Re: Set timeout and kill external windows

[gagsl-py2]

At Saturday 16/06/2007 02:24, you wrote:

> Thanks for your reply. I am new to Python and I
cannot
> seem to figure this out. I searched for examples
based
> on your recommendation below but couldn't do it.  I
am
> not familiar with subprocess and
WaitForSingleObject.
> And I want to do this in Windows. Could you please
> write me the few lines I need to do this?

(Please keep posting on the list - other people may
help too, and I don't read this email too often).
Try this. (I had to use a private Popen attribute,
_handle).


import subprocess
from win32event import WaitForSingleObject,
WAIT_TIMEOUT
from win32api import TerminateProcess

def execute_and_wait(args, timeout=None):
"""Execute a command and wait until termination.
If timeout elapses and still not finished, kill
it.
args: list containing program and arguments, or a
single string.
timeout: maximum time to wait, in ms, or None.
"""

p = subprocess.Popen(args)
if timeout:
ret = WaitForSingleObject(p._handle, timeout)
if ret==WAIT_TIMEOUT:
TerminateProcess(p._handle, 1)
return None
return p.wait()

ret = execute_and_wait(["notepad",
"c:\\python\\LICENSE.txt"], 5000)
print "ret=",ret


-- 
Gabriel Genellina






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Re: Can Readlines() go to next line after a Tab

[gagsl-py2]

(Please keep posting on this list)

--- [EMAIL PROTECTED] escribió:

> Thanks, but this method still reads the whole line
> into memory. I would like to find a way for it to
> stop reading when it encounters a \t and then go to
> the next. This would be much faster.

You can't avoid reading the whole line - how can you
detect the end-of-line, unless you use fixed-length
records?

> According to my tests, readlines with a regular
> expression is actually faster than the index method
> you mentioned. Here is the code testing a 25meg file
> with thousands of lines,

Hard to believe, altough that depends on a lot of
factors.
Is the posted code all your testing code? If so, it
doesn't look right.

Write two separate functions, without side effects
each (in this case, that means using a local variable
for kwords). Let's call them f1 and f2, inside kw.py.
Use the timeit module to measure performance instead
of time.time(). Execute both functions *separately* on
two *separate* Python invocations, like this:

python -m timeit -s "from kw import f1,f2" "f1()"
python -m timeit -s "from kw import f1,f2" "f2()"

and see what happens.

-- 
Gabriel Genellina



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Please help in creating Python function in C ++ program

[gagsl-py2]

Forwarded to python-list@python.org

--- "Borse, Ganesh" <[EMAIL PROTECTED]>
escribió:

