Comparing UTF-8 into USC-2 and vice versa (newbie :-) )

[Tzury]

I recently rewrote a .net application in python.
The application is basically gets streams via TCP socket and handle
operations against an existing database.
The Database is SQLite3 (Encoded as UTF-8).
The Networks streams are encoded as UCS-2.

Since in UCS-2, 'A' = '0041' and when I check  with the built-in
functions I get for  unicode("A", "utf-8") = u'A' = u'\u0041'. I
wonder what is the difference, and how can I safely encode/decode
UCS-2 streams and match them with the UTF-8 representation

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Re: Comparing UTF-8 into USC-2 and vice versa (newbie :-) )

[Tzury]

On Jun 17, 10:48 am, "Martin v. Löwis" <[EMAIL PROTECTED]> wrote:
> > I recently rewrote a .net application in python.
> > The application is basically gets streams via TCP socket and handle
> > operations against an existing database.
> > The Database is SQLite3 (Encoded as UTF-8).
> > The Networks streams are encoded as UCS-2.
>
> > Since in UCS-2, 'A' = '0041' and when I check  with the built-in
> > functions I get for  unicode("A", "utf-8") = u'A' = u'\u0041'. I
> > wonder what is the difference, and how can I safely encode/decode
> > UCS-2 streams and match them with the UTF-8 representation
>
> In unicode("A", "utf-8"), the "utf-8" parameter does *not* mean
> that the output is in UTF-8, but the *input*.
> So "A" = '41' != '0041'. In UCS-2, the A consumes two bytes; in
> UTF-8, it consumes only one byte.
>
> For different letters, that's different: For example, for u'\xf6',
> the UCS-2 representation (big-endian) is '00F6', for UTF-8, it is
> 'C3B6'. For u'\u20AC', the UCS-2 is '20AC', the UTF-8 is 'E282AC'
> (i.e. three bytes).
>
> You should use Unicode objects in your program always, and encode
> to or from UCS-2 or UTF-8 only when interfacing with the
> network/database.
>
> HTH,
> Martin

Thanks Martin for this guideline

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Re: Comparing UTF-8 into USC-2 and vice versa (newbie :-) )

[Tzury]

On Jun 17, 10:48 am, "Martin v. Löwis" <[EMAIL PROTECTED]> wrote:
> > I recently rewrote a .net application in python.
> > The application is basically gets streams via TCP socket and handle
> > operations against an existing database.
> > The Database is SQLite3 (Encoded as UTF-8).
> > The Networks streams are encoded as UCS-2.
>
> > Since in UCS-2, 'A' = '0041' and when I check  with the built-in
> > functions I get for  unicode("A", "utf-8") = u'A' = u'\u0041'. I
> > wonder what is the difference, and how can I safely encode/decode
> > UCS-2 streams and match them with the UTF-8 representation
>
> In unicode("A", "utf-8"), the "utf-8" parameter does *not* mean
> that the output is in UTF-8, but the *input*.
> So "A" = '41' != '0041'. In UCS-2, the A consumes two bytes; in
> UTF-8, it consumes only one byte.
>
> For different letters, that's different: For example, for u'\xf6',
> the UCS-2 representation (big-endian) is '00F6', for UTF-8, it is
> 'C3B6'. For u'\u20AC', the UCS-2 is '20AC', the UTF-8 is 'E282AC'
> (i.e. three bytes).
>
> You should use Unicode objects in your program always, and encode
> to or from UCS-2 or UTF-8 only when interfacing with the
> network/database.
>
> HTH,
> Martin

Thanks Martin for this guideline. But in fact say I get a USC-2 string
and need to compare it with UTF-8 value in the database. How can I do
it given the Python built-in libraries?

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Re: Comparing UTF-8 into USC-2 and vice versa (newbie :-) )

[Tzury]

Yet,
'utf_16_be' is not 'ucs-2'.
How would I get ucs-2 encoding and decoding functionality with python?

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MaildirMessage

[Tzury]

I am getting the following error when trying to iterate in a message
in a Maildir directory.
please help.

