Re: [Tutor] Capture keyboard input even without python in focus
Hello,On windows OS I'm using the nice pyhook module:"The pyHook library wraps the low-level mouse and keyboard hooks in the Windows Hooking API for use in Python applications. " See tutorial here:http://www.cs.unc.edu/~parente/tech/tr08.shtmlfrancois On 01/04/06, Ars <[EMAIL PROTECTED] > wrote: What commands could capture input from the keyboard (and the mouse while we're at it) even when the running python program isn't the program in focus? Sorta like a keylogger, though that's not my goal (wouldn't be very secret with a python console running anyways lol.) -Jack ___Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] BeautifulSoup - getting cells without new line characters
[EMAIL PROTECTED] wrote:
> Kent Johnson writes:
>
>
>>[EMAIL PROTECTED] wrote:
>>
>>
>>>List of states:
>>>http://en.wikipedia.org/wiki/U.S._state
>>>
>>>: soup = BeautifulSoup(html)
>>>: # Get the second table (list of states).
>>>: table = soup.first('table').findNext('table')
>>>: print table
>>>
>>>...
>>>
>>>WY
>>>Wyo.
>>>Wyoming
>>>Cheyenne
>>>Cheyenne
>src="http://upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Flag_of_Wyomin
>>>g.svg/45px-Flag_of_Wyoming.svg.png" width="45" alt="" height="30"
>>>longdesc="/wiki/Image:Flag_of_Wyoming.svg" />
>>>
>>>
>>>
>>>Of each row (tr), I want to get the cells (td): 1,3,4
>>>(postal,state,capital). But cells 3 and 4 have anchors.
>>
>>So dig into the cells and get the data from the anchor.
>>
>>cells = row('td')
>>cells[0].string
>>cells[2]('a').string
>>cells[3]('a').string
>>
>>Kent
>>
>>___
>>Tutor maillist - Tutor@python.org
>>http://mail.python.org/mailman/listinfo/tutor
>
>
> for row in table('tr'):
>cells = row('td')
>print cells[0]
>
> IndexError: list index out of range
It works for me:
In [1]: from BeautifulSoup import BeautifulSoup as bs
In [2]: soup=bs('''
...: WY
...: Wyo.
...: Wyoming
...: Cheyenne
...: Cheyenne
...: http://upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Flag_of_Wyomin
...: g.svg/45px-Flag_of_Wyoming.svg.png" width="45" alt="" height="30"
...: longdesc="/wiki/Image:Flag_of_Wyoming.svg" />
...:
...: '''
...:
...:
...:
...: )
In [18]: rows=soup('tr')
In [19]: rows
Out[19]:
[
WY
Wyo.
Wyoming
Cheyenne
Cheyenne
http://upload.
g.svg/45px-Flag_of_Wyoming.svg.png" width="45" alt="" height="30"
longdesc="/wiki/Image:Flag_
]
In [21]: cells=rows[0]('td')
In [22]: cells
Out[22]:
[WY,
Wyo.,
Wyoming,
Cheyenne,
Cheyenne,
http://upload
n
g.svg/45px-Flag_of_Wyoming.svg.png" width="45" alt="" height="30"
longdesc="/wiki/Image:Flag_
In [23]: cells[0].string
Out[23]: 'WY'
In [24]: cells[2].a.string
Out[24]: 'Wyoming'
In [25]: cells[3].a.string
Kent
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[Tutor] Python, VB math simple problem
Hi looking for help with what should be a fairly simple Python problem, relating to VB inter-operability. Got a great response from a fellow named Matt at [EMAIL PROTECTED], pointed me in some good directions - some areas, concerns still foggy on, the below thread is included any feedback on this simple dilemma would be very appreciated. Thanks, D thread follows below; To: [EMAIL PROTECTED] Subject: Problem with Python math functions and VB Date: 3/30/2006 9:39:28 PM Download Message Display Headers Printer Friendly Previous | Next Wondering if you might either know how to solve the following. I've a background in Visual Basic, and am using an old version, 4.0, it compiles to a smaller executable which I prefer. I find myself in an odd situation, needing a very simple yet powerful capability of Python for a VB app Im working on. Simply, a large 300 digit number is divided by a smaller number ranging from 1 to 3 digits. I.e; This large 300 digit number is generated as a string from the VB app, and I want to input this somehow from the VB app directly to Python for simple math operations. Where; x = 300 digit number, y = divisor ( say '37') x / 37 I want to divide x by y but I want the remainder of this division to at least 3 or 4 decimal places, so my Python script at the command line; x %y /y. = z So now I want to take the resultant, the