date:20120524

Fayaz Yusuf Khan wrote:

 ***TRIVIAL ISSUE***, but this has been irking me for a while now.
 The main logging.Handler class' __init__ accepts a level argument while
 none of its children do. The poor minions seem to be stuck with the
 setLevel method which considerably lengthens the code.
 
 In short:
 Let's do this:
 root.addHandler(FileHandler('debug.log', level=DEBUG)
 Instead of this:
 debug_file_handler = FileHandler('debug.log')
 debug_file_handler.setLevel(DEBUG)
 root.addHandler(debug_file_handler)
 
 Python 2.7

Your suggestion comes too late for Python 2 for which only bugfixes are 
accepted. For Python 3.3 you could write a patch and make a feature request 
on http://bugs.python.org/ .

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Working with dates : complex problem

2012-05-24 Thread Thibaut DIRLIK

Hi,

I've a list of python objects with dates attributes. This list is ordered
by one of these date. Elements mandatory follow each other :

Element #1   Element #2   Element #3
|-|--|--|

Now, I want to insert an element in this timeline. This imply that I will
have to resize some elements :

Element #1   Element #2   Element #3
|-|--|--|
New element
  |--|

And after resize :

Element #1  New element   Element #2   Element #3
|-|--|-|--|

  |--|

My question is the following : how can I know (easily) which elements my
New element is over, which,
in my example would have returned ['Element #1', 'Element #2'].

Elements objets are simple Python objects with dates :

obj.begin = datetime()
obj.end = datetime()

I'm looking for the more Pythonic way to handle this problem, thanks !
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Namespace hack

From the Zen of Python (import this):

Namespaces are one honking great idea -- let's do more of those!


Inspired by this, I have a decorator that abuses function closures to 
create a namespace type with the following properties:

- all methods are static methods that do not take a self parameter;

- methods can see class variables;

- external callers can see selected methods and attributes.


An example may make this clearer.

In a regular class:

class C:
x = 42
def spam(self, y):
return self.x + y
def ham(self, z):
return self.spam(z+1)


Notice that the class attribute x is visible to the outside caller, but 
methods spam and ham cannot see it except by prefixing it with a 
reference to self.

Here's an example using my namespace hack example:

@namespace
def C():  # Abuse nested functions to make this work.
x = 42
def spam(y):
return x + y
def ham(z):
return spam(z+1)
return (spam, ham)  # Need an explicit return to make methods visible.

However, class attribute x is not exposed. You may consider this a 
feature, rather than a bug. To expose a class attribute, define it in the 
outer function argument list:

@namespace
def C(x=42):
def spam(y):
return x + y
def ham(z):
return spam(z+1)
return (spam, ham)



And in use:

 C.x
42
 C.spam(100)
142
 C.ham(999)
1042



Here's the namespace decorator:

import inspect

def namespace(func):
spec = inspect.getargspec(func)
ns = {'__doc__': func.__doc__}
for name, value in zip(spec.args, spec.defaults or ()):
ns[name] = value
function = type(lambda: None)
exported = func() or ()
try:
len(exported)
except TypeError:
exported = (exported,)
for obj in exported:
if isinstance(obj, function):
ns[obj.__name__] = staticmethod(obj)
else:
raise TypeError('bad export')
Namespace = type(func.__name__, (), ns)
return Namespace()


Have fun!


-- 
Steven
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Re: Working with dates : complex problem

Thibaut DIRLIK wrote:

 Hi,
 
 I've a list of python objects with dates attributes. This list is ordered
 by one of these date. Elements mandatory follow each other :
 
 Element #1   Element #2   Element #3
 |-|--|--|
 
 Now, I want to insert an element in this timeline. This imply that I
 will have to resize some elements :
 
 Element #1   Element #2   Element #3
 |-|--|--|
 New element
   |--|
 
 And after resize :
 
 Element #1  New element   Element #2   Element #3
 |-|--|-|--|
 
   |--|
 
 My question is the following : how can I know (easily) which elements my
 New element is over, which,
 in my example would have returned ['Element #1', 'Element #2'].
 
 Elements objets are simple Python objects with dates :
 
 obj.begin = datetime()
 obj.end = datetime()
 
 I'm looking for the more Pythonic way to handle this problem, thanks !

Untested:

def insert(timeline, interval):
keys = [item.begin for item in timeline]
where = bisect.bisect(keys, interval.begin)
if where  0:
# adjust previous interval to avoid a gap or an intersection
timeline[where-1].end = interval.begin

# remove intervals covered by the new interval
while where  len(timeline) and timeline[where].end  interval.end:
del timeline[where]

if where  len(timeline):
# adjust subsequent interval to avoid gap or intersection
timeline[where].begin = interval.end

timeline.insert(where, interval)

If you implement comparison for your interval type you won't need the 
intermediate keys list. The functools.total_ordering decorator may help you 
with that.

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Re: Korean fonts on Python 2.6 (MacOsX)

2012-05-24 Thread Ulrich Eckhardt

Am 23.05.2012 11:30, schrieb 20_feet_tall:
 I have a problem with the visualization of korean fonts on Python.
 When I try to type in the characters only squares come out.
 I have tried to install the CJK codec, the hangul 1.0 codec but still
 no result.

What exactly do you mean with visualization? Python itself doesn't do
any visualization, all it does is to manage data. This data can be bytes
exchanged with e.g. a terminal window or a file. If the file uses
encoding A for some text, but Python interprets the bytes according to
encoding B, no good will come of it. Similarly, if the console window
expects Python to output one encoding and Python uses a different
encoding, bad things happen.

Further, but that now has almost nothing to do with Python directly, if
the console window tries to render a character that is not contained in
the current font, it will fail. The typical behaviour then is to fall
back to some placeholder char, like the square you describe.

Summary: It's not clear enough what you did, so it's impossible to tell
what went wrong. It could also help if you told us what you wanted to
achieve. That said, Python 2.7 has been out for a while, and I'd
consider upgrading.

Uli
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Re: Wish: Allow all log Handlers to accept the level argument

2012-05-24 Thread Jean-Michel Pichavant


Fayaz Yusuf Khan wrote:

Jean-Michel Pichavant wrote:
  

Meanwhile you can shorten the code this way:

root.addHandler(FileHandler('debug.log'))
root.handlers[-1].setLevel(DEBUG)



Eh? Readability was the aim.
  
I fail to see how it's not readable, code is short and no magic is 
involved provided you know about slicing list items. Anyway, to answer 
your question on why addHandler do not return the handler, I'll quote 
Dave Angel from a recent thread about why s.append(5) does not return s:


It's simpler than that.  Methods/functions either modify the object (or
one of their arguments), or return the results, but generally not both. 
So sorted() returns a sorted list without modifying the input.  And the

sort() method modifies the list, but does not return it.  So you're
right that methods on non-mutables must return the new value, since they
can't modify the object.

JM
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Re: Wish: Allow all log Handlers to accept the level argument

Jean-Michel Pichavant wrote:

 Fayaz Yusuf Khan wrote:
 Jean-Michel Pichavant wrote:
   
 Meanwhile you can shorten the code this way:

 root.addHandler(FileHandler('debug.log'))
 root.handlers[-1].setLevel(DEBUG)

 
 Eh? Readability was the aim.
   
 I fail to see how it's not readable, code is short and no magic is
 involved provided you know about slicing list items. Anyway, to answer

You have to know or verify that .addHandler() appends to the .handlers list, 
you have to check if or under which conditions

h = SomeHandler()
root.addHandler(h)
assert h is root.handlers[-1]

can fail. In short, if I see such a hack my trust in the author of that code 
is significantly lowered.