>>> from mailbox import Maildir, MaildirMessage
>>> mbox = Maildir('path/to/mailbox', create = False, factory = MaildirMessage)
>>> for msg in mbox:
... for m in msg:
... print m
...
Traceback (most recent call last):
  File "", line 2, in 
  File "email/message.py", line 286, in __getitem__
  File "email/message.py", line 352, in get
AttributeError: 'int' object has no attribute 'lower'
>>>

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Re: MaildirMessage

[Tzury]

> Which is a bug in the 'email.message' module, in my view. If it's
> attempting to support a mapping protocol, it should allow iteration
> the same way standard Python mappings do: by iterating over the keys.

I thought it is a bug as well, but who am I a python newbie to say so.
I found inspect.getmembers(msg) as a good solution to map the message
properties.

10x,
Tzury

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Re: MaildirMessage

[Tzury]

> What do you actually think
>
> ... for m in msg:
> ... print m
>
> should do? Why do you believe that what you think it should do would be
> a natural choice?

I needed to know how to extract particular parts of a message, such as
the message 'body', 'subject', 'author', etc.
I couldn't find it in the documentation this kind of information until
I ran the inspect.getmembers(msg) and found out that the message body
stored in _payload. that is msg._payload is the content of the
message.

Regarding the *bug* thing it is very simple. If you iterate an int you
get an exception , clear
enough. Yet here I got the following exception  which suggest an attempt to iterate
---. I do think that a message should support iteration for the very
fact that each can contain a different type and amount of headers, and
iteration in this case will make application's code clean and unified.

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ctypes, windll question

[Tzury]

I followed the tutorial about ctypes and I still cannot figure out how
to call a method of a calss within the dll.

For example:
a dll named 'foo' contain a class named 'bar' which expose a method
named 'baz'.

if I either do:

mydll = windll.foo
mycls = mydll.bar

or
mycls = windll.foo.bar

or
mycls = windll.foo.bar()

I get an erros: "function 'bar' not found " which is true since while
bar is a class. Yet, I need to know how to create an instance of this
inner class so I can access its public methods.

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ctypes windll question

[Tzury]

I followed the tutorial about ctypes and I still cannot figure out how
to call a method of a calss within the dll.

For example:
a dll named 'foo' contain a class named 'bar' which expose a method
named 'baz'.

if I either do:

mydll = windll.foo
mycls = mydll.bar

or
mycls = windll.foo.bar

or
mycls = windll.foo.bar()

I get an erros: "function 'bar' not found " which is right, since bar
is a class and not a function. However, I still need to  create an
instance of this inner class (bar) so I can access its public method
(baz).

I cannot find anywhere instructions for that.

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Re: ctypes windll question

[Tzury]

I discovered pywin32-210.win32-py2.5 package which does all the work
for me.

Open Software world is a great place to live by

On Aug 14, 12:45 pm, Tzury <[EMAIL PROTECTED]> wrote:
> I followed the tutorial about ctypes and I still cannot figure out how
> to call a method of a calss within the dll.
>
> For example:
> a dll named 'foo' contain a class named 'bar' which expose a method
> named 'baz'.
>
> if I either do:
>
> mydll = windll.foo
> mycls = mydll.bar
>
> or
> mycls = windll.foo.bar
>
> or
> mycls = windll.foo.bar()
>
> I get an erros: "function 'bar' not found " which is right, since bar
> is a class and not a function. However, I still need to  create an
> instance of this inner class (bar) so I can access its public method
> (baz).
>
> I cannot find anywhere instructions for that.


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How to query a unicode data from sqlite database

[Tzury]

Can anyone tell the technique of composing a WHERE clause that refer
to a unicode data. e.g.  "WHERE FirstName = ABCD" where ABCD is  the
unicoded first name in the form that sqlite will match with its
records.

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Setting System Date And Time

[Tzury]

Is it possible to modify the Systems' Date and Time with python?

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Having fun with python

[Tzury]

def loadResMap(self):
self.resMap = []
[[self.resMap.append(str('A2' + sim[0] + '/r' + str(x)))
for x in range(1, eval(sim[1])+1)]
for sim in [x.split(':')
for x in quickViews.smsResList.v.split(",")]]
'''
# Confused? Have this one:

data = quickViews.smsResList.v
sims, slots = [], data.split(",")
for slot in slots:
sims.append(slot.split(':'))
for sim in sims:
for x in range(1, eval(sim[1])+1):
self.resMap.append(str('A2' + sim[0] + '/r' +
str(x)))

# same functionality different approaches
# forloops vs. list comprehension
# redability vs. smartassicity
# AKA: You have read too many Lisp books
'''

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Python, Embedded linux and web development

[Tzury]

Regarding the platform described below, can anyone suggest from his
experience what would be the best library choice to develop the
following application.

a) application that deals with data transformed via TCP sockets.
b) reading and writing to and from sqlite3 (include Unicode
manipulations).
c) small web application that will be used as front end to configure
the system (flat files and sqlite3 db are the back-end).