full number plus its remainder, and I want to round this number up to the next highest number and divide it by the same constant; z rounded up to next highest number (never the lowest) so z /y = z Long Remove the 'L' at the end, round up the last digit of z = Z Then; Z %y /y. = a Then I want the last five digits of z (not Z) and a truncated at the end, so the last digit before the decimal point and the four digits past the decimal point printed to a text file. I want to be able to open the text file with the VB app and use this data as inputs. == Ok, so here is my dilemma, I know VERY litle about Python and a fair bit about VB. Ideally, I'd love to be able to simply have some extremely small executable that just accepts inputs does the calculations above and then spits out the outputs. If it were possible to write some simple lines of math code in Python and then compile these scripts in Python to a Windows compatible executable,that would be fantastic. If I could simply have my VB app, 'call' the name of the tiny Python executable, and then the Python executable just automatically looked for a named text file (created by the VB app) and extracted the 300 digit number from this, then performed the calcs, then spit this data out as a new text file name it created, which I could then use the VB app to open and read from, THAT would be ideal. However, I don't know if Python can compile scripts to an exe? If it can how could I find out how to do this? If it doesn't, how could I get VB to directly pass commands to the Python command line and then automatically extract the outputs? Shelling out from VB to Python would be tough to the command line I think, since the Python command line uses the 'Edit / Mark, Paste' approach to inserting, copy inputs, outputs and this would be virtually untenable, as far as I can tell to automate in a VB shell out routine. So basically, how the heck can I access Pythons ability to perform simple calculations on very large numbers, easily, from within VB 4.0 ? There must be a way, it seems like such a simple think to do, especially since the actual math operations are so simple, straight forward, and would never change. Any ideas? -- Matthew, thanks for your response. <-Original Message-> >From: Matthew Dixon Cowles >Sent: 3/31/2006 9:41:18 AM >To: [EMAIL PROTECTED] >Cc: [EMAIL PROTECTED] >Subject: Re: [Python-Help] Problem with Python math functions and VB >I'm sure that there's a way to do that, but I'm not familiar with >Visual Basic and I don't know what inter-process communication >facilities it offers. Is there a person or group you might direct me to that has worked with this inter-process communication between VB and Python? >I don't think that Python is going to be able to do that for you out >of the box. Hundreds of digits of floating-point precision is a lot. Could you explain that a bit more, sorry Im not sure what you mean by 'out of the box' ? If I run the Python command line screen in windows and manually type out a very large number, say 180 digits; where 'X' = very large number; X %37 /37. returns what Im after, value wise. but of course I don't want to do this manually each time for every dividend. >You might find that one of the Python modules that let you use an >extended-precision library would do what you want. GMPY is one: >http://gmpy.sourceforge.net/
Re: [Tutor] BeautifulSoup - getting cells without new line characters
Kent Johnson writes:
> [EMAIL PROTECTED] wrote:
>> Kent Johnson writes:
>>
>>
>>>[EMAIL PROTECTED] wrote:
>>>
>>>
List of states:
http://en.wikipedia.org/wiki/U.S._state
: soup = BeautifulSoup(html)
: # Get the second table (list of states).
: table = soup.first('table').findNext('table')
: print table
...
WY
Wyo.
Wyoming
Cheyenne
Cheyenne
>>>src="http://upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Flag_of_Wyomin
g.svg/45px-Flag_of_Wyoming.svg.png" width="45" alt="" height="30"
longdesc="/wiki/Image:Flag_of_Wyoming.svg" />
Of each row (tr), I want to get the cells (td): 1,3,4
(postal,state,capital). But cells 3 and 4 have anchors.
>>>
>>>So dig into the cells and get the data from the anchor.