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Re: Wish: Allow all log Handlers to accept the level argument

2012-05-24 Thread Jean-Michel Pichavant


Peter Otten wrote:

Jean-Michel Pichavant wrote:

  

Fayaz Yusuf Khan wrote:


Jean-Michel Pichavant wrote:
  
  

Meanwhile you can shorten the code this way:

root.addHandler(FileHandler('debug.log'))
root.handlers[-1].setLevel(DEBUG)




Eh? Readability was the aim.
  
  

I fail to see how it's not readable, code is short and no magic is
involved provided you know about slicing list items. Anyway, to answer



You have to know or verify that .addHandler() appends to the .handlers list, 
you have to check if or under which conditions


h = SomeHandler()
root.addHandler(h)
assert h is root.handlers[-1]

can fail. In short, if I see such a hack my trust in the author of that code 
is significantly lowered.


  
I now fail to see how it's a hack. handlers is a public attribute of 
loggers.


FYI

   def addHandler(self, hdlr):
   
   Add the specified handler to this logger.
   
   if not (hdlr in self.handlers):
   self.handlers.append(hdlr)

Cheers,

JM
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Re: Wish: Allow all log Handlers to accept the level argument

Jean-Michel Pichavant wrote:

 Peter Otten wrote:
 Jean-Michel Pichavant wrote:

   
 Fayaz Yusuf Khan wrote:
 
 Jean-Michel Pichavant wrote:
   
   
 Meanwhile you can shorten the code this way:

 root.addHandler(FileHandler('debug.log'))
 root.handlers[-1].setLevel(DEBUG)

 
 
 Eh? Readability was the aim.
   
   
 I fail to see how it's not readable, code is short and no magic is
 involved provided you know about slicing list items. Anyway, to answer
 

 You have to know or verify that .addHandler() appends to the .handlers
 list, you have to check if or under which conditions

 h = SomeHandler()
 root.addHandler(h)
 assert h is root.handlers[-1]

 can fail. In short, if I see such a hack my trust in the author of that
 code is significantly lowered.

   
 I now fail to see how it's a hack. handlers is a public attribute of
 loggers.

Can you come up with a setup that makes the above assertion fail? I can 
think of three: 

- adding a handler twice
- adding a singleton handler
- adding handlers from multiple threads

 FYI
 
 def addHandler(self, hdlr):
 
 Add the specified handler to this logger.
 

Subject to change. I think in current Python

 if not (hdlr in self.handlers):
 self.handlers.append(hdlr)

is protected by a lock.

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other languages API to python

2012-05-24 Thread Rita

Hello,

A vendor provided a C, C++ and Java API for a application. They dont
support python so I would like to create a library for it. My question is,
how hard/easy would it be to create something like this? Is there a simple
HOWTO or examples I can follow? Can someone shed home light on this?

TIA

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Re: problem loading matlab data with ompc and python

2012-05-24 Thread Tim Williams

On May 23, 5:10 pm, no1 no1.w...@gmail.com wrote:
 Hi, we're investigating transitioning our company from matlab to python. We 
 found OMPC as a MATLAB m-file-to Python translator, but we're encountering a 
 problem using the translated code to import MATLAB data structures into 
 Python. For example, when we save data within MATLAB this way:

 x.a = 5;
 x.b = 6;
 save -v6 test x

 this saves data in test.mat, with MATLAB version 6 compatibility (OMPC says 
 it's not compatible with the latest versions of MATLAB). The code to read in 
 data in MATLAB is just

 load test

 and when we run it through OMPC we get

 load(mstring('test.mat'))

 but when we run it we get the error message

 File ompclib\ompclib_numpy.py, line 1496, in load
 KeyError: [('a', '|O4'), ('b', '|O4')]

 Reading in simpler data (up to arrays) does not have this problem.

 To get other people in the company to transition, we were hoping that the 
 translation process could be done in one step or on the fly. We could read in 
 MATLAB data using I/O functions imported from scipy, but then the transition 
 isn't seamless any more.

 Is there a simple fix to using OMPC? Or a similar alternative that would work 
 better?

 Thanks

Have you tried using loadmat from the scipy.io module?

http://docs.scipy.org/doc/scipy/reference/io.html
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Re: other languages API to python

On Thu, May 24, 2012 at 9:58 PM, Rita rmorgan...@gmail.com wrote:
 Hello,

 A vendor provided a C, C++ and Java API for a application. They dont support
 python so I would like to create a library for it. My question is, how
 hard/easy would it be to create something like this? Is there a simple HOWTO
 or examples I can follow? Can someone shed home light on this?

The best way would be to write something in C that exposes the API to
Python. Check out the docs on Extending and Embedding Python:

For Python 2.x: http://docs.python.org/extending/
For Python 3.x: http://docs.python.org/py3k/extending/

You'll need to learn Python's own API, of course, but if you're a
competent C programmer, you should find it fairly straightforward.

There's an alternative, too, though I haven't personally used it. The
ctypes module allows you to directly call a variety of C-provided
functions.

http://docs.python.org/library/ctypes.html
http://docs.python.org/py3k/library/ctypes.html

The resulting code isn't nearly as Pythonic as it could be if you
write a proper wrapper, but you save the work of writing C code.

Chris Angelico
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Email Id Verification

2012-05-24 Thread niks

Hello everyone..
I am new to asp.net...
I want to use Regular Expression validator in Email id verification..
Can anyone tell me how to use this and what is the meaning of
this
\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
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Re: Email Id Verification

On Thu, May 24, 2012 at 10:32 PM, niks nikunjparmar...@gmail.com wrote:
 Hello everyone..
 I am new to asp.net...
 I want to use Regular Expression validator in Email id verification..
 Can anyone tell me how to use this and what is the meaning of
 this
 \w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*

This is a mailing list about Python, not ASP, and not regular
expressions. Every regex library is different, some more than others,
so your best bet is to find documentation on the actual
function/library you'll be using.

But I would strongly recommend NOT using a regex to validate an email
address. It's prone to false positives and false negatives. There are,
unfortunately, many systems around which do not accept legal addresses
(for instance, this.is.vali...@rosuav.com is, as the name suggests,
quite valid - as is fred_foobar@[203.214.67.43]); part of the blame
can be laid on PHP's inbuilt validation functions, but I know that
several are implemented using a fairly simple and brutally wrong
check.

Validate the domain part (the bit after the @) with a DNS lookup,
nothing more and nothing less. If you absolutely must do a
syntactic/charset check, read the appropriate RFCs and figure out what
really is and isn't legal. You will be surprised. (For instance,
foo@localhost is a perfectly valid address, because localhost is a
top-level domain.)

Chris Angelico
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Re: Python Book for a C Programmer?

2012-05-24 Thread William R. Wing (Bill Wing)

On May 23, 2012, at 7:45 PM, hsa...@gmail.com wrote:

 I am trying to join an online class that uses python. I need to brush up on 
 the language quickly. Is there a good book or resource that covers it well 
 but does not have to explain what an if..then..else statement is?
 
 Thanks.
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My preference is Python Essential Reference by Beazley.  You can find it and 
several reviews here:


http://www.amazon.com/Python-Essential-Reference-David-Beazley/dp/0672329786/ref=sr_1_1?s=booksie=UTF8qid=1337859988sr=1-1

-Bill
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Re: Email Id Verification

2012-05-24 Thread alister

On Thu, 24 May 2012 05:32:16 -0700, niks wrote:

 Hello everyone..
 I am new to asp.net...
 I want to use Regular Expression validator in Email id verification..
 Can anyone tell me how to use this and what is the meaning of this
 \w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*

this is not really a python question.

I would suggest you locate a good regular expression tutorial  then try 
to break it down
otherwise you could try asking in an asp.net forum




-- 
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regular expressions Now you have two problems.
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Re: Python Book for a C Programmer?

