date:20100908

Re: mail sending -- smtplib

2010-09-08 Thread Kurian Thayil

Got it fixed. It was a very silly mistake. mssg variable had each line with
indent. Removed the indent and it worked.

Regards,

Kurian Thayil.

On Tue, Sep 7, 2010 at 9:57 AM, Kurian Thayil kurianmtha...@gmail.comwrote:

 Hi All,

 I am a newbie in python. Just 2-3 days old wanting to learn this amazing
 programming language. I was trying to send mails using smtplib module, so
 did some google and found a code snippet. The mail gets sent, but doesn't
 come in the right format when a for-loop is introduced (Not MIME standard?).
 Without the for-loop the script works fine. Can anyone advice?
 *
 #!/usr/bin/env python

 import smtplib

 for i in range(1,5):
 print I is ,i
 fromaddr='kurianmtha...@gmail.com'
 toaddr='kurianmtha...@gmail.com'
 print toaddr
 mssg=From: Kurian Thayil kurianmtha...@gmail.com
 To: Kurian Thayil kurianmtha...@gmail.com
 MIME-Version: 1.0
 Content-type: text/html
 Subject: 12345 -- Reloaded :)

 bHey dude.. how are you/b

 brbrbrbr
 Regards,
 brbr
 Kurian
 
 print message is ,mssg

 smail=smtplib.SMTP('smtp.gmail.com',587)

 smail.ehlo()
 smail.starttls()
 smail.ehlo()
 smail.login(fromaddr,'***')

 smail.sendmail(fromaddr,toaddr,mssg)
 print Over
 *

 Regards,

 Kurian Thayil.

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Re: The Samurai Principle

2010-09-08 Thread Ian Kelly

On Tue, Sep 7, 2010 at 9:35 PM, Phlip phlip2...@gmail.com wrote:
 Exceptions are very dangerous by themselves, because if you don't trap
 them just right they can cause side-effects.

And returning None on failure is dangerous, because if the programmer
does not take care to handle that case, the program may attempt to
regard it as actual data.  This in turn results in hard-to-track bugs
elsewhere in the program, a fate much worse than an unhandled
exception.  It's better to fail noisily than to fail silently.

 They are worse than GOTO.

This assertion is questionable at best.  Exceptions are structured;
goto is unstructured, giving you much more rope to hang yourself with.
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Re: another way to sort like l.sort(key=lambda x:(x[0][0], -x[1][0]))

2010-09-08 Thread sajuptpm

Detailed Description
-


l1 = []

l2 = [
 ((3,8),(1,2)),
 ((1,3),(1,7)),
 ((7,0),(1,8)),
 ((4,2),(1,2)),
 ((2,9),(9,1))
]

I need to take each item from l2 and insert into l1 with first
element(column)(3,1,7,4,2) sorted in ascending order and second
element(column)(8,3,0,2,9) sorted in descending order.


#SORTING

for k in l2:
flag=True
for i, v in enumerate(l1):
if v = k:
l1.insert(i,k)
flag = False
break
if flag:
l1.append(k)


for a in l1:
print a

output
---
((7, 0), (1, 8))
((4, 2), (1, 2))
((3, 8), (1, 2))
((2, 9), (9, 1))
((1, 3), (1, 7))

This will not give l1 with first element(column)(3,1,7,4,2) sorted in
ascending order and second element(column)(8,3,0,2,9) sorted in
descending order.

-- I added a -ve signe to all first elements

l2 = [
 ((-3,8),(1,2)),
 ((-1,3),(1,7)),
 ((-7,0),(1,8)),
 ((-4,2),(1,2)),
 ((-2,9),(9,1))
]

#SORTING

for k in l2:
flag=True
for i, v in enumerate(l1):
if v = k:
l1.insert(i,k)
flag = False
break
if flag:
l1.append(k)


for a in l1:
print a

output
---
((-1, 3), (1, 7))
((-2, 9), (9, 1))
((-3, 8), (1, 2))
((-4, 2), (1, 2))
((-7, 0), (1, 8))

Now output is similar to first elements asc and second elements
desc.But the problem is the -ve sign, i dont need that.

Have any other method to do it??
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Re: list of tuples with dynamic change in position

2010-09-08 Thread Ulrich Eckhardt

sajuptpm wrote:
 i want to find the loaded machine based on cpu and mem and desk
 utilization by changing this order.
 
 I created a UI using that i can change the order of item in the tuple.
 But the problem is asc and desc sorting

How about only changing the order in which the elements are displayed? In
other words, the internal data is fixed, but both the sorting of the list
and the order in which the parts of the records are displayed can be
changed.