Our platform is base on the Intel PXA270 processor (XSCALE family,
which is ARM compatible) running at 312MHz.

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Re: Python, Embedded linux and web development

[Tzury]

On Feb 27, 2:27 pm, "Paul Boddie" <[EMAIL PROTECTED]> wrote:
> On 27 Feb, 13:12, "Tzury" <[EMAIL PROTECTED]> wrote:
>
>
>
> > c) small web application that will be used as front end to configure
> > the system (flat files and sqlite3 db are the back-end).
>
> > Our platform is base on the Intel PXA270 processor (XSCALE family,
> > which is ARM compatible) running at 312MHz.
>
> You might want to read this article which got mentioned fairly
> recently either on comp.lang.python or on some blog or other:
>
> http://www.linuxdevices.com/articles/AT5550934609.html
>
> Paul

Thanks for the quick response. good article

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querying unicode data (sqlite) with python

[Tzury]

Given an sqlite db that stores the strings data such as names, etc.
encoded in Unicode.
How do I write a sql query statement with 'LIKE' or '=' operators and
insert the Unicoded name.

for example:

in table MY_TABLE, in column COL01 there is a value "¿Habla español?"
within python I represent this value as  u'\u00bfHabla espa\u00f1ol?'

if I wish to produce a query that will fetch this row something like
"SELECT * FROM MY_TABLE WHERE COL01="¿Habla español?" and I want it to
be done dynamically according to data I receive from a tcp socket.

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Re: Having fun with python

[Tzury Bar Yochay]

> However, one point you have shown very clearly: the second one is much
> easier to tear apart and reassemble.

Sure.
Zen Of Python: Readbility Counts

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a simple tcp server sample

[Tzury Bar Yochay]

hi, the following sample (from docs.python.org) is a server that can
actually serve only single client at a time.

In my case I need a simple server that can serve more than one client.
I couldn't find an example on how to do that and be glad to get a
hint.

Thanks in advance

import socket

HOST = '127.0.0.1'  # Symbolic name meaning the local host
PORT = 50007# Arbitrary non-privileged port

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((HOST, PORT))
s.listen(1)
conn, addr = s.accept()

print 'Connected by', addr

while 1:
data = conn.recv(1024)
if not data:
break
conn.send(data)

conn.close()

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Re: a simple tcp server sample

[Tzury Bar Yochay]

> Even simpler, use Twisted:

I am afraid Twisted is not the right choice in my case. I am looking
for smaller, simpler and minimal server sample.

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Re: a simple tcp server sample

[Tzury Bar Yochay]

> See the SocketServer module, both the documentation and the source code.

I firstly looked at this module and its __doc__, yet I still need an
'hello world' sample. and couldn't get it straight how can I write my
own hello world sample with SocketServer objects.


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Re: a simple tcp server sample

[Tzury Bar Yochay]

here is its:
# a simple tcp server

import SocketServer


class EchoRequestHandler(SocketServer.BaseRequestHandler ):
def setup(self):
print self.client_address, 'connected!'
self.request.send('hi ' + str(self.client_address) + '\n')

def handle(self):
while 1:
data = self.request.recv(1024)
self.request.send(data)
if data.strip() == 'bye':
return

def finish(self):
print self.client_address, 'disconnected!'
self.request.send('bye ' + str(self.client_address) + '\n')

#server host is a tuple ('host', port)
server = SocketServer.ThreadingTCPServer(('', 50008),
EchoRequestHandler)
server.serve_forever()

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100% CPU Usage when a tcp client is disconnected

[Tzury Bar Yochay]

The following is a code I am using for a simple tcp echo server.
When I run it and then connect to it (with Telnet for example) if I
shout down the telnet the CPU tops 100% of usage and saty there
forever.
Can one tell what am I doing wrong?