2012-05-24 Thread alister

On Wed, 23 May 2012 16:45:05 -0700, hsaziz wrote:

 I am trying to join an online class that uses python. I need to brush up
 on the language quickly. Is there a good book or resource that covers it
 well but does not have to explain what an if..then..else statement is?
 
 Thanks.

Dive into python seems to be quite popular  can be read online fro free



-- 
If life gives you lemons, make lemonade.
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Re: Namespace hack

2012-05-24 Thread Daniel Fetchinson

 From the Zen of Python (import this):

 Namespaces are one honking great idea -- let's do more of those!


 Inspired by this, I have a decorator that abuses function closures to
 create a namespace type with the following properties:

 - all methods are static methods that do not take a self parameter;

 - methods can see class variables;

 - external callers can see selected methods and attributes.


 An example may make this clearer.

 In a regular class:

 class C:
 x = 42
 def spam(self, y):
 return self.x + y
 def ham(self, z):
 return self.spam(z+1)


 Notice that the class attribute x is visible to the outside caller, but
 methods spam and ham cannot see it except by prefixing it with a
 reference to self.

 Here's an example using my namespace hack example:

 @namespace
 def C():  # Abuse nested functions to make this work.
 x = 42
 def spam(y):
 return x + y
 def ham(z):
 return spam(z+1)
 return (spam, ham)  # Need an explicit return to make methods visible.

 However, class attribute x is not exposed. You may consider this a
 feature, rather than a bug. To expose a class attribute, define it in the
 outer function argument list:

 @namespace
 def C(x=42):
 def spam(y):
 return x + y
 def ham(z):
 return spam(z+1)
 return (spam, ham)



 And in use:

 C.x
 42
 C.spam(100)
 142
 C.ham(999)
 1042



 Here's the namespace decorator:

 import inspect

 def namespace(func):
   spec = inspect.getargspec(func)
   ns = {'__doc__': func.__doc__}
   for name, value in zip(spec.args, spec.defaults or ()):
   ns[name] = value
   function = type(lambda: None)
   exported = func() or ()
   try:
   len(exported)
   except TypeError:
   exported = (exported,)
   for obj in exported:
   if isinstance(obj, function):
   ns[obj.__name__] = staticmethod(obj)
   else:
   raise TypeError('bad export')
   Namespace = type(func.__name__, (), ns)
   return Namespace()


 Have fun!

Funny, you got to the last line of import this but apparently
skipped the second line:

Explicit is better than implicit.

And you didn't even post your message on April 1 so no, I can't laugh
even though I'd like to.

Cheers,
Daniel


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Re: Python Book for a C Programmer?

2012-05-24 Thread Javier Novoa C.

On 2012-05-24, alister alister.w...@ntlworld.com wrote:
 On Wed, 23 May 2012 16:45:05 -0700, hsaziz wrote:

 I am trying to join an online class that uses python. I need to brush up
 on the language quickly. Is there a good book or resource that covers it
 well but does not have to explain what an if..then..else statement is?
 
 Thanks.

 Dive into python seems to be quite popular  can be read online fro free



Learning Python by Mark Lutz, from O'Reilly is a good one, I've been
reading it and it also enforces a comparison between C programming and
Python. However, it's focused on Python 2, but it also mentions Python
3 things in the text...


-- 
Javier Novoa C.

--- Posted via news://freenews.netfront.net/ - Complaints to n...@netfront.net 
---
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Re: Python Book for a C Programmer?

2012-05-24 Thread boB Stepp

On Thu, May 24, 2012 at 8:28 AM, Javier Novoa C.
jsti...@invernalia.homelinux.net wrote:
 On 2012-05-24, alister alister.w...@ntlworld.com wrote:
 On Wed, 23 May 2012 16:45:05 -0700, hsaziz wrote:

 I am trying to join an online class that uses python. I need to brush up
 on the language quickly. Is there a good book or resource that covers it
 well but does not have to explain what an if..then..else statement is?

 Thanks.

 Dive into python seems to be quite popular  can be read online fro free



 Learning Python by Mark Lutz, from O'Reilly is a good one, I've been
 reading it and it also enforces a comparison between C programming and
 Python. However, it's focused on Python 2, but it also mentions Python
 3 things in the text...


There is a new edition out, copyright 2010 if I recall correctly, that
updates its coverage to Python 3.x, which is the book's primary focus,
though it points out where 3.x syntax does not work in version 2.x.

Cheers!
boB
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Dynamic comparison operators

2012-05-24 Thread mlangenhoven

I would like to pass something like this into a function
test(val1,val2,'=')

and it should come back with True or False.

Is there a way to dynamically compare 2 values like this or will I have to code 
each operator individually?
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Re: Dynamic comparison operators

2012-05-24 Thread Phil Le Bienheureux

Hello,

You can pass an operator as an argument to your function.

See :
http://docs.python.org/library/operator.html

Regards,


-- Forwarded message --
From: mlangenho...@gmail.com
Date: 2012/5/24
Subject: Dynamic comparison operators
To: python-list@python.org


I would like to pass something like this into a function
test(val1,val2,'=')

and it should come back with True or False.

Is there a way to dynamically compare 2 values like this or will I have to
code each operator individually?
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Re: Dynamic comparison operators

2012-05-24 Thread Alain Ketterlin

mlangenho...@gmail.com writes:

 I would like to pass something like this into a function
 test(val1,val2,'=')

 and it should come back with True or False.

def test(x,y,c):
return c(x,y)

Call with: test(v1,v2, lambda x,y:x=y ). A bit noisy imho.

If you have a finite number of comparison operators, put them in a dict:

compares = dict([ (,lambda x,y:xy),
  (|,lambda x,y: x.startswith(y)),
  ... ])

and use them like: test(v1,v2,compares[=]), or simply:
compares[=](v1,v2)

-- Alain.
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Re: Dynamic comparison operators

2012-05-24 Thread Tim Chase

On 05/24/12 09:32, Phil Le Bienheureux wrote:
 I would like to pass something like this into a function
 test(val1,val2,'=')

 You can pass an operator as an argument to your function.
 
 See :
 http://docs.python.org/library/operator.html

And if you want to use strings, you can map them to the functions:

  import operator as o
  OPERATOR_MAP = {
'=': o.eq,
'==': o.eq,
'!=': o.ne,
'=': o.ge,
# ...
}

  def test(v1, v2, op):
return OPERATOR_MAP[op](v1, v2)

-tkc



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Re: Dynamic comparison operators

2012-05-24 Thread Jussi Piitulainen

Alain Ketterlin writes:
 mlangenho...@gmail.com writes:
 
  I would like to pass something like this into a function
  test(val1,val2,'=')
 
  and it should come back with True or False.
 
 def test(x,y,c):
 return c(x,y)
 
 Call with: test(v1,v2, lambda x,y:x=y ). A bit noisy imho.

Re noisy:

import operator as o

test(v1, v2, o.le)
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Re: Email Id Verification

On Thu, May 24, 2012 at 11:45 PM, Dennis Lee Bieber
wlfr...@ix.netcom.com wrote:
        And maybe follow-up with a review of this monster:
 http://www.ex-parrot.com/pdw/Mail-RFC822-Address.html

That is awesome. Epic. Eyeball-bleeding.

ChrisA
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Re: Dynamic comparison operators

2012-05-24 Thread Colin J. Williams


On 24/05/2012 10:14 AM, mlangenho...@gmail.com wrote:

I would like to pass something like this into a function
test(val1,val2,'=')

and it should come back with True or False.

Is there a way to dynamically compare 2 values like this or will I have to code 
each operator individually?


