rd element in the Fibo
, 31 Jul 2008 06:39:32 +0100
Subject: Re: [Tutor] Memory error - how to manage large data sets?
>
> "Kepala Pening" <[EMAIL PROTECTED]> wrote
>
> > def sumEvenFibonacci( limit ):
> > a, b = 1, 1 # don't waste with a = 0
> > sum = 0
> > w
"Kepala Pening" <[EMAIL PROTECTED]> wrote
def sumEvenFibonacci( limit ):
a, b = 1, 1 # don't waste with a = 0
sum = 0
while b < limit:
if b%2 == 0: sum += b
a, b = b, a + b
return sum
print sumEvenFibonacci( 200 )
Does it work for limit = 2?
Alan G.
__
s Fuller <[EMAIL PROTECTED]>
To: tutor@python.org
Date: Mon, 28 Jul 2008 12:27:58 -0500
Subject: Re: [Tutor] Memory error - how to manage large data sets?
> On Monday 28 July 2008 10:56, Karthik wrote:
> > Hi,
> >
> >
> >
> > I am new to Python programming, I was tr
The original post was a little ambiguous: "I need to find the sum of all
numbers at even positions in the Fibonacci series upto 2 million."
But the project euler page
(http://projecteuler.net/index.php?section=problems&id=2) is clear: "Find the
sum of all the even-valued terms in the sequence
>(the solution, of course, is to avoid storing all those numbers in the
>first place)
I tried this:
fib = {0:0,1:1}
sum = 0
for j in xrange (2,100):
i = fib[j-1] + fib[j-2]
if i % 2 == 0:
sum += i
fib = {j-1:fib[j-1], j:i}
print sum
I guess it should come up with the ri
"Alan Gauld" <[EMAIL PROTECTED]> wrote
> were infinite using floats! So you need to calculate the
> total as you go without saving the values
>
I got curious so wrote the following function:
>>> def fibtot(N):
... f0,f1,tot = 0,1,1
... for n in range(N):
... f = f0 + f1
... f0,f1 =
There's no need to keep any lists. The sum can be done on the fly, which is
perhaps a bit slower, but takes a constant amount of ram. Even storing every
other element (or every third, which is what he's trying to do: the elements
that are even numbers, not every other element.. See his exampl
On 29/07/2008, Daniel Sarmiento <[EMAIL PROTECTED]> wrote:
> I tried to run your code and checked (with top) the memory ussage and
> it uses more than 2 Gb of memory.
>
> I tried to modify the code a little bit to use less memory and came up
> with this:
>
> fib = {0:0,1:1}
>
> even = []
>
>
"Karthik" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
Forgot to include the following information,
Platform - win32
Version - 2.5.1
Error message:
Traceback (most recent call last):
File "C:\Python25\programs\fibo.py", line 10, in
if i % 2 == 0:
MemoryError
OK, It does look
:08 +0530
> From: "Karthik" <[EMAIL PROTECTED]>
> Subject: Re: [Tutor] Memory error - how to manage large data sets?
> To:
> Message-ID: <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset="us-ascii"
>
> Forgot to include the following i
> 1. I need to find the sum of all numbers at even positions in the
> Fibonacci series upto 2 million.
>
> 2. I have used lists to achieve this.
I see. You may want to produce a "sequence" or "iterator" of
fibonacci numbers rather than an explicit list. As it is, your
machine does not ha
On Monday 28 July 2008 10:56, Karthik wrote:
> Hi,
>
>
>
> I am new to Python programming, I was trying to work out a few problems in
> order to grasp the knowledge gained after going through the basic chapters
> on Python programming. I got stuck with a memory error.
>
>
>
> Following is what I di
Forgot to include the following information,
Platform - win32
Version - 2.5.1
Error message:
Traceback (most recent call last):
File "C:\Python25\programs\fibo.py", line 10, in
if i % 2 == 0:
MemoryError
Code:
fib = []
even = []
def fibonacci(x,y):
return x+y
"Karthik" <[EMAIL PROTECTED]> wrote
I am new to Python programming, I was trying to work out a few
problems in
order to grasp the knowledge gained after going through the basic
chapters
on Python programming. I got stuck with a memory error.
Always show us the full error text, it contains
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