#code.py

import SocketServer

class MyServer(SocketServer.BaseRequestHandler ):
def setup(self):
print self.client_address, 'connected!'
self.request.send('hi ' + str(self.client_address) + '\n')

def handle(self):
while 1:
data = self.request.recv(1024)
self.request.send(data)
if data.strip() == 'bye':
return

def finish(self):
print self.client_address, 'disconnected!'
self.request.send('bye ' + str(self.client_address) + '\n')

#server host is a tuple ('host', port)
server = SocketServer.ThreadingTCPServer(('', 50008), MyServer)
server.serve_forever()
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Re: 100% CPU Usage when a tcp client is disconnected

[Tzury Bar Yochay]

> data = "dummy"
> while data:
> ...

Thanks Alot
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Re: 100% CPU Usage when a tcp client is disconnected

[Tzury Bar Yochay]

Thank Hrvoje as well
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To PEAK or not to PEAK

[Tzury Bar Yochay]

I am about to start a large-scale enterprise project next month (I
insist on using Python instead Java and .NET and I am sure `they` will
thank me eventually).

I was wondering around making my components-and-libraries-shopping-
list and came across PEAK.
My paranoia is that PEAK would make me write my application in PEAK
instead of Python
(I felt that in the past with Django).

Therefore, I would like to hear the voices of you which have any
experience with PEAK.
Whether you are using it or used it in the past or tried to use it and
abandoned it.

How happy were you while using it?
How simple it is to use?

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encoding/decoding issue with python2.5 and pymssql

[Tzury Bar Yochay]

hi,

in my table the field row_id is type of uniqueidentifier.

when try to fetch the data, pymssql somehow, encodes the values in a
way which yields odd results.

for example:
the value
'EE604EE3-4AB0-4EE7-AF4D-018124393CD7'
is represent as
'\xe3N`\xee\xb0J\xe7N\xafM\x01\x81$9<\xd7'

the only way I manged to pass this is by converting the value into
varchar at the server side.
I would like to solve this at the python side and not in the database
for several obvious reasons

see example:

>>> conn = mymssql.connect(**connection_details)
>>> cur = conn.cursor()
>>> sql = "select row_id, cast(row_id as varchar(36)) from table_a"
>>> cur.execute(sql)
>>> rows = cur.fetchall()
>>> rows[0]
('\xe3N`\xee\xb0J\xe7N\xafM\x01\x81$9<\xd7', 'EE604EE3-4AB0-4EE7-
AF4D-018124393CD7')
>>>
>>>
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Re: encoding/decoding issue with python2.5 and pymssql

[Tzury Bar Yochay]

These are not cut&paste but typed by hand, yet they are identical to
the actual output.
seems like the first 8 bytes are swapped while the other half is
straightforward.

I deeply thank you for your assistance.

I am currently using a combination of reversed and list comprehension
to rebuild this byte array.


On Mar 24, 8:48 am, Dennis Lee Bieber <[EMAIL PROTECTED]> wrote:
> On Sun, 23 Mar 2008 22:33:58 -0700 (PDT), Tzury Bar Yochay
> <[EMAIL PROTECTED]> declaimed the following in comp.lang.python:
>
> > for example:
> > the value
> > 'EE604EE3-4AB0-4EE7-AF4D-018124393CD7'
> > is represent as
> > '\xe3N`\xee\xb0J\xe7N\xafM\x01\x81$9<\xd7'
>
>         Are those direct cut&paste?
>
> >>> "".join(["%2.2X" % ord(x) for x in 
> >>> '\xe3N`\xee\xb0J\xe7N\xafM\x01\x81$9<\xd7'])
>
> 'E34E60EEB04AE74EAF4D018124393CD7'
>
> or, putting in -
>
> 'E34E60EE-B04A-E74E-AF4D-018124393CD7'
>
>         The last half is a direct match... the front half looks to have some
> byte-swapping
>
> E34E60EE => (swap shorts)    60EEE34E
> 60EEE34E => (swap bytes)     EE604EE3                
>
> B04A => 4AB0         
>
> E74E => 4EE7         
>
>         Anything 
> onhttp://www.sqljunkies.com/Article/4067A1B1-C31C-4EAF-86C3-80513451FC0...
> of any help (besides the facet of using a GUID to ID the page describing
> GUIDs )
>
> --
>         Wulfraed        Dennis Lee Bieber               KD6MOG
>         [EMAIL PROTECTED]             [EMAIL PROTECTED]
>                 HTTP://wlfraed.home.netcom.com/
>         (Bestiaria Support Staff:               [EMAIL PROTECTED])
>                 HTTP://www.bestiaria.com/