Would something like the following meet your need?

Yes, it would be nice if there were a b.__name__ constant.

Colin W.
'''
I would like to pass something like this into a function
test(val1,val2,'=')

and it should come back with True or False.

Is there a way to dynamically compare 2 values like this or will I have 
to code each operator individually?

'''
def test(text):
return eval(text)

a= 25
b= 50

print test('a == b')
print test('a != b')
print test('a = b')



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Czy dysponujesz dwoma wolnymi godzinami w tygodniu? Oto jak zarobc 185 EUR w tym czasie.

2012-05-24 Thread python-list

Dzien dobry!

Dziekujemy bardzo za zainteresowanie pozycja regionalnego przedstawiciela dostepna obecnie w Polsce i krajach Europy Srodkowej.

Chcialem by przedstawic, bardzo krotko - nasza wybitna firme.
W.U.G. Inc zostala zalozona w 1992 roku i obecnie stala sie jedna z najbardziej
uznawanych firm biznesowych, ktore zapewniaja kompleksowa obsluge swoim
klientom.
Siec przedstawicielstw West Union Group jest reprezentowana w ponad 32 krajach
i swiadczy uslugi do 46 krajow.
Specjalizujemy sie w doradztwie w zakresie planowania podatkowego, rejestracji
firm, nadajac rowniez dodatkowe finansowe uslugi wsparcia dla firm
zagranicznych.
WUG jest dobrze znana w USA, Kanadzie i niektorych panstwach Unii Europejskiej.

Nasza firma nie moze pozwolic na stworzenie regionalnego biura w kazdym kraju z
powodu wysokich kosztow operacyjnych, z tego powodu pragniemy wynajac
przedstawiciela regionalnego wypelniac powierzone mu zadania.
Wiekszosc naszych operacji z klientami sa przeprowadzane w Internecie.

Kiedy klient jest gotowy oplacic za korzystanie z naszych uslug, regionalny
przedstawiciel bedzie musial pomoc mu / jej przetworzyc platnosci i upewnic
sie, ze fundusze zostaly otrzymane w naleznym czasie.

Regionalny Przedstawiciel bedzie odpowiedzialny za pomoc naszym klientom z
niektorymi ugodami i przetwarzanie przelewow.

Gwarantujemy wynagrodzenie w wysokosci 2500 EUR miesiecznie wyplacane co dwa
tygodnie.

Nalezy pamietac, ze duza czesc zadan zostanie przedstawiona w ciagu dziennego
czasu.
Zwroccie uwage, ze proponujemu pozycje o niepelnym wymiarze godzin, wiec trzeba
bedzie wydac tylko 2-3 godzin dziennie na tej prace.

WUG Inc zabezpieczy nowego pretendenta w calosci oplacalnym dwutygodniowym
treningowym okresem.
Otrzymaja Panstwo wszystkie niezbedne informacje na temat szkolen od naszego
specjalisty po zatrudnieniu.

Jesli znajdujecie to interesujacym, zyczliwie prosimy was podac nam wasze dane
kontaktowe (naprzyklad numer telefonu, imie i nazwisko), abysmy mogli
skontaktowac sie z wami dla dalszej komunikacji.
Prosimy nie wahajcie sie z nami skontaktowac w kazdej chwili, jesli macie
jakiekolwiek dodatkowe pytania dotyczace tej pozycji.

Nasz e-mail: maksymil...@toppolandjobs.com,Najcieplej pozdrawiamy,

Maksymilian Skrzypinski
Menadzer personelu
WUG Inc
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Re: Python Book for a C Programmer?

2012-05-24 Thread Javier Novoa C.

On Thu, May 24, 2012 at 08:34:24AM -0500, boB Stepp wrote:
 On Thu, May 24, 2012 at 8:28 AM, Javier Novoa C.
 jsti...@invernalia.homelinux.net wrote:
  On 2012-05-24, alister alister.w...@ntlworld.com wrote:
  On Wed, 23 May 2012 16:45:05 -0700, hsaziz wrote:
 
  I am trying to join an online class that uses python. I need to brush up
  on the language quickly. Is there a good book or resource that covers it
  well but does not have to explain what an if..then..else statement is?
 
  Thanks.
 
  Dive into python seems to be quite popular  can be read online fro free
 
 
 
  Learning Python by Mark Lutz, from O'Reilly is a good one, I've been
  reading it and it also enforces a comparison between C programming and
  Python. However, it's focused on Python 2, but it also mentions Python
  3 things in the text...
 
 
 There is a new edition out, copyright 2010 if I recall correctly, that
 updates its coverage to Python 3.x, which is the book's primary focus,
 though it points out where 3.x syntax does not work in version 2.x.
 
 Cheers!
 boB
 

Oh thanks! that I didn't knew...

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Embedding Python27 in C++ on Windows: CRT compatibility issues with VS2010?

2012-05-24 Thread Stephen Lin

Hello,

I'm a relative python newbie but I've been tasked to figure out how to
embed calls to a python library in an Excel XLL add-in.

The Python/C API for doing this seems pretty straightforward, but I
seem to have read somewhere online that it's important that the C++
program or DLL linking to and embedding Python must be using the same
CRT as what the Python implementation dll is using. Is this true, or
is the Python API written in such a way that there is no dependency on
a common CRT?

If there is a dependency, does that mean that I cannot use VS2010 to
develop this XLL, but should use VS2008 instead, or are there other
workarounds?

Thanks for the help,
Stephen
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Re: Email Id Verification

2012-05-24 Thread John Nagle


On 5/24/2012 5:32 AM, niks wrote:

Hello everyone..
I am new to asp.net...
I want to use Regular Expression validator in Email id verification..
Can anyone tell me how to use this and what is the meaning of
this
\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*


   Not a Python question.

   It matches anything that looks like a mail user name followed by
an @ followed by anything that looks more or less like a domain name.
The domain name must contain at least one ., and cannot end with
a ., which is not strictly correct but usually works.

John Nagle
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Re: Python Book for a C Programmer?

2012-05-24 Thread Jim Wilson

On 05/23/2012 07:45 PM, hsa...@gmail.com wrote:
 I am trying to join an online class that uses python. I need to brush up on 
 the language quickly. Is there a good book or resource that covers it well 
 but does not have to explain what an if..then..else statement is?
 
 Thanks.

My opinion: Martelli's Python in a Nutshell is the KR of Python.

Alas, it does discuss if statements, but it doesn't slap you silly with them.
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Help doing it the python way

2012-05-24 Thread Scott Siegler

Hello,

I am an experienced programmer but a beginner to python.  As such, I can figure 
out a way to code most algorithms using more C style syntax.

I am doing something now that I am sure is a more python way but i can't quite 
get it right.  I was hoping someone might help.

So I have a list of grid coordinates (x, y).  From that list, I want to create 
a new list that for each coordinate, I add the coordinate just above and just 
below (x,y+1) and (x,y-1)

right now I am using a for loop to go through all the coordinates and then 
separate append statements to add the top and bottom.

is there a way to do something like: [(x,y-1), (x,y+1) for zzz in coord_list] 
or something along those lines?

thanks!
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Re: Help doing it the python way

2012-05-24 Thread Duncan Booth

Scott Siegler scott.sieg...@gmail.com wrote:

 Hello,
 
 I am an experienced programmer but a beginner to python.  As such, I
 can figure out a way to code most algorithms using more C style
 syntax. 
 
 I am doing something now that I am sure is a more python way but i
 can't quite get it right.  I was hoping someone might help. 
 