>>>
>>>cells = row('td')
>>>cells[0].string
>>>cells[2]('a').string
>>>cells[3]('a').string
>>>
>>>Kent
>>>
>>>___
>>>Tutor maillist - Tutor@python.org
>>>http://mail.python.org/mailman/listinfo/tutor
>>
>>
>> for row in table('tr'):
>>cells = row('td')
>>print cells[0]
>>
>> IndexError: list index out of range
>
> It works for me:
>
>
> In [1]: from BeautifulSoup import BeautifulSoup as bs
>
> In [2]: soup=bs('''
> ...: WY
> ...: Wyo.
> ...: Wyoming
> ...: Cheyenne
> ...: Cheyenne
> ...: title=""> ...:
> src="http://upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Flag_of_Wyomin
> ...: g.svg/45px-Flag_of_Wyoming.svg.png" width="45" alt="" height="30"
> ...: longdesc="/wiki/Image:Flag_of_Wyoming.svg" />
> ...:
> ...: '''
> ...:
> ...:
> ...:
> ...: )
>
> In [18]: rows=soup('tr')
>
> In [19]: rows
> Out[19]:
> [
> WY
> Wyo.
> Wyoming
> Cheyenne
> Cheyenne
> title="">http://upload.
>
> g.svg/45px-Flag_of_Wyoming.svg.png" width="45" alt="" height="30"
> longdesc="/wiki/Image:Flag_
> ]
>
> In [21]: cells=rows[0]('td')
>
> In [22]: cells
> Out[22]:
> [WY,
> Wyo.,
> Wyoming,
> Cheyenne,
> Cheyenne,
>title="">http://upload
> n
> g.svg/45px-Flag_of_Wyoming.svg.png" width="45" alt="" height="30"
> longdesc="/wiki/Image:Flag_
>
> In [23]: cells[0].string
> Out[23]: 'WY'
>
> In [24]: cells[2].a.string
> Out[24]: 'Wyoming'
>
> In [25]: cells[3].a.string
>
>
> Kent
>
> ___
> Tutor maillist - Tutor@python.org
> http://mail.python.org/mailman/listinfo/tutor
Yes, ok. But so, it is only possible get data from a row (rows[0])
cells=rows[0]('td')
And I want get data from all rows. I have trying with several 'for' setences
but i can not.
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Re: [Tutor] BeautifulSoup - getting cells without new line characters
[EMAIL PROTECTED] wrote:
> Yes, ok. But so, it is only possible get data from a row (rows[0])
>
> cells=rows[0]('td')
>
> And I want get data from all rows. I have trying with several 'for' setences
> but i can not.
Can you show us what you tried?
Have you read a Python tutorial? It seems like some of the things you
are struggling with might be addressed in general Python material.
Kent
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Re: [Tutor] Python, VB math simple problem
Mr X wrote: > > > Hi looking for help with what should be a fairly simple Python problem, > relating to VB inter-operability. > Got a great response from a fellow named Matt at [EMAIL PROTECTED], > pointed me in some good directions - some areas, concerns still foggy > on, the below thread is included any feedback on this simple dilemma > would be very appreciated. You can use py2exe to make an executable from a python program. Or the VB program could invoke a command line like "python prog.py data.txt" without needing to use py2exe. You can also write COM servers in Python. Kent > > Thanks, > > D > > thread follows below; > > > > To: [EMAIL PROTECTED] > Subject: Problem with Python math functions and VB > Date: 3/30/2006 9:39:28 PM > Download Message Display Headers Printer Friendly > Previous | Next > > Wondering if you might either know how to solve the following. > > I've a background in Visual Basic, and am using an old version, 4.0, it > compiles to a smaller executable which I prefer. I find myself in an odd > situation, needing a very simple yet powerful capability of Python for a > VB app > Im working on. > > Simply, a large 300 digit number is divided by a smaller number ranging > from 1 to 3 digits. I.e; > > This large 300 digit number is generated as a string from the VB app, > and I want to input this somehow > from the VB app directly to Python for simple math operations. > > Where; x = 300 digit number, y = divisor ( say '37') > > > x / 37 > > I want to divide x by y but I want the remainder of this division to at > least 3 or 4 decimal places, so my Python script at the command line; > > x %y /y. = z > > So now I want to take the resultant, the full number plus its remainder, > and I want to round this number up > to the next highest number and divide it by the same constant; > > z rounded up to next highest number (never the lowest) > > so > > z /y = z Long > > Remove the 'L' at the end, round up the last digit of z = Z > > Then; > > Z %y /y. = a > > Then I want the last five digits of z (not Z) and a truncated at the > end, so the last digit before > the decimal point and the four digits past the decimal point printed to > a text file. > > I want to be able to open the text file with the VB app and use this > data as inputs. > == > > Ok, so here is my dilemma, I know VERY litle about Python and a fair bit > about VB. > > Ideally, I'd love to be able to simply have some extremely small > executable that just accepts inputs > does the calculations above and then spits out the outputs. If it were > possible to write some > simple lines of math code in Python and then compile these scripts in > Python to a Windows > compatible executable,that would be fantastic. > > If I could simply have my VB app, 'call' the name of the tiny Python > executable, and then the Python executable > just automatically looked for a named text file (created by the VB app) > and extracted the 300 digit number from this, then performed the calcs, > then spit this data out as a new text file name it created, which I > could then use the VB app to open and read from, THAT would be ideal. > > However, I don't know if Python can compile scripts to an exe? If it can > how could I find out how to do this? > > If it doesn't, how could I get VB to directly pass commands to the > Python command line and then automatically > extract the outputs? Shelling out from VB to Python would be tough to > the command line I think, since the Python command line uses the 'Edit / > Mark, Paste' approach to inserting, copy inputs, outputs and this would > be virtually untenable, as far as I can tell to automate in a VB shell > out routine. > > So basically, how the heck can I access Pythons ability to perform > simple calculations on very large numbers, easily, from within VB 4.0 ? > There must be a way, it seems like such a simple think to do, especially > since the actual math operations are so simple, straight forward, and > would never change. > > Any ideas? > > > > -- > Matthew, thanks for your response. > > <-Original Message-> > >From: Matthew Dixon Cowles > >Sent: 3/31/2006 9:41:18 AM > >To: [EMAIL PROTECTED] > >Cc: [EMAIL PROTECTED] > >Subject: Re: [Python-Help] Problem with Python math functions and VB > > >I'm sure that there's a way to do that, but I'm not familiar with > >Visual Basic and I don't know what inter-process communication > >facilities it offers. > > Is there a person or group you might direct me to that has worked with this > inter-process communication between VB and Python? > > >I don't think that Python is going to be able to do that for you out > >of the box. Hundreds of digits of floating-point precision is a lot. > > Could you explain that a bit more, sorry Im not sure what you mean > by 'out of the box' ? If I run the Python command line screen in windows > a
Re: [Tutor] i need help please read (fwd)
Tom, I'm still struggling, but based on what Danny Yoo deduced I'll assume you are talking anbout a dialog box or window of some sort rather than drawing a graphical box? > ok ill tell you want im doing i want to make a box using python that if > you > put the box over a number on the computer screen it pops up inside the box Do you mean a bit like the magnifier applet that ships with Windows? It magnifies whatever is underneath it on the main screen? If so thats a really tough task. It is possible in Python but it requires an in-depth knowledge of how Windows works - much more than I have! > and the number can be altered in the box and however you alter it on the > box > it turns into that or show what you altered in place of the number you put > it over get what im saying And modifying the number underneath is much much harder again. It might not even be possible! You can alter it in your own program but to make that take effect on the underlying application would require that you find out what application was diswplaying the number and then find a way to write to that application. These are very deep and difficult programming tasks! Its theoretically possible in Python, but its very difficult. Even in C++ it would be a real challenge. Alan G. Just back from a week's vacation in Spain. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] BeautifulSoup - getting cells without new line characters
Kent Johnson writes:
> [EMAIL PROTECTED] wrote:
>> Yes, ok. But so, it is only possible get data from a row (rows[0])
>>
>> cells=rows[0]('td')
>>
>> And I want get data from all rows. I have trying with several 'for' setences
>> but i can not.
>
> Can you show us what you tried?
>
> Have you read a Python tutorial? It seems like some of the things you
> are struggling with might be addressed in general Python material.
>
> Kent
>
> ___
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> http://mail.python.org/mailman/listinfo/tutor
You consider a thing about me.
If I ask something it is because I cannot find the solution. I do not it by
whim.
Yes, I have read tutorials about python, and I have looked for this problem
in this mail list using a web searcher as alltheweb, and I have even looked
for in the google groups about python.