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behavior varied between empty string '' and empty list []

[Tzury Bar Yochay]

while I can invoke methods of empty string '' right in typing
(''.join(), etc.) I can't do the same with empty list

example:

>>> a = [1,2,3]
>>> b = [].extend(a)
>>> b
>>> b = []
>>> b.extend(a)
>>> b
[1,2,3]

I would not use b = a since I don't want changes on 'b' to apply on
'a'

do you think this should be available on lists to invoke method
directly?
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Inheritance question

[Tzury Bar Yochay]

given two classes:

class Foo(object):
def __init__(self):
self.id = 1

def getid(self):
return self.id

class FooSon(Foo):
def __init__(self):
Foo.__init__(self)
self.id = 2

def getid(self):
a = Foo.getid()
b = self.id
return '%d.%d' % (a,b)

While my intention is to get 1.2 I get 2.2
I would like to know what would be the right way to yield the expected
results
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Re: Inheritance question

[Tzury Bar Yochay]

On Mar 25, 2:00 pm, John Machin <[EMAIL PROTECTED]> wrote:
> On Mar 25, 10:44 pm, Tzury Bar Yochay <[EMAIL PROTECTED]> wrote:
>
>
>
> > given two classes:
>
> > class Foo(object):
> >     def __init__(self):
> >         self.id = 1
>
> >     def getid(self):
> >         return self.id
>
> > class FooSon(Foo):
> >     def __init__(self):
> >         Foo.__init__(self)
> >         self.id = 2
>
> >     def getid(self):
> >         a = Foo.getid()
> >         b = self.id
> >         return '%d.%d' % (a,b)
>
> > While my intention is to get 1.2 I get 2.2
> > I would like to know what would be the right way to yield the expected
> > results
>
> Post the code that you actually executed. What you have shown lacks
> the code to execute it ... but the execution will fail anyway:
>
>     a = Foo.getid()
> TypeError: unbound method getid() must be called with Foo instance as
> first argument (got nothing instead)
sorry, it should have been:
a = Foo.getid(self)
instead of
a = Foo.getid()
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Re: Inheritance question

[Tzury Bar Yochay]

> Rather than use Foo.bar(), use this syntax to call methods of the
> super class:
>
> super(ParentClass, self).method()

Hi Jeff,
here is the nw version which cause an error

class Foo(object):
def __init__(self):
self.id = 1

def getid(self):
return self.id

class FooSon(Foo):
def __init__(self):
Foo.__init__(self)
self.id = 2

def getid(self):
a = super(Foo, self).getid()
b = self.id
return '%d.%d' % (a,b)


FooSon().getid()


Traceback (most recent call last):
  File "a.py", line 19, in 
FooSon().getid()
  File "a.py", line 14, in getid
a = super(Foo, self).getid()
AttributeError: 'super' object has no attribute 'getid'
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Re: Inheritance question

[Tzury Bar Yochay]

On Mar 25, 4:03 pm, Anthony <[EMAIL PROTECTED]> wrote:
> On Mar 25, 11:44 am, Tzury Bar Yochay <[EMAIL PROTECTED]> wrote:
>
> > While my intention is to get 1.2 I get 2.2
> > I would like to know what would be the right way to yield the expected
> > results
>
> Is this what you want?
>
> class Foo(object):
>     def __init__(self):
>         self.id = 1
>     def getid(self):
>         return self.id
>
> class FooSon(Foo):
>     def __init__(self):
>         Foo.__init__(self)
>         self.id = 2
>     def getid(self):
>         a = Foo().getid()
>         b = self.id
>         return '%d.%d' % (a,b)
>
> >>> FooSon().getid()
>
> '1.2'
>
> Best wishes,
> Anthony

I wish it was that simple but 'a = Foo().getid()' is actually creating
a new instance of Foo whereas I want the data of the Foo instanced by
__init__ of FooSon().

what I am actually trying to do is to build a set of classes which
handle different type of binary messages coming from the network.

a base message which handles its basic data parts (src, dst, etc.) and
extending it per message type. thus I looked for a way to get the
child calling super for parsing the super's prats and then having the
child parsing its additional details.