 So I have a list of grid coordinates (x, y).  From that list, I want
 to create a new list that for each coordinate, I add the coordinate
 just above and just below (x,y+1) and (x,y-1) 
 
 right now I am using a for loop to go through all the coordinates and
 then separate append statements to add the top and bottom. 
 
 is there a way to do something like: [(x,y-1), (x,y+1) for zzz in
 coord_list] or something along those lines? 
 
 thanks!
 

def vertical_neighbours(coords):
for x, y in coords:
yield x, y-1
yield x, y+1

new_coords = list(vertical_neighbours(coords))


-- 
Duncan Booth http://kupuguy.blogspot.com
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Re: Help doing it the python way

Scott Siegler scott.sieg...@gmail.com writes:
 is there a way to do something like: 
[(x,y-1), (x,y+1) for zzz in coord_list]
 or something along those lines?

You should read the docs of the itertools module on general principles,
since they are very enlightening in many ways.  Your particular problem
can be handled with itertools.chain:
 
from itertools import chain
new_list = chain( ((x,y-1), (x,y+1)) for x,y in coord_list )

You can alternatively write an iterative loop:

   def gen_expand(coord_list):
 for x,y in coord_list:
   yield (x-1,y)
   yield (x+1, y)

   new_list = list(gen_expand(coord_list))
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Re: Help doing it the python way

2012-05-24 Thread Dave Angel

On 05/24/2012 04:22 PM, Scott Siegler wrote:
 Hello,

 I am an experienced programmer but a beginner to python.  As such, I can 
 figure out a way to code most algorithms using more C style syntax.

 I am doing something now that I am sure is a more python way but i can't 
 quite get it right.  I was hoping someone might help.

 So I have a list of grid coordinates (x, y).  From that list, I want to 
 create a new list that for each coordinate, I add the coordinate just above 
 and just below (x,y+1) and (x,y-1)

 right now I am using a for loop to go through all the coordinates and then 
 separate append statements to add the top and bottom.

 is there a way to do something like: [(x,y-1), (x,y+1) for zzz in coord_list] 
 or something along those lines?

 thanks!

So, where's the code that works?  That you want optimized, or
pythonified ?

Your algorithm description is sufficiently confusing that I'm going to
have make some wild guesses about what you're after.  Apparently you
have a list of tuples, and you want to create a second list that's
related to the first in the sense that each item (i) of list2 is the sum
of the items (i-1) and (i+1) of list1.  Presumably you mean sum as in
vector sum, where we add the x and y values, respectively.

Easiest way to handle edge conditions is to stick an extra (0,0) at both
the beginning and end of the list.

list1 = [ (3,7), (2,2), (944, -2), (12, 12) ]
def sumtuple(mytuple1, mytuple2):
return ( mytuple1[0] + mytuple2[0] , mytuple1[1] + mytuple2[1])

def makesum(list1):
list2 = []
list1a = [(0, 0)] + list1 + [(0, 0)]
for item1, item2 in zip(list1a, list1a[2:]):
list2.append( sumtuple(item1, item2) )
return list2

print makesum(list1)


output:
[(2, 2), (947, 5), (14, 14), (944, -2)]


Now, that undoubtedly isn't what you wanted, but perhaps you could
clarify the algorithm, so we could refine it.  No point in making it
more compact till it solves the problem you're actually interested in.





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DaveA

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Re: Help doing it the python way

Paul Rubin no.email@nospam.invalid writes:
 new_list = chain( ((x,y-1), (x,y+1)) for x,y in coord_list )

Sorry:

   new_list = list(chain( ((x,y-1), (x,y+1)) for x,y in coord_list))
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Re: problem loading matlab data with ompc and python

2012-05-24 Thread no1

On Thursday, May 24, 2012 5:06:41 AM UTC-7, Tim Williams wrote:
 On May 23, 5:10 pm, no1 no1.w...@gmail.com wrote:
  Hi, we're investigating transitioning our company from matlab to python. We 
  found OMPC as a MATLAB m-file-to Python translator, but we're encountering 
  a problem using the translated code to import MATLAB data structures into 
  Python. For example, when we save data within MATLAB this way:
 
  x.a = 5;
  x.b = 6;
  save -v6 test x
 
  this saves data in test.mat, with MATLAB version 6 compatibility (OMPC says 
  it's not compatible with the latest versions of MATLAB). The code to read 
  in data in MATLAB is just
 
  load test
 
  and when we run it through OMPC we get
 
  load(mstring('test.mat'))
 
  but when we run it we get the error message
 
  File ompclib\ompclib_numpy.py, line 1496, in load
  KeyError: [('a', '|O4'), ('b', '|O4')]
 
  Reading in simpler data (up to arrays) does not have this problem.
 
  To get other people in the company to transition, we were hoping that the 
  translation process could be done in one step or on the fly. We could read 
  in MATLAB data using I/O functions imported from scipy, but then the 
  transition isn't seamless any more.
 
  Is there a simple fix to using OMPC? Or a similar alternative that would 
  work better?
 
  Thanks
 
 Have you tried using loadmat from the scipy.io module?
 
 http://docs.scipy.org/doc/scipy/reference/io.html

Yes (I mentioned the scipi I/O module near the end of my original post) but we 
were hoping not to have to require the users to learn any Python to start. The 
simpler the process, the less resistance to using the new Python methodology; 
we were hoping the use of a single black box like translator (OMPC) would be 
enough. We'd really like to avoid any additional steps for the user, like 
rewriting code, otherwise the users are going to resist the transition.
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Re: Email Id Verification

2012-05-24 Thread Ben Finney

John Nagle na...@animats.com writes:

It matches anything that looks like a mail user name followed by
 an @ followed by anything that looks more or less like a domain name.
 The domain name must contain at least one ., and cannot end with
 a ., which is not strictly correct but usually works.

It will reject many valid email addresses.

For better guidance on verifying email address values, see the official
recommendations in RFC 3696 URL:https://tools.ietf.org/html/rfc3696.

In short: don't bother validating email addresses, the email system is
best placed to do that. Just try using them and catch the failures when
they happen.

-- 
 \   “He was the mildest-mannered man / That ever scuttled ship or |
  `\   cut a throat.” —“Lord” George Gordon Noel Byron, _Don Juan_ |
_o__)  |
Ben Finney
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Re: Wish: Allow all log Handlers to accept the level argument

2012-05-24 Thread Cameron Simpson

On 24May2012 12:48, Jean-Michel Pichavant jeanmic...@sequans.com wrote:
| Peter Otten wrote:
|  Jean-Michel Pichavant wrote:
|  Fayaz Yusuf Khan wrote:
|  Jean-Michel Pichavant wrote:
|  Meanwhile you can shorten the code this way:
|  root.addHandler(FileHandler('debug.log'))
|  root.handlers[-1].setLevel(DEBUG)
|  
|  Eh? Readability was the aim.
|
|  I fail to see how it's not readable, code is short and no magic is
|  involved provided you know about slicing list items. Anyway, to answer
| 
|  You have to know or verify that .addHandler() appends to the .handlers 
list, 
|  you have to check if or under which conditions
| 
|  h = SomeHandler()
|  root.addHandler(h)
|  assert h is root.handlers[-1]
| 
|  can fail. In short, if I see such a hack my trust in the author of that 
code 
|  is significantly lowered.
|
| I now fail to see how it's a hack. handlers is a public attribute of 
| loggers.
| 
| FYI
| 
| def addHandler(self, hdlr):
| 
| Add the specified handler to this logger.
| 
| if not (hdlr in self.handlers):
| self.handlers.append(hdlr)

Nothing there says handlers is a list. (Nothing in the docs says that the
.handlers even exists, AFAICS.) Might be a set or something more esoteric.
Particularly, if I wanted to add and remove handlers a lot I might well
expect (or at least imagine) it to be a set.