* for rows in table('tr'): print rows('td')
it fails when i'm going to get data of each cell using:
for rows in table('tr'): print rows('td')[0]
* for rows in table('tr'):
for cell in rows('td'):
print cell
The same, using print cell[0]
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[Tutor] Doctest, object references and the use of ellipses
Hi: I am trying to use Doctest and am having trouble using the ellipsis feature when trying to match an object reference. Here is the code: def add_change_listener(self, listener): ''' Returns list of listeners just for testing. >>> def mock_listener(): ...pass >>> model = Model() >>> model.add_change_listener(mock_listener) #doctest: +ELLIPSIS [] ''' self.listeners.append(listener) return self.listeners This is what I get back: Trying: model.add_change_listener(mock_listener) #doctest: +ELLIPSIS Expecting: [] ** File "D:\ProgrammingProjects\MVCExperiments\src\mvcmodel.py", line 14, in __main__.Model.add_change_listener Failed example: model.add_change_listener(mock_listener) #doctest: +ELLIPSIS Expected: [] Got: [] As far as I can tell from the Doctest documentation this test should have passed. Any help on what I am doing wrong would be much appreciated. Thanks, Don. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Doctest, object references and the use of ellipses
Don Taylor wrote: > Hi: > > I am trying to use Doctest and am having trouble using the ellipsis > feature when trying to match an object reference. What version of Python are you using? The ELLIPSIS comment was added in Python 2.4. Kent > > Here is the code: > > def add_change_listener(self, listener): > ''' > > Returns list of listeners just for testing. > >>> def mock_listener(): > ...pass > >>> model = Model() > >>> model.add_change_listener(mock_listener) #doctest: +ELLIPSIS > [] > > ''' > > self.listeners.append(listener) > return self.listeners > > This is what I get back: > > Trying: > model.add_change_listener(mock_listener) #doctest: +ELLIPSIS > Expecting: > [] > ** > File "D:\ProgrammingProjects\MVCExperiments\src\mvcmodel.py", line 14, > in __main__.Model.add_change_listener > Failed example: > model.add_change_listener(mock_listener) #doctest: +ELLIPSIS > Expected: > [] > Got: > [] > > As far as I can tell from the Doctest documentation this test should > have passed. > > Any help on what I am doing wrong would be much appreciated. > > Thanks, > > Don. > > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > > ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Python tutor
"Noufal Ibrahim" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Greetings all, Greetings, > the reader learns stuff). Another example that comes to mind is the > tcltutor program to learn TCL. It contains an instruction window, a > code window and an output window. The user is told something, they try > it and the output is visible. I personally used it when I was learning > TCL. The tcltutor is fabulous and I've often toyed with the idea of trying to build a Pythonic version. I particularly like the way you can toggle from newbie view to expert view and get the same feature described in friendly English prose through to the bare man pages. > The python tutorial is great and probably all one needs to learn the > language but I think a more interactive program to teach it might be I tried at one stage producing JavaScripted versions of the code in my tutor where you could step through the code with the active line being highlighted in colour - like a debugger. But after struggling for ages to get one short example to work it seemed too much like hard work! > Do you all think it'll be a worthwhile project? I think it would be a great project. The other one in similar vein is to do a demo program of the Tkinter (and the Tix widgets too) similar to the Tcl/Tk demo program. Again I've had it on my list of 'things to do' for several years now! Alan G. (Back from a weeks vacation in sunny Spain! :-) ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] BeautifulSoup - getting cells without new line characters
> > Have you read a Python tutorial? It seems like some of the things you
> > are struggling with might be addressed in general Python material.
>
>
> You consider a thing about me. If I ask something it is because I cannot
> find the solution. I do not it by whim.
Hello Jonas,
Yes, but don't take Kent's question as a personal insult --- he's asking
because it looks like you're having trouble interpreting error messages or
considering border cases.
If you're doing HTML parsing, there's an unspoken assumption that you've
already mastered basic programming. After reading the questions you're
asking, I agree with Kent; you're struggling with things that you should
have already covered in tutorials.
Out of curiosity, what tutorials have you looked at? Give us links, and
we'll take a look and evaluate them for accuracy. Some Python tutorials
are good, but some of them out there are quite bad too. The ones linked
from:
http://wiki.python.org/moin/BeginnersGuide/NonProgrammers
and:
http://wiki.python.org/moin/BeginnersGuide/Programmers
should be ok.