> Hi,
> 
> I am new to Python. I would like to use Python for
> the specialized purpose of dynamic expressions
> parsing & evaluation in my C++ application.
> I would like to encapsulate the expressions to be
> evaluated in Python function & compile that function
> at runtime, somewhat as below.
>   Expression to eval put in Python function 
>   def isSizeSmall(size,vol,ADV,prod):
> if ( (size < 1000) & (vol < (0.001 * ADV)) &
> (prod=="Stock")): print "OK"; return 10
> else: print "NOK"; return 11
> 
> Then, I want to evaluate the PyObject returned by
> Py_CompileString multiple times in my program using
> the user input as the variables to the above
> function.
> This I tried using two different approaches - 1)
> PyEval_evalCode, & 2) PyObject_CallObject.
> 
> 1) When using PyEval_evalCode: The function call to
> PyEval_evalCode was ok, but it did not return any
> output.
> 2) Whereas, when I used this object with
> PyObject_CallObject, it failed with error as "".
> 
> Any help will be great. Many thanks in advance for
> your help.
> 
> Warm Regards,
> Ganesh
> 
> //***//
> Output of my test program:
> Expression to eval = 
> [def isSizeSmall(size,vol,ADV,prod):
>   if ( (size < 1000) & (vol < (0.001 * ADV)) &
> (prod=="Stock")): print "OK"; return 10
>   else: print "NOK"; return 11
> 
> ]
> str compiled fine with stdin & Py_file_input,
> calling PyEval_EvalCode
> None ok [0] size [-1]
> 
> str compiled fine with stdin & Py_file_input,
> calling PyFunction_New & then PyObject_CallObject
> Getting PyFunction_New
> Calling PyObject_CallObject
> func is callable
> TypeError: ?() takes no arguments (4 given)
> 
> My test program having both above approaches is as
> below:
> main(int argc, char **argv)
> {
>/* Pass argv[0] to the Python interpreter */
>Py_SetProgramName(argv[0]);
>/* Initialize the Python interpreter.  Required.
> */
>Py_Initialize();
>PyRun_SimpleString("import sys\n");
> 
>char szExpr[2048];
>memset(szExpr,'\0',sizeof(szExpr));
>sprintf(szExpr,"def
> isSizeSmall(size,vol,ADV,prod):\n  if ( (size <
> 1000) & (vol < (0.001 * ADV)) & (prod==\"Stock\")):
> print \"OK\"; return 10\n  else: print \"NOK\";
> return 11\n\n\n");
> 
>printf("Expression to eval = \n[%s]\n",szExpr);
> 
>OrderValues ordval;
>ordval.size = 100;
>ordval.ADV  = 10;
>ordval.vol  = 1000;
>memset(ordval.prod,'\0',sizeof(ordval.prod));
>sprintf(ordval.prod,"Stock");
> 
> 
>PyObject *glb, *loc;
> 
>glb = PyDict_New();
>PyDict_SetItemString(glb, "__builtins__",
> PyEval_GetBuiltins());
> 
>loc = PyDict_New();
> 
>PyObject* tuple = PyTuple_New(4);
>PyObject* val = 0;
> 
>val = PyInt_FromLong(ordval.size);
>PyTuple_SetItem(tuple,0,val);
>PyDict_SetItemString(loc,"size",val);
> 
>val = PyInt_FromLong(ordval.vol);
>PyTuple_SetItem(tuple,1,val);
>PyDict_SetItemString(loc,"vol",val);
> 
>val = PyInt_FromLong(ordval.ADV);
>PyTuple_SetItem(tuple,2,val);
>PyDict_SetItemString(loc,"ADV",val);
> 
>val = PyString_FromString(ordval.prod);
>PyTuple_SetItem(tuple,3,val);
>PyDict_SetItemString(loc,"prod",val);
> 
> 
> /*** with string & Py_file_input ***/
>PyObject* result = NULL;
>result = Py_CompileString(szExpr,"",
> Py_file_input);
>if(result!=NULL && !PyErr_Occurred()){
>  printf("str compiled fine with stdin &
> Py_file_input, calling PyEval_EvalCode\n");
> 
>  PyCodeObject *pyCo = (PyCodeObject *)result;
>  PyObject* evalret = NULL;
>  evalret = PyEval_EvalCode(pyCo,glb,loc);
>  if(!evalret || PyErr_Occurred())
>PyErr_Print();
>  else
> printf("ok [%d] size
>
[%d]\n",PyObject_Print(evalret,stdout,0),PyObject_Size(evalret));
> 
>  // Try to get function obj of this...
>  printf("Getting PyFunction_New\n");
>  PyObject* func = PyFunction_New(result,glb);
>  if(!func || PyErr_Occurred()){
>printf("Failed to get Function..\n");
>PyErr_Print();
>  } else {
>  printf("Calling PyObject_CallObject\n");
>  if(PyCallable_Check(func))
>printf("func is callable\n");
>  PyObject* ret = PyObject_CallObject(func,
> tuple);
>  //PyObject* ret = PyObject_CallObject(func,
> NULL);
>  if(!ret || PyErr_Occurred())
>PyErr_Print();
>  else
>printf("PyObject_CallObject
> evaluated..\n");
>  }
>} else {
>  printf("Py_CompileString-1 returned
> NULL\n");
>  PyErr_Print();
>}
>exit(100);
> }

Remember that when you execute the Python source code,
you get the function *definition*; you are not
executing the function itself.

I travel until Dec. so unfortunately I can't provide
more help now. See the docs for Extending and
Embedding.

-- 
Gabriel Genellina

Gabriel Genellina
So

Re: paging in python shell

[gagsl-py2]

--- Alex K <[EMAIL PROTECTED]> escribió:

> Thank you for this interesting tip. However I'm not
> sure to know how
> to use it. It seems pydoc.pager('text') just pages
> the text passed in.
> How do I actually make the python shell use a
> different pager?