So I too find:

  root.handlers[-1]

a risky thing to say, and harder to read because it assumes something I
would not want to rely on. Versus the original proposal that avoids all
need to know how logging tracks its handler internally.

Cheers,
-- 
Cameron Simpson c...@zip.com.au DoD#743
http://www.cskk.ezoshosting.com/cs/

The reason that God was able to create the world in seven days is that he
didn't have to worry about the installed base.  - Enzo Torresi
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Re: Email Id Verification

2012-05-24 Thread Cameron Simpson

On 25May2012 01:20, Chris Angelico ros...@gmail.com wrote:
| On Thu, May 24, 2012 at 11:45 PM, Dennis Lee Bieber
| wlfr...@ix.netcom.com wrote:
|         And maybe follow-up with a review of this monster:
|  http://www.ex-parrot.com/pdw/Mail-RFC822-Address.html
| 
| That is awesome. Epic. Eyeball-bleeding.

+1 !!

I hope someone's validated that regexp before using it to validate email
addresses:-) I'm amazed. (And amazed that the sheer code smell doesn't
drive the author away from suggesting it.)

The mere presence of nesting comments in RFC2822 addresses prevents
using a single regexp to parse them.
-- 
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It's state-of-the-art But it doesn't work! That is the state-of-the-art.
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Re: Email Id Verification

2012-05-24 Thread Cameron Simpson

On 24May2012 05:32, niks nikunjparmar...@gmail.com wrote:
| Hello everyone..
| I am new to asp.net...

Time to run away fast before you're commited then:-)
You're aware this is a _python_ list/group, yes?

| I want to use Regular Expression validator in Email id verification..

You can't. Valid addresses including nesting comments. Regexps don't do
recursion.

| Can anyone tell me how to use this and what is the meaning of
| this
| \w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*

If you don't understand it, DON'T use it. And in any case, it is
simplistic (== wrong). As pointed out by others in this thread.
-- 
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http://www.cskk.ezoshosting.com/cs/

Men are four:
He who knows and knows that he knows; he is wise, follow him.
He who knows and knows not that he knows; he is asleep, wake him.
He who knows not and knows that he knows not; he is ignorant, teach him.
He who knows not and knows not that he knows not; he is a fool, spurn him!
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Re: Help doing it the python way

2012-05-24 Thread Emile van Sebille


On 5/24/2012 2:30 PM Paul Rubin said...

Paul Rubinno.email@nospam.invalid  writes:

 new_list = chain( ((x,y-1), (x,y+1)) for x,y in coord_list )


Sorry:

new_list = list(chain( ((x,y-1), (x,y+1)) for x,y in coord_list))



 from itertools import chain
 coord_list = zip(range(20,30),range(30,40))
 a = [((x,y-1),(x,y+1)) for x,y in coord_list]
 b = list(chain(((x,y-1),(x,y+1)) for x,y in coord_list))
 a == b
True


So, why use chain?  Is it a premature optimization?  Similar to the 
practice of using .join(targets) vs targeta+targetb+...+targetn?


Emile


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Re: Email Id Verification

On Fri, May 25, 2012 at 9:03 AM, Cameron Simpson c...@zip.com.au wrote:
 On 24May2012 05:32, niks nikunjparmar...@gmail.com wrote:
 | Hello everyone..
 | I am new to asp.net...

 Time to run away fast before you're commited then:-)
 You're aware this is a _python_ list/group, yes?

Committed to an asylum or to source control?

Python is an asylum. Ruled by a Benevolent Inmate For Life. And yes,
it's a life sentence.

ChrisA
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Re: Email Id Verification

On Thu, 24 May 2012 05:32:16 -0700, niks wrote:

 Hello everyone..
 I am new to asp.net...
 I want to use Regular Expression validator in Email id verification..

Why do you want to write buggy code that makes your users hate your 
program? Don't do it! Write good code, useful code! Validating email 
addresses is the wrong thing to do.

The only way to validate an email address is to ACTUALLY SEND AN EMAIL TO 
IT. That is all. Just because an address is syntactically valid doesn't 
mean it is deliverable.

You can't validate postal addresses. How would you even try? Even if you 
could, you wouldn't use a regex for it. That's the post office's job to 
decide whether mail can be delivered, not yours. Who are you to say that 
some address in Russia or Bolivia or Kuwait is invalid?

Email addresses are no different. It is the job of the mail server to 
decide whether email can be delivered, not yours.

http://northernplanets.blogspot.com.au/2007/03/how-not-to-validate-email-addresses.html

http://haacked.com/archive/2007/08/21/i-knew-how-to-validate-an-email-address-until-i.aspx

http://haacked.com/archive/2007/08/26/dont-be-a-validation-nazi.aspx


-- 
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Re: Email Id Verification

2012-05-24 Thread MRAB


On 25/05/2012 00:03, Cameron Simpson wrote:

On 24May2012 05:32, niksnikunjparmar...@gmail.com  wrote:
| Hello everyone..
| I am new to asp.net...

Time to run away fast before you're commited then:-)
You're aware this is a _python_ list/group, yes?

| I want to use Regular Expression validator in Email id verification..

You can't. Valid addresses including nesting comments. Regexps don't do
recursion.


Some regex implementations _can_ do recursion.


| Can anyone tell me how to use this and what is the meaning of
| this
| \w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*

If you don't understand it, DON'T use it. And in any case, it is
simplistic (== wrong). As pointed out by others in this thread.


True, it's the wrong tool for the job.
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Re: Dynamic comparison operators

On Thu, 24 May 2012 11:22:37 -0400, Colin J. Williams wrote:

 On 24/05/2012 10:14 AM, mlangenho...@gmail.com wrote:
 I would like to pass something like this into a function
 test(val1,val2,'=')

 and it should come back with True or False.

 Is there a way to dynamically compare 2 values like this or will I have
 to code each operator individually?
 
 Would something like the following meet your need?
 
 Yes, it would be nice if there were a b.__name__ constant.

What is a b.__name__ constant, and how will it be useful?

As for your solution using eval, please, please, PLEASE do not encourage 
newbies to write slow, insecure, dangerous code. There are enough 
security holes in software without you encouraging people to create more.

* eval is slow.

* eval is dangerous.

* eval is using a 200lb sledgehammer to crack a peanut.

Any time you find yourself thinking that you want to use eval to solve a 
problem, take a long, cold shower until the urge goes away.

If you have to ask why eval is dangerous, then you don't know enough 
about programming to use it safely. Scrub it out of your life until you 
have learned about code injection attacks, data sanitation, trusted and 
untrusted input. Then you can come back to eval and use it safely and 
appropriately.

Today, your test function using eval is used only by yourself, at the 
interactive interpreter. Tomorrow, it ends up in a web application, and 
random hackers in China and script-kiddies in Bulgaria now have total 
control of your server. Any time you hear about some piece of malware or 
some virus infecting people's systems when they look at a PDF file, 
chances are high that it is a code injection attack.

To learn more, you can start here:

http://cwe.mitre.org/top25/index.html

Two of the top three most common vulnerabilities are code injection 
attacks, similar to the improper use of eval.

Here is the eval injection vulnerability:

http://cwe.mitre.org/data/definitions/95.html

Also google on code injection for many more examples.



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Steven
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Scoping Issues

2012-05-24 Thread SherjilOzair

def adder():
s = 0
def a(x):
s += x
return sum
return a

pos, neg = adder(), adder()
for i in range(10):
print pos(i), neg(-2*i)

This should work, right? Why does it not?