> * for rows in table('tr'): print rows('td')
>
> it fails when i'm going to get data of each cell using:
>
> for rows in table('tr'): print rows('td')[0]
Just to clarify: when you say it "fails", please try to be more specific.
What exactly does Python report as the error?
I see that you mention the error message here:
http://mail.python.org/pipermail/tutor/2006-March/046103.html
But are you looking at the error message and trying to understand what
it's saying? It says that the cell doesn't have a zeroth element. And
this is probably true! I wouldn't disbelieve the computer on this one.
*grin*
TD elements probably won't have nested sub-elements. But they may have
a 'string' attribute, though, which is what Kent's example used to pull
the text out of the TD.
But your reply to his message doesn't look like it even responds to Kent's
example. It is unclear to us why you're not reading or understanding his
example, and just going off and doing something else. If you don't
understand a reply, try asking a question about it: we'll be happy to
elaborate. Try not to go off so quickly and ignore responses: it gives
the impression that you don't care enough to read through things.
Anyway, the program snippet above makes assumptions, so let's get those
out of the way. Concretely:
for rows in table('tr'):
print rows('td')[0]
makes an assumption that is not necessarely true:
* It assumes that each row has a td element.
Do you understand the border case here? In particular:
* What if you hit a TR table row that does not have any TD columns?
>From viewing the wiki web page you gave as an example, I can see several
TR's in the page's content that do not have TD's, but only TH's. I'm not
certain what BeautifulSoup will do in this situtation --- I suspect that
it'll return None --- but in any case, your code has to account for this
possibility.
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Re: [Tutor] request for sugestions on fragement of code for generating truth-tables
Brian van den Broek wrote: >Hi all, > >I've been too busy with life to do much Python of late. So, I am a bit >rusty. :-( > >I've got some code that does what it needs to but I think I might be >overlooking a much smoother way to get what I need. > >The code takes a list of strings and returns a list of dictionaries, >where each dictionary uses the strings from the list as keys and >booleans as values. The dictionary list contains a dictionary >exhibiting each possible combination of booleans over the keys, where >these combinations are listed in a systematic way. > >This code works: > >def tva_dict_maker(atoms): > > tvas = [] > val = False > > for k in range(2**len(atoms)): > tvas.append(dict()) > > for i in range(len(atoms)): > key = atoms[i] > > for j in range(2**len(atoms)): > if j % ( len(tvas) / 2.0 ** (i+1) ) == 0: > val = not val > tvas[j][key]=val > > return tvas > >The output I desire is easier to see with a bit of processing (to >impose order on the dicts). So, > >def display_tvas(tvas): > for i in tvas: > for j in sorted(i): > print "%s:%s\t" %(j, i[j]), > print > >Then, the output is like so: > > >>> atoms = ["a","b","c"] > >>> tvas = tva_dict_maker(atoms) > >>> display_tvas(tvas) >a:True b:True c:True >a:True b:True c:False >a:True b:False c:True >a:True b:False c:False >a:Falseb:True c:True >a:Falseb:True c:False >a:Falseb:False c:True >a:Falseb:False c:False > >>> > >As desired :-) > >But, I can't shake the feeling I'm doing this in a harder than >necessary way :-| > >[This is in the context of writing a program to generate truth-tables >for sentential logic, so that I can easily create answered exercises >for a critical thinking course I've been teaching. (As it is for a >Philosophy class, the truth-values are listed in the opposite order >than in a CompSci context.)] > >Any suggestions would be welcome. > >Best to all, > >Brian vdB >___ >Tutor maillist - Tutor@python.org >http://mail.python.org/mailman/listinfo/tutor > > > What this shouts immediately to me, at least, is binary numbers and bool(). Just use your favorite binary conversion recipe, and count down from int(len(atoms)*"1",2), converting as you go. And then you take the boolean value of each digit of the binary number. If you need help, let me know as I've completed a working model. HTH, Orri -- Email: singingxduck AT gmail DOT com AIM: singingxduck Programming Python for the fun of it. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Doctest, object references and the use of ellipses