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Re: Inheritance question

[Tzury Bar Yochay]

Hi all,

I would like to thank you all for all the suggestions.
what I did was simply extending the super class data with data from
its child

using the id example, Foo.id = 1 is now = [1] and the FooSon does
self.id.append(2)

the system designer wanted inheritance+java and I wanted Python
+Functional Programming
i guess we will meet somewhere in the middle

thanks again
tzury
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Re: Py2exe embed my modules to libary.zip

[Tzury Bar Yochay]

> and then when my application execute code how can I set path to
> d3dx module to "library.zip/d3dx.py".
> I'm not sure is this properly set question.

use the module zipimport
http://docs.python.org/lib/module-zipimport.html
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chronic error with python on mac os/x 10.5

[Tzury Bar Yochay]

Although I am experiencing this problem using a specific domain
library (pjsip). Googling this issue show that it is happening to many
libraries in python on mac.

I was wondering whether anyone solved this or alike in the past and
might share what steps were taken.
Note: this python lib works fine on other platforms (posix, win, and
earlier versions of mac os x)

>>> import py_pjsua
Traceback (most recent call last):
  File "", line 1, in 
ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/2.5/
lib/python2.5/site-packages/py_pjsua.so, 2): Symbol not found:
___CFConstantStringClassReference
  Referenced from: /Library/Frameworks/Python.framework/Versions/2.5/
lib/python2.5/site-packages/py_pjsua.so
  Expected in: dynamic lookup
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os.environ.get('SSH_ORIGINAL_COMMAND') returns None

[Tzury Bar Yochay]

Trying to follow a technique found at bzr I did the following

added to ~/.ssh/authorized_keys the command="my_parder" parameter
which point to a python script file named 'my_parser' and located in /
usr/local/bin  (file was chmoded as 777)

in that script file '/usr/local/bin/my_parser' I got the following
lines:

#!/usr/bin/env python
import os
print os.environ.get('SSH_ORIGINAL_COMMAND', None)

When trying to ssh e.g. 'ssh localhost'
I get None on the terminal and then the connection is closed.

I wonder if anyone have done such or alike in the past and can help me
with this.
Is there anything I should do in my python file in order to get that
environment variable?

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AttributeError: 'module' object has no attribute 'DatagramHandler' (ubuntu-8.10, python 2.5.2)

[Tzury Bar Yochay]

$ ~/devel/ice/snoip/freespeech$ python
Python 2.5.2 (r252:60911, Oct  5 2008, 19:24:49)
[GCC 4.3.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import logging
>>> logging.DatagramHandler
Traceback (most recent call last):
  File "", line 1, in 
AttributeError: 'module' object has no attribute 'DatagramHandler'
>>>


That is odd since the documentation says there is DatagramHandler for
module logging
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why does math.pow yields OverflowError (while python itself can calculate that large number)

[Tzury Bar Yochay]

What is the reason math.pow yields OverflowError while python itself
can
calculate these large numbers. e.g:

>>> import math
>>> math.pow(100, 154)
1e+308
>>> math.pow(100, 155)
Traceback (most recent call last):
  File "", line 1, in 
OverflowError: math range error
>>> eval(('100*'* 155)[:-1])
100
000
000
000
000
L
>>>
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Re: why does math.pow yields OverflowError (while python itself can calculate that large number)

[Tzury Bar Yochay]

> Because math.pow returns a float; 100 ** 155 won't fit in a float.

Sure that is the reason.
May I rephrase, my question:
Why not returning another type as long as we can calculate it?
After all, math module is likely to be used on large numbers as well.
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Re: How to get the time of message Received of an outlook mail in python..

[Tzury Bar Yochay]

On Oct 23, 12:04 pm, "[EMAIL PROTECTED]"
<[EMAIL PROTECTED]> wrote:
> Hi,,
>       How can we access the time of message received ( UTC time) of an
> outlook mail in python? As far as I know the time which it displays in
> the mail is not the exact time... this UTC time will be present in
> MIME Header of an outlook mail.
>
> Any Help is appreciated..and thanks in advance,,
> Venu.