Just my 2c

Uli


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Geschäftsführer: Thorsten Föcking, Amtsgericht Hamburg HR B62 932

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LZO decompressing with Python 2.5x on Windows for C dummies

2010-09-08 Thread Kim Hansen

Hi list,

I have some binary data files which contain embedded LZO compressed
payloads mixed with normal C-struct like headers.

I would like to have the ability to LZO decompress these payloads using a
python 2.5.x script.

I was hoping that there was an up-to-date plug-and-play LZO library
available for Windows somewhere. However, I have not managed to find such a
one.

The closest I have gotten is on the official LZO home page:

http://www.oberhumer.com/opensource/lzo/

There is a link to some old LZO 1.08 bindings for Python 2.2 there as a
tar.gz (released back in 2002!)

http://www.oberhumer.com/opensource/lzo/download/LZO-v1/python-lzo-1.08.tar.gz

I managed to unpack that using the python tarfile module (very handy for the
purpose)

In essence, the tarball contains a
setup.py
lzomodule.c
Makefile
and some documentation

It does not contain anything that appears to be binaries for Windows. The
instructions indicate that I am supposed to build it myself using the
Makefile. I do not have make nor a C-compiler installed, and I fear that if
I were to compile it, it would be a very tedious process for me, and I would
rather like to avoid it if at all possible.

Concerning the Windows LZO binaries I have previously struggled with
pytables and using LZO on Windows with HDF5 files, and in relation to that
Francesc Alted was so kind to build Windows LZO ver. 1.08 binaries as
discussed here

http://www.pytables.org/moin/FAQ#A.5BWindows.5DCan.27tfindLZObinariesforWindows

and available here as a zip file

http://www.pytables.org/download/lzo-win

Amongst others, this zip file has a

Gwin32\bin\lzo1.dll

file. By copying that to the ptables filder in my python25 installation I
have managed to get LZO working with pytables.

Getting back to the python bindings, the setup.py does contain a section,
which indicates that it adresses a Windows platform also:

...
if sys.platform == win32:
# Windows users have to configure the LZO_DIR path parameter to match
# their LZO source installation.  The path set here is just an example
# and thus unlikely to match your installation.
LZO_DIR = rc:\src\lzo-1.08
include_dirs.append(os.path.join(CURL_DIR, include))
extra_objects.append(os.path.join(CURL_DIR, lzo.lib))
...

If I were clever enough I now guess I should be able to unpack the pytables
lzo Windows binaries to some suitable place (any recommendations?) and
modify the setup.py such that it
correctly binds the dll (this is black magic to me). One thing, which
concerns me, is that a file lzo.lib is mentioned in the current setup.py,
but there is not a file with that name in the GnuWin32 zip zip file from
Francesc in the lib folder of the zip I do find two lib files.:

liblzo.lib
liblzo-bcc.lib

but are any of these related to the lzo.lib mentioned in the setup.py?

It does not help that I have a very poor understanding of how Python binds
to native libraries, nor how things should be installed manually.

My next question, if somehow someone is able to guide me a little in the
process, then how do I use the library once available.

The README indicates that I should use the internal Python documentation- So
I guess i should just open an IPython shell do an

import lzo?
and then tab on lzo. and see what is available?

Sorry for the long post.

Kind regards,
Kim
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Re: The Samurai Principle

2010-09-08 Thread Ian Kelly

On Tue, Sep 7, 2010 at 9:38 PM, Phlip phlip2...@gmail.com wrote:
 Everyone gets defensive about the design flaws in their own language.
 But the django.db situation is not even a design flaw; just a
 misinterpretation of the Samurai Principle. int('yo') shall throw an
 exception, but a missing record could be the result you were looking
 for, so it's not exceptional.

I consider it exceptional because it breaks the rule that
Model.objects.get(...) returns an instance of Model.  If it can also
return None, then this needs to be checked for every time the method
is called, because None does not implement the Model interface and
will break if you try to use it like that.  You're still doing
exception handling; you're just doing it with an if instead of a
try-except.  I prefer to do exception handling in a block clearly
marked as an exception handler.