Kent Johnson wrote: > Don Taylor wrote: > >>Hi: >> >>I am trying to use Doctest and am having trouble using the ellipsis >>feature when trying to match an object reference. > > > What version of Python are you using? The ELLIPSIS comment was added in > Python 2.4. > I am using 2.4.2 Don. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Apple Remote "Mouse"
"Johnston Jiaa" <[EMAIL PROTECTED]> wrote in message > I recently bought a Macbook Pro from Apple. I'm jealous already... > As it comes with a remote, I thought it would be great to use it as > a mouse when not in Front Row. ... > Is there any way to manipulate the cursor position on the screen using > Python? This is really about programming Cocoa more than it is about Python. You need to look at how you would do this in Objective C first then translate that to Python using the Cocoa wrappers for MacPython. It should all be feasible but I'd start looking on the Apple development sites first - have you checked the fantastic programmer's pages on the Apple site at: http://developer.apple.com/ If you haven't already done so sogn up to the developers email list. Not only do you get advance news of developments in Apple land but they post new articles and how-tos every week or so. Also worth keeping an eye on is O'Reilly's MacDevCenter http://www.macdevcenter.com/ And finally Stepwise's Vermont recipes are great: http://www.stepwise.com/ Look in particular at the starting Cocoa and Articles links. For your purpose you will need to create mouse events and then post them to the applications event queue using the postEvent method. There are several factory methods available for creating events. Warning: This is not a trivial task and will involve some fairly deep reading about the Apple event model and the mouse event definitions in particular. But it is doable. HTH, -- Alan G Author of the learn to program web tutor http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Python tutor
Noufal Ibrahim wrote: > Greetings all, >Are there any programs for python that offer an "interactive" tutorial? > Something on the lines of the builtin emacs tutorial (which is While it is not really what you had in mind, I have just discovered the Python Challenge - and it is a lot of fun. http://www.pythonchallenge.com/ Don. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how to get the content of an XML elements.
"Keo Sophon" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Is there anyway to get the content of an XML elements. I am using xml.dom. For true XML I think ElemTree (by Fred Lundh?) is the best approach. Try a Google search. Kent uses it as I recall. Alan G. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how to get the content of an XML elements.
Alan Gauld wrote: > "Keo Sophon" <[EMAIL PROTECTED]> wrote in message > news:[EMAIL PROTECTED] > > >>Is there anyway to get the content of an XML elements. I am using xml.dom. > > > For true XML I think ElemTree (by Fred Lundh?) is the best approach. > Try a Google search. Yes, it's ElementTree though. Keo, what do you mean, "get the content of an XML elements"? Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Python tutor
Alan Gauld wrote: > > I tried at one stage producing JavaScripted versions of the code in my > tutor where you could step through the code with the active line being > highlighted in colour - like a debugger. But after struggling for ages to > get > one short example to work it seemed too much like hard work! > I found this site the other day and I thought that it would not be too difficult to generalize this technique into a simple tool for authoring tutorials. http://www.jorendorff.com/toys/ Don. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] BeautifulSoup - getting cells without new line characters
Danny Yoo writes:
>
>
>> > Have you read a Python tutorial? It seems like some of the things you
>> > are struggling with might be addressed in general Python material.
>>
>>
>> You consider a thing about me. If I ask something it is because I cannot
>> find the solution. I do not it by whim.
>
> Hello Jonas,
>
> Yes, but don't take Kent's question as a personal insult --- he's asking
> because it looks like you're having trouble interpreting error messages or
> considering border cases.
>
Sorry Kent if my answer was very rude. I very was tired to try many things
without no good result.
> Anyway, the program snippet above makes assumptions, so let's get those
> out of the way. Concretely:
>
> for rows in table('tr'):
> print rows('td')[0]
>
> makes an assumption that is not necessarely true:
>
> * It assumes that each row has a td element.
>
> Do you understand the border case here? In particular:
>
> * What if you hit a TR table row that does not have any TD columns?