Checkout slide no. 37 of a Tour of Go to know inspiration. Just wanted to see 
if python was the same as Go in this regard. Sorry, if I'm being rude, or 
anything. 
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Re: Email Id Verification

Steven D'Aprano steve+comp.lang.pyt...@pearwood.info writes:
 Why do you want to write buggy code that makes your users hate your 
 program? ...
 The only way to validate an email address is to ACTUALLY SEND AN EMAIL TO 
 IT. 

Of course spamming people will make them hate you even more.  Insisting
that people give you a valid email address (unless you have a
demonstrably legitimate use for it) is a variant of that.
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Re: Dynamic comparison operators

mlangenho...@gmail.com writes:
 I would like to pass something like this into a function
 test(val1,val2,'=')

 and it should come back with True or False.

import operator

test(val1, val2, operator.ge)
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Re: Scoping Issues

2012-05-24 Thread MRAB


On 25/05/2012 02:23, SherjilOzair wrote:

def adder():
s = 0
def a(x):
s += x
return sum
return a

pos, neg = adder(), adder()
for i in range(10):
print pos(i), neg(-2*i)

This should work, right? Why does it not?

Checkout slide no. 37 of a Tour of Go to know inspiration. Just wanted
to see if python was the same as Go in this regard. Sorry, if I'm being
rude, or anything.


If you bind to a name (assign to a variable) in a function, that name
is by default local to the function unless it's declared as global 
(which means in this module's namespace) or nonlocal (which means

in the enclosing function's namespace) (Python 3 only).
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Re: Email Id Verification

On Thu, 24 May 2012 18:35:21 -0700, Paul Rubin wrote:

 Steven D'Aprano steve+comp.lang.pyt...@pearwood.info writes:
 Why do you want to write buggy code that makes your users hate your
 program? ...
 The only way to validate an email address is to ACTUALLY SEND AN EMAIL
 TO IT.
 
 Of course spamming people will make them hate you even more.  Insisting
 that people give you a valid email address (unless you have a
 demonstrably legitimate use for it) is a variant of that.

Ha, of course. I assumed that the OP actually has a valid reason for 
requesting an email address from the user.


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Re: Scoping Issues

On Thu, 24 May 2012 18:23:18 -0700, SherjilOzair wrote:

 def adder():
   s = 0
   def a(x):
   s += x
   return sum
   return a

I think you mean return s, not sum.


 This should work, right? Why does it not?

No, it shouldn't. When you have an assignment, such as s += x, Python 
treats s as a local variable. Since s is local to the inner function a(), 
it has no initial value, and the += fails.

In Python 3, you can declare s to be a non-local variable with the 
nonlocal keyword:

def adder():
s = 0
def a(x):
nonlocal s
s += x
return s
return a


which now works the way you should expect:

 add = adder()
 add(1)
1
 add(2)
3
 add(5)
8


But in Python 2, which you are using, there is no nonlocal keyword and 
you can only write to globals (declaring them with the global keyword) or 
locals (with no declaration), not nonlocals.

There are a number of work-arounds to this. One is to use a callable 
class:

class Adder:
def __init__(self):
self.s = 0
def __call__(self, x):
self.s += x
return self.s


Another is to use an extra level of indirection, and a mutable argument. 
Instead of rebinding the non-local, you simply modify it in place:

def adder():
s = [0]
def a(x):
s[0] += x
return s[0]
return a



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Re: Scoping Issues

2012-05-24 Thread Chris Rebert

On Thu, May 24, 2012 at 6:23 PM, SherjilOzair sherjiloz...@gmail.com wrote:
 def adder():
        s = 0
        def a(x):

Add a nonlocal s declaration right here.
See http://www.python.org/dev/peps/pep-3104/

            s += x
            return sum
        return a

 pos, neg = adder(), adder()
 for i in range(10):
        print pos(i), neg(-2*i)

 This should work, right? Why does it not?

Python doesn't have a C-like variable declaration scheme. So without a
`global` or `nonlocal` declaration, you can only assign to names which
reside in the innermost scope.

 Checkout slide no. 37 of a Tour of Go to know inspiration.

You mean slide #38 (And functions are full closures.).

 Just wanted to see if python was the same as Go in this regard. Sorry, if I'm 
 being rude, or anything.

I would suggest reading through the Python Language Reference
(http://docs.python.org/release/3.1.5/reference/index.html ) prior to
asking further questions, as it may well answer them for you.

Cheers,
Chris
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Re: Embedding Python27 in C++ on Windows: CRT compatibility issues with VS2010?

2012-05-24 Thread Mark Hammond


On 25/05/2012 2:10 AM, Stephen Lin wrote:

Hello,

I'm a relative python newbie but I've been tasked to figure out how to
embed calls to a python library in an Excel XLL add-in.

The Python/C API for doing this seems pretty straightforward, but I
seem to have read somewhere online that it's important that the C++
program or DLL linking to and embedding Python must be using the same
CRT as what the Python implementation dll is using. Is this true, or
is the Python API written in such a way that there is no dependency on
a common CRT?


It depends on the APIs you use.  eg, some APIs take a FILE * and some 
may take ownership of memory - such APIs needs to use the same CRT. 
APIs that don't attempt to share CRT objects should be fine.


Mark


If there is a dependency, does that mean that I cannot use VS2010 to
develop this XLL, but should use VS2008 instead, or are there other
workarounds?

Thanks for the help,
Stephen




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Re: Scoping Issues

2012-05-24 Thread Dave Angel

On 05/24/2012 09:23 PM, SherjilOzair wrote:
 def adder():
   s = 0
   def a(x):
   s += x
   return sum
   return a

 pos, neg = adder(), adder()
 for i in range(10):
   print pos(i), neg(-2*i)

 This should work, right? Why does it not?


Guess that depends on what you mean by work.  First, it gets a syntax
error on the print function call, because you omitted the parens.  When
I fixed that, I got
   UnboundLocalError: local variable 's' referenced before assignment

so I fixed that, and got
 inconsistent use of tabs and spaces in indentation

because you mistakenly used tabs for indentation. Then I got the output
built-in function sum built-in function sum

because sum is a built-in function.  Presumably you meant to return s,
not sum.

Here's what I end up with, and it seems to work fine in Python 3.2 on Linux:

def adder():
s = 0
def a(x):
nonlocal s
s += x
return s
return a

pos, neg = adder(), adder()
for i in range(10):
print (pos(i), neg(-2*i))

.
Output is:

0 0
1 -2
3 -6
6 -12
10 -20
15 -30
21 -42
28 -56
36 -72
45 -90


-- 

DaveA

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Re: Email Id Verification

On Fri, May 25, 2012 at 11:35 AM, Paul Rubin no.email@nospam.invalid wrote:
 Steven D'Aprano steve+comp.lang.pyt...@pearwood.info writes:
 Why do you want to write buggy code that makes your users hate your
 program? ...
 The only way to validate an email address is to ACTUALLY SEND AN EMAIL TO
 IT.

 Of course spamming people will make them hate you even more.  Insisting
 that people give you a valid email address (unless you have a
 demonstrably legitimate use for it) is a variant of that.

But why do you want to validate the email address? That's the
question. Usually it's because you're going to be sending emails to
that address, in which case you not only want to ensure that it's a
real address, you want to ensure that the person who keyed it in is
legitimately allowed to do so - the usual implementation of that being
please check your emails for the confirmation code.

There are, however, ways of not-quite-sending an email. For instance,
you can connect to the domain's MX, give your HELO, MAIL FROM, and
RCPT TO commands, and then quit before sending any DATA. That won't
give a 100% guarantee, but it'll certainly tell you about a lot of
failures (most of them in that first megastep of looking up the domain
in DNS to find its MX record, and then attempting a connection).

Now, if your goal is to recognize email addresses in plain text (eg to
make them clickable), then you probably don't want true validation -
you want more of a DWIM setup where common tails aren't included
[for instance, an email address followed by a close bracket, like
f...@bar.com]. That's completely different.

