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,
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
got memory error, can you plaese help me because i have no idea how to
solve th
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
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 script and if there were any tricks to reduce
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?
>
>
>
> >>>
Hi,
I am looking for an alternative to:
Please consider the environment. Do you really need to print this email?
>>> listx=[[[] for k in range(ds)] for j in range(i)]
as right now I am getting a Memory error on this, I tried
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
day, March 09, 2009 9:02 PM
To: Harris, Sarah L
Cc: tutor@python.org
Subject: Re: [Tutor] memory error
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
"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:
>
Hello,
I am very much a beginner at programming. As a learning tool I am trying to
extract multiple zipped files. I got it to work after looking at lots of other
examples (see below for code) but because some of my files are quite large I
end up with a 'Memory Error'. Is there a simple way to fi
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
gt; ------
>
> Message: 1
> Date: Tue, 29 Jul 2008 11:48:11 +1200
> From: "John Fouhy" <[EMAIL PROTECTED]>
> Subject: Re: [Tutor] Memory error - how to manage large data sets?
> To: "Daniel Sarmien
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
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 did,
1. I need to find the sum of all numbers at even
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