>
Danny, you give me the idea. The problem is that the first row has TH
columns (not TD). So:
for row in table('tr'):
if row('td'):
print row('td')[0].string
___
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Re: [Tutor] BeautifulSoup - getting cells without new line characters
And the solution to get the state and capital columns (where there are
anchors):
for row in table('tr'):
for cell in row.fetch('a')[0:2]:
print cell.string
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Re: [Tutor] Python tutor
>> I tried at one stage producing JavaScripted versions of the code in my > > I found this site the other day and I thought that it would not be too > difficult to generalize this technique into a simple tool for authoring > tutorials. > > http://www.jorendorff.com/toys/ Yes, this is similar to something else I tried which was a collapsing editor style presentation where you could collapse or expand functions. The problem was that I found it difficult to get a version that worked properly on all browsers and the amount of code to get it universal was too much for me to tolerate in a web page! (I'm a minimalist when it comes to HTML!) Alan G Author of the learn to program web tutor http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Doctest, object references and the use of ellipses
[Don Taylor] > I am trying to use Doctest and am having trouble using the ellipsis > feature when trying to match an object reference. > > Here is the code: > > def add_change_listener(self, listener): > ''' > > Returns list of listeners just for testing. > >>> def mock_listener(): > ...pass > >>> model = Model() > >>> model.add_change_listener(mock_listener) #doctest: +ELLIPSIS > [] > > ''' > > self.listeners.append(listener) > return self.listeners > > This is what I get back: > > Trying: > model.add_change_listener(mock_listener) #doctest: +ELLIPSIS > Expecting: > [] > ** > File "D:\ProgrammingProjects\MVCExperiments\src\mvcmodel.py", line 14, > in __main__.Model.add_change_listener > Failed example: > model.add_change_listener(mock_listener) #doctest: +ELLIPSIS > Expected: > [] > Got: > [] That "should work", provided there aren't differences in whitespace that are invisible to us in this medium. For example, if, in your source file, there's actually a (one or more) trailing space on your line of expected output, then it would _not_ match the actual output. Try adding +REPORT_NDIFF to your #doctest options; that will point out all differences (including whitespace). ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Apple Remote "Mouse"
Hey Alan,I'm fairly new to programming and this is my first Apple computer. It arrives on Monday, I've been waiting for ages. Amazon took forever shipping it out. Anyway, this will ultimately be a true learning experience -- I'll tell you how it turns out! Many thanks for giving me these pointers, I'll check out all the sites and be immersed in all these Apple pages the next couple of weeks or so.Johnston Jiaa ([EMAIL PROTECTED]) Blab-away for as little as 1¢/min. Make PC-to-Phone Calls using Yahoo! Messenger with Voice.___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Doctest, object references and the use of ellipses
Tim Peters wrote: > That "should work", provided there aren't differences in whitespace > that are invisible to us in this medium. For example, if, in your > source file, there's actually a (one or more) trailing space on your > line of expected output, then it would _not_ match the actual output. > Try adding +REPORT_NDIFF to your #doctest options; that will point out > all differences (including whitespace). Oh, thank you! Yes, there was a trailing whitespace. And yes I did read the manual that warned about this but I guess it did not register deep enough into my reptile brain (you know, the Python brain). I will try not to do this again (and I probably won't). Don. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Doctest, object references and the use of ellipses
[Tim Peters] >> That "should work", provided there aren't differences in whitespace >> that are invisible to us in this medium. For example, if, in your >> source file, there's actually a (one or more) trailing space on your >> line of expected output, then it would _not_ match the actual output. >> Try adding +REPORT_NDIFF to your #doctest options; that will point out >> all differences (including whitespace). [Don Taylor] > Oh, thank you! Cool -- glad it worked! > Yes, there was a trailing whitespace. And yes I did read the manual > that warned about this but I guess it did not register deep enough into > my reptile brain (you know, the Python brain). > > I will try not to do this again (and I probably won't). I'll share a secret :-) I work on Python development, and a few times per week I run this from the root of a Python checkout (this is on Windows, BTW): python \Python24\Tools\Scripts\reindent.py -r . reindent.py is in your distribution too. It ensures (by rewriting files as needed) that all .py files reachable from "." conform to core Python's whitespace standards, which includes things like 4-space indentation, no hard tab characters, and no trailing whitespace on any lines. All the .py files in a distribution are automatically kept free of "whitespace surprises" this way. You're allowed to run that on your code too ;-) ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] BeautifulSoup - getting cells without new line characters
> And the solution to get the state and capital columns (where there are
> anchors):
>
> for row in table('tr'):
>for cell in row.fetch('a')[0:2]:
>print cell.string
Hi Jonas,
That's good to hear! So does everything work for you then?
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