I'm unsure of what you want. Do you want the print
statement, inside the Python interpreter, to page its
output? Write a function to page the output the way
you like, and assign it to sys.displayhook (see
http://docs.python.org/lib/module-sys.html#l2h-5124 )

-- 
Gabriel Genellina


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Re: Python UML Metamodel

[gagsl-py2]

--- sccs cscs <[EMAIL PROTECTED]> escribió:
> Gabriel Genellina <[EMAIL PROTECTED]> a écrit :
> En Tue, 29 Jan 2008 21:25:26 -0200, sccs cscs 
> escribió:
> 
> > I find an OPEN SOURCE tool 
> (http://bouml.free.fr/) that Recently  
> > generates Python code from UML model.
> 
> Does it keep the model synchronized when you modify
> the Python code?
> 
> =>No, not for the moment because the Python code
> generator is  brand new, but  the tool's author and
> i are specifying the reverse tool for a next
> version. I do not have found another Open Source
> Tool that generates Python code from UML better like
> that.

Ok, that's important. If the model cannot reflect
changes in the code it becomes less and less useful.

> > I like to model the Python language metamodel
> himself, with it, e.g  the  
> > model of the language: I need that to better
> understand the language  
> > constraint of  the language.
> > [...]
> > -a class  "class" has 0..n attributes and 0..n
> method
> 
> Just attributes. Methods are created on-the-fly when
> the corresponding  
> function attribute is retrieved from the instance.
> And remember that instances are not restricted to
> what their class define.  
> You can add or remove any attribute (even methods!)
> to any instance of a  
> user-defined class at any time. (This doesn't apply
> to most builtin types,  
> but *does* apply if you inherit from it)
> 
> 
> =>You're Right but I will also model that dynamic
> aspect . However i think it is possible and the
> relevant to make a static metamodel of Python, as 
> if there was no possibility of changing dynamic an
> instance.

But Python *is* a dynamic language. You have to
capture that into the model somehow.

> A lot of person  do not understand nothing
> to Python on many aspects, because there is no
> graphical representation of the relation of concepts
> : may a module have  more than on class definition ?
> a mix of class and global fonction? etc... 

A graphical representation may be useful, but it must
be acurate too - else people may incorrectly deduce
that something can't be done because it's not
expressed in the graph.

> > Does anyone know a document that describes it
> already, because I think  
> > it is complicated to find this information in the
> documentation of  
> > Python.
> 
> See section 2 "Data Model" and section 3 "Execution
> Model" in the Python  
> Language Reference http://docs.python.org/ref/
> 
> =>
> Thank you, it's pretty standard but somewhat
> indigestible. However, by studying line by line, I
> would have to be filled into a UML model

Yes, sure, it's hard to follow. As the subtitle says,
it's "for language lawyers" :)

> > - a class "method" can contains nested "method",
> but what is the way to  
> > get a list of internal methods, without use ? Can
> i just write:
> > "myNestedMethodList = method.nestedMethodList"
> 
> Are you talking about nested functions?
> => Yes
> 
> You can't enumerate them from outside the container
> function: Python is a  
> dynamic language, those inner functions are created
> when the def statement  
> is *executed*. If you have an if statement around
> the def, the function  
> may not even exist.
> 
>  => OK, it is diffcult to model: but possible: for
> example, by using a composition (a method may have
> 0..n   inner function). The dynamic aspect may be
> described into a UML note or constraints for example

Anyway it doesn't look right. Inner functions are not
attributes of the enclosing one, like local variables
are not attributes of the enclosing function.

-- 
Gabriel Genellina


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Re: [Help] The pywinauto Can't select the MDI's menu using the MenuItems() which return [].

[gagsl-py2]

--- El vie 19-dic-08, 为爱而生  escribió:

> I use the WORD Only for my example.
> The application I test is similar to the WORD and It
> has't the COM.

The code below opens the Choose Font dialog on my Spanish Windows version:

py> from pywinauto.application import Application
py> app = Application.start("Notepad.exe")
py> app[u"Sin título - Bloc de notas"].MenuSelect(u"Formato->Fuente")

(using an English version, the last line would be 
app.UntitledNotepad.MenuSelect("Format->Font") I presume)

There are many examples in the documentation, and some more info at 
http://pywinauto.seleniumhq.org/

I think there is a pywinauto users list.


> 2008/12/19 Gabriel Genellina 
> 
> > En Thu, 18 Dec 2008 11:28:54 -0200, Simon Brunning
> >  escribió:
> >
> >  2008/12/18 为爱而生 :
> >>
> >>> This problem also use the following
> discription:
> >>> How to use pywinauto to open WORD and select
> its Menu.
> >>> I can't do that and have no idea why!
> >>> Looking forward your help,Thanks!
> >>>
> >>
> >> Word can be automated with COM. My golden rule is
> that automation via
> >> GUI driving is always a last resort.