You may google for how to utilize outlook using OLE-COM automation
When finding out how, implement it using python's com wrappers
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a py2exe feature for non-windows environments

[Tzury Bar Yochay]

Hi,

The nicest thing I like about py2exe is its library.zip which
encapsulate all the dependencies into one single file.
I wonder if there a script which can do the same for linux/mac osx so
one can ship a python solution as a single file
(instead of starting easy_install per used library on the target
machine).
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Re: a py2exe feature for non-windows environments

[Tzury Bar Yochay]

> Mac OS X:http://svn.pythonmac.org/py2app/py2app/trunk/doc/index.html

Found these for linux:

http://www.pyinstaller.org/
http://wiki.python.org/moin/Freeze

thanks alot
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how to free memory allocated by a function call via ctypes

[Tzury Bar Yochay]

Hi,

Suppose I have the following function
char *generateMessage(char *sender, char *reciever, char *message) ;

now in c I would normally do

char *msg = generateMessage(sender, reciever, message);
// do something
free(msg);

My question is how do I free the memory allocated when I call this
function using ctypes
I could not find this in the documentation for python 2.5

thanks
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trying to use SOCK_RAW yields error "

[Tzury Bar Yochay]

I am trying to create raw socket:

server = socket.socket(socket.AF_INET, socket.SOCK_RAW,
socket.getprotobyname('ip'))

As a result I get the following error:

Traceback (most recent call last):
  File "tcpsrv.py", line 14, in 
server = socket.socket(socket.AF_INET, socket.SOCK_RAW,
socket.getprotobyname('ip'))
  File "/usr/lib/python2.5/socket.py", line 154, in __init__
_sock = _realsocket(family, type, proto)
socket.error: (93, 'Protocol not supported')


Does anybody have used socket.SOCK_RAW in the past?
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Re: trying to use SOCK_RAW yields error "

[Tzury Bar Yochay]

> When using SOCK_RAW, the family should be AF_PACKET,
> not AF_INET. Note that you need root privileges to do so.

I changed as instructed:
server = socket.socket(socket.AF_PACKET, socket.SOCK_RAW,
socket.getprotobyname('ip'))

now I am getting:

Traceback (most recent call last):
  File "tcpsrv.py", line 15, in 
server.bind((host,port))
  File "", line 1, in bind
socket.error: (19, 'No such device')

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Re: Problem with sqlite

[Tzury Bar Yochay]

after executing insert
do conection.commit()
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Re: Phyton module for Windows Event Viewer?

[Tzury Bar Yochay]

> Can someone point me in the right direction? I'm looking for a module
> to monitor the Windows Event Viewer.

http://docs.python.org/lib/module-logging.html

NTEventLogHandler is the one you should use.

happy pythoning
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Simple UDP server

[Tzury Bar Yochay]

I am looking for the right way to write a small and simple UDP server.

I am wondering between Forking, Threading (found at SocketServer.py)
and the one describes at the snippet below.

Can you tell me the advantages and disadvantages of each
Would the one below will be capable of holding 30 concurrent
connections?

I have no intention of using Twisted or alike since I am looking for
making it as lightweight as possible

Thanks in advance,
Tzury Bar Yochay

# begin of snippet

from socket import *
# Create socket and bind to address
UDPSock = socket(AF_INET,SOCK_DGRAM)
UDPSock.bind(('',50008))

while 1:
data,addr = UDPSock.recvfrom(4*1024)

if not data:
print "No data."
break
else:
print 'from:', addr, ' data:', data
UDPSock.close()
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Re: Simple UDP server

[Tzury Bar Yochay]

On Sep 10, 9:55 pm, Fredrik Lundh <[EMAIL PROTECTED]> wrote:
> Tzury Bar Yochay wrote:
> > Would the one below will be capable of holding 30 concurrent
> > connections?
>
> UDP is a connectionless datagram protocol, so that question doesn't
> really make much sense.
>

So what if it is connectionless.
It would make sense if you get a load of users who sends large sets of
binary data to each other.
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Re: Simple UDP server

[Tzury Bar Yochay]

> Transmitting large binary data over UDP? That makes only sense for few
> applications like video and audio streaming. UDP does neither guarantee
> that your data is received nor it's received in order. For example the
> packages A, B, C, D might be received as A, D, B (no C).
>
> Can your protocol handle missing packages and out of order packages?

I intend of using it for audio transmission and don't care about lose
or out of order.
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writeable buffer and struct.pack_into and struct.unpck_from

[Tzury Bar Yochay]

Hi,

I can't find in the documentation the way to use these two functions.

can someone share a simple code that utilize these two functions?
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Re: writeable buffer and struct.pack_into and struct.unpck_from

[Tzury Bar Yochay]

Thanks Gabriel,
I was missing the information how to create a writable buffer.
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