Out of curiosity, would you also regard the case where two matching
records are found instead of one as not exceptional?  After all, it
could be the result you were looking for.  What should QuerySet.get
return in that case, if it doesn't raise an exception?
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Re: include a file in a python program

2010-09-08 Thread bussiere bussiere

Thanks all for your response i will try out this week, you have give
me sufficient hints.
Thanks again.
Bussiere
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Re: another way to sort like l.sort(key=lambda x:(x[0][0], -x[1][0]))

2010-09-08 Thread Peter Otten

sajuptpm wrote:

 Now output is similar to first elements asc and second elements
 desc.But the problem is the -ve sign, i dont need that.
 
 Have any other method to do it??

Sort twice:

 for item in items:
... print item
...
('adams', 'anne')
('miller', 'arnold')
('miller', 'bill')
('adams', 'berta')
('adams', 'charlotte')
('miller', 'thomas')
 items.sort(key=lambda x: x[1], reverse=True)
 items.sort(key=lambda x: x[0])
 for item in items:
... print item
...
('adams', 'charlotte')
('adams', 'berta')
('adams', 'anne')
('miller', 'thomas')
('miller', 'bill')
('miller', 'arnold')

See? First column ascending, second column descending within groups of rows 
with equal first column.

Peter
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console-editor written in python

2010-09-08 Thread Tanje Toolate

hi there,


greetings.

i am looking for a small, console-based (opensource) texteditor,
written in python (or as shellscript!), but i'm not finding something
usable.

very find would be emacs-keybindings ...


dank u well,


tanja
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Re: mutate dictionary or list

2010-09-08 Thread Baba

On 7 sep, 16:46, Ben Finney ben+pyt...@benfinney.id.au wrote:
 de...@web.de writes:
  Objects can be mutable or immutable. For example, in Python, integers,
  strings, floats and tuples are immutable. That means that you can't
  change their value.

 Yes. Importantly, wherever you see code that you *think* is changing the
 value of an immutable object, you're thinking incorrectly. (There's no
 shame in that; other languages give us preconceptions that can be hard
 to shake off.)

 The only way to get a different value from an integer object is to ask
 Python for a different integer object; the original is unchanged. The
 same goes for tuples, strings, and all the other immutable types.

  Mutable objects OTOH can be changed.

 […]

 Some good articles to explain Python's object model:

      URL:http://effbot.org/zone/python-objects.htm
      
 URL:http://docs.python.org/reference/datamodel.html#objects-values-and-types

 --
  \             “We can't depend for the long run on distinguishing one |
   `\         bitstream from another in order to figure out which rules |
 _o__)               apply.” —Eben Moglen, _Anarchism Triumphant_, 1999 |
 Ben Finney

Thanks all for feedback!
Baba
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Re: accessing a text file

2010-09-08 Thread Baba

On 8 sep, 02:07, Ben Finney ben+pyt...@benfinney.id.au wrote:
Baba raoul...@gmail.com writes:
However the following Wiki excerpt seems to go in my direction:

No, it doesn't. It advises that people show kindness; as I've been
arguing, that's exactly what you were shown. You haven't shown how the
information being imparted could have been fully imparted in a way
that's kinder, nor that it would be reasonable to do so.

To put it another way: if you feel offended by an utterance, then
insufficient kindness on the part of the speaker is not the only
explanation.

--
\ “Software patents provide one more means of controlling access |
`\ to information. They are the tool of choice for the internet |
_o__) highwayman.” —Anthony Taylor |
Ben Finney

Hi Ben,

Thanks for your feedback. My question is: Who owns this forum? If we
all do then we are allowed to post questions that are simple and that
could otherwise be answered by doing research. It is just unfriendly
to tell someone to go and look it up by themselves. Who is licensed to
judge what can and cannot be posted as a question? A teacher of mine
used to say: There are no stupid questions, there are only stupid
answers. It is arrogant to tell someone in a Forum to look it up
yourself ,this question is too basic. Can you not understand that
accessing a file can seem daunting at first? Believe me, documentation
can be offputting too when you only start with programming. Per se the
beauty of forums like these is that there are human beings willing to
make such tasks as finding out how to access a text file less 'scary'.
Whoever thinks he or she has a license to tell someone to look up the
answer by themselves should think again. I reckon the only license we
have is not to answer at all. I acknowledge that Benjamin pointed me
to the right place to find an answer but somehow the Please do us a
favour sounded bit arrogant, as if he owned the place (same goes for
all those who sided against me here: do you own this forum?)...i'd be
glad if there was a python for beginners forum but in the meantime i
have to say i find it awesome to have this forum to get help. It makes
a BIG difference. So sorry if i upset anyone, we all have our opinions
and get carried away and can be stubborn, i DO respect everyone in
this forum and i think it goes bothways. I've learned a few things in
this post...

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