ChrisA
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Re: Scoping Issues

2012-05-24 Thread Andrew Berg

On 5/24/2012 8:59 PM, Dave Angel wrote:
 so I fixed that, and got
  inconsistent use of tabs and spaces in indentation
 
 because you mistakenly used tabs for indentation.
Not to start another tabs-vs.-spaces discussion, but tabs are perfectly
legal indentation in Python. That exception is raised when the
interpreter can't determine how much a line is indented because tabs and
spaces are both used.

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Re: Namespace hack

Pardon me for breaking threading, but Daniel's response is not available 
on my ISP's news server, and I only discovered it by accident.

On Thu May 24 15:04:34 CEST 2012, Daniel Fetchinson fetchinson at 
googlemail.com wrote:

  On Thu, 24 May 2012 08:50:59 +, Steven D'Aprano wrote:
  From the Zen of Python (import this):
  Namespaces are one honking great idea -- let's do more of those!
[...]

 Funny, you got to the last line of import this but apparently
 skipped the second line:
 
 Explicit is better than implicit.
 
 And you didn't even post your message on April 1 so no, I can't laugh
 even though I'd like to.

Do you object to the ability to write standard Python modules?

# module.py
def spam(obj, n):
return len(obj) + n

def ham(obj):
return spam(obj, 23)


By your apparent misunderstanding of the Zen, you think that this should 
be written with oodles of more explicitness, 'cos explicit is always 
better, right?

keyword.def globals.spam(locals.obj, locals.n):
keyword.return builtin.len(locals.obj) + locals.n

keyword.def globals.ham(locals.obj):
keyword.return globals.spam(locals.obj, 23)


Python, like most (all?) non-trivial languages, has scoping rules so that 
you can refer to names without explicitly specifying which namespace they 
are in. So long as this is unambiguous, Explicit vs Implicit is 
irrelevant if not outright wrong.

My namespace decorator simply applies a slightly different set of scoping 
rules to the ones you are already used to in modules. It's no worse than 
nested functions (hardly a surprise, because it is built on nested 
functions!) or module-level scoping rules.


-- 
Steven
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Is there a custom fields plugin or component of django

2012-05-24 Thread kevon wang

I want to find a plugin of django what it can custom fields in the form. The 
functions include custom fields in web page and create the fields in database.

plugin's flow like these:
1.we can define fields in web page  

 -- 2.create the table in database(table includes all custom fields)

-- 3.generate CURD operations in web server 

-- 4.we can CURD records in web pages.

I want to know whether there is a plugin or component of django, If there is 
please tell me. Maybe there is the other plugin like this as well.
 
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Re: Help doing it the python way

2012-05-24 Thread Terry Reedy


On 5/24/2012 4:53 PM, Duncan Booth wrote:

Scott Sieglerscott.sieg...@gmail.com  wrote:


Hello,

I am an experienced programmer but a beginner to python.  As such, I
can figure out a way to code most algorithms using more C style
syntax.


Hi, welcome to Python. I came here from C also.


I am doing something now that I am sure is a more python way but i
can't quite get it right.  I was hoping someone might help.

So I have a list of grid coordinates (x, y).  From that list, I want
to create a new list that for each coordinate, I add the coordinate
just above and just below (x,y+1) and (x,y-1)


The Python way, especially the Python 3 way, is to not make the new 
sequence into a concrete list unless you actually need a list to append 
or sort or otherwise mutate. In many use cases, that is not necessary.



right now I am using a for loop to go through all the coordinates and
then separate append statements to add the top and bottom.

is there a way to do something like: [(x,y-1), (x,y+1) for zzz in
coord_list] or something along those lines?



def vertical_neighbours(coords):
 for x, y in coords:
 yield x, y-1
 yield x, y+1

new_coords = list(vertical_neighbours(coords))


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Re: Scoping Issues

2012-05-24 Thread Dave Angel

On 05/24/2012 10:27 PM, Andrew Berg wrote:
 On 5/24/2012 8:59 PM, Dave Angel wrote:
 so I fixed that, and got
  inconsistent use of tabs and spaces in indentation

 because you mistakenly used tabs for indentation.
 Not to start another tabs-vs.-spaces discussion, but tabs are perfectly
 legal indentation in Python. That exception is raised when the
 interpreter can't determine how much a line is indented because tabs and
 spaces are both used.


I configure my editor(s) to always use spaces for indentation.  So a
file that currently uses tabs is unusable to me.  You of course are
right that tabs are syntactically correct, but until I find another
editor that makes tabs visible (like the one I used 20 years ago)
they're unacceptable to me.

-- 

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Re: Email Id Verification

2012-05-24 Thread Ben Finney

Paul Rubin no.email@nospam.invalid writes:

 Steven D'Aprano steve+comp.lang.pyt...@pearwood.info writes:
  Why do you want to write buggy code that makes your users hate your 
  program? ...
  The only way to validate an email address is to ACTUALLY SEND AN EMAIL TO 
  IT. 

 Of course spamming people will make them hate you even more.

Use the email address without spamming, then.

The point is that, having collected the email address, it's useless
unless one actually uses it *as an email address*, by sending a message
to it. Before then, “validating” it tells you nothing.

 Insisting that people give you a valid email address (unless you have
 a demonstrably legitimate use for it) is a variant of that.

And matching it against a regex is going to either get it wrong
(rejecting many valid email addresses), or be useless (accepting just
about anything as “valid”).

The test which matters is to use the value as an email address, by
sending a message when the time comes to do that.

-- 
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  `\  need to complain.” —Jane Wagner, via Lily Tomlin |
_o__)  |
Ben Finney
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Re: Namespace hack

2012-05-24 Thread Temia Eszteri

[Default] On 25 May 2012 02:47:11 GMT, Steven D'Aprano
steve+comp.lang.pyt...@pearwood.info wrote:

Do you object to the ability to write standard Python modules?

# module.py
def spam(obj, n):
return len(obj) + n

def ham(obj):
return spam(obj, 23)


By your apparent misunderstanding of the Zen, you think that this should 
be written with oodles of more explicitness, 'cos explicit is always 
better, right?

keyword.def globals.spam(locals.obj, locals.n):
keyword.return builtin.len(locals.obj) + locals.n

keyword.def globals.ham(locals.obj):
keyword.return globals.spam(locals.obj, 23)


Python, like most (all?) non-trivial languages, has scoping rules so that 
you can refer to names without explicitly specifying which namespace they 
are in. So long as this is unambiguous, Explicit vs Implicit is 
irrelevant if not outright wrong.

My namespace decorator simply applies a slightly different set of scoping 
rules to the ones you are already used to in modules. It's no worse than 
nested functions (hardly a surprise, because it is built on nested 
functions!) or module-level scoping rules.


-- 
Steven

But then we've got Simple is better than complex, and Complex is
better than complicated. Of course if we decided to start iterating
through the zen of Python's verses and continually modifying the
example code to fit, it would get rather silly rather fast.

~Temia
--
When on earth, do as the earthlings do.
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Re: Email Id Verification

Ben Finney ben+pyt...@benfinney.id.au writes:
 The point is that, having collected the email address, it's useless
 unless one actually uses it *as an email address*, by sending a message
 to it. Before then, “validating” it tells you nothing.

Right, the only legitimate use of an email address is sending legitimate
email to it.  An example might be collecting an address so that service
staff can respond to a help request.  If there is not an up-front, good
reason to want to email the address, then collecting it is not
legitimate.  An example is web sites where users have to supply
addresses to register.  This is why mailinator.com was invented, but
it's annoying even if you use mailinator.
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Re: Namespace hack