-- 
Gabriel Genellina


  

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Re: PP3E error

[gagsl-py2]

--- El mar 18-nov-08, ryan <[EMAIL PROTECTED]> escribió:

> I got it to work, just added the PP3E folder to
> Lib\site-packages. thanks very much I have been wanting
> to mke a text editor for some time. I also have another  
> question, what is the book's software licensed under?
> can i make changes to the program and sell the program as my
> own or do I have to give credit to the book and mark lutz?

Excerpt from the book Preface:


Using Code Examples

This book is here to help you get your job done. In general, you may use the 
code in this book in your programs and documentation. You do not need to 
contact us for permission unless you're reproducing a significant portion of 
the code. For example, writing a program that uses several chunks of code from 
this book does not require permission. Selling or distributing a CD-ROM of 
examples from O'Reilly books does require permission. Answering a question by 
citing this book and quoting example code does not require permission. 
Incorporating a significant amount of example code from this book into your 
product's documentation does require permission.

We appreciate, but do not require, attribution. An attribution usually includes 
the title, author, publisher, and ISBN. For example: "Python Programming, Third 
Edition, by Mark Lutz. Copyright 2006 O'Reilly Media, Inc., 978-0-596-00925-0."


So if you use "a significant portion of the code" you are required to ask 
O'Reilly for permission. IANAL, but in my opinion you'll have to do much more 
than "make changes to the program" in order to rightfully consider the final 
product your own creation instead of a derivative work.

-- 
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Re: Help required to read and print lines based on the type of first character

[gagsl-py2]

De: "abhinayaraj.r...@emulex.com" 

> I am sorry to that I am not able to fully grasp it. Could you help me with 
> some more details?
> How can I identify each line and utilize the interactive interpreter?
You really should read the tutorial at http://docs.python.org/tut
(or any other introductory text; see http://wiki.python.org/moin/BeginnersGuide 
for more references)
To open the interpreter, just type "python" (no quotes;  to execute) on 
the command prompt.

-- 
Gabriel Genellina


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Re: pydeflate

[gagsl-py2]

> De: Atrant SG 
> Para: gagsl-...@yahoo.com.ar
> Enviado: domingo 8 de marzo de 2009, 12:23:06
> Asunto: pydeflate

> I've read the topic here 
> http://www.gossamer-threads.com/lists/python/python/678374 and I'd like to
> download pydeflate module, but its official site seems not to be hosted. Do 
> you have pydeflate?
> Could you send it to me? All the search engines always link to the official 
> site and so I cant download
> that module myself =((

No, I don't have pydeflate.
Why do you need it? urllib2 can handle it transparently, and you can even use 
zlib/gzip manually.

-- 
Gabriel Genellina
PS: Please reply to the list.


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Re: import hooks

[gagsl-py2]

--- Patrick Stinson <[EMAIL PROTECTED]>
escribió:

> Right on, that seemed to work, thanks.
> This is different than sys.path_hooks though, which
> requires a callable or
> string subclass?

Yes, it's different, meta_path is a generic mechanism
that doesn't depend on sys.path and is tried before
sys.path is traversed; the other is triggered by a
special sys.path entry (like a .zip file).

> After some experimentation it looks like you can
> disallow an import by
> raising an import error from your meta_path hook. It
> seems a little weird
> that python will then raise a new ImportError from
> import.c:find_module(),
> but I guess the behavior is desirable..

I think you can't make an import fail completely; if
your meta_path doesn't work, the next one is tried,
and then the standard places (where the error is
finally raised).
Looks like the "global name foo not defined" error:
sometimes it's not a global name at all, but that's
where the search finally failed.

-- 
Gabriel Genellina

Gabriel Genellina
Softlab SRL


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Re: What happened with python? messed strings?

[gagsl-py2]

(top posting fixed; please keep discussion on this
list)

--- [EMAIL PROTECTED] escribió:
> In article
>
<[EMAIL PROTECTED]>
> you wrote:
> > En Sun, 20 Apr 2008 15:54:20 -0300,
> <[EMAIL PROTECTED]> escribi?:
> 
> > > I used extensively python and now I find this
> mess with strings,
> > > I can't even reproduce tutorial examples:
> >  "apfel".encode('utf-8')  (it was with umlaut)
> > >   File "", line 0
> > >^
> > > SyntaxError: 'ascii' codec can't decode byte
> 0xc4 in position 1:
> > > ordinal not in range(128)
> > 
> > > Is there any good guide to this mess of codecs
> and hell ?

[two links to unicode introductory articles]

> ok,
> and how do you explain that even the tutorial
> example is broken ???

Which tutorial example?

-- 
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