Re: [Tutor] How to have the name of a function inside the code of this function?
Le 07/04/2012 04:01, Dave Angel a écrit :
On 04/06/2012 03:19 PM, Karim wrote:
Le 06/04/2012 19:31, Alan Gauld a écrit :
On 06/04/12 09:47, Karim wrote:
If you have any idea to get the caller name inside the caller.
Its not normally very helpful since in Python the same function can
have many names:
def F(x):
return x*x
a = F
b = F
c - lambda y: F(y)
print F(1), a(2), b(3), c(4)
Now, why would knowing whether the caller used F,a or b
to call the same function object help? And what do you
do in the case of c()? Do you return 'c' or 'F'?
Maybe you could use it to tell you the context from
which they were calling? But in that case there are
usually better, more reliable, techniques
- like examining the stackframe.
HTH,
Thanks Steven, Moduok and Steven for all your answers!
The reason is simple I wanted to optimize some code using pyuno for
openoffice.org doc generation I have several methods to set
text with "Heading 1", ... "Heading" title style:
def title(self, text='', style="Heading 1"):
self._cursor_text.setPropertyValue('ParaStyleName', style)
self.add_text(text)
def title1(self, text=''):
self.title(text=text)
def title2(self, text=''):
self.title(text='', style="Heading 2")
...
def title9(self, text=''):
self.title(text='', style="Heading 9")
-
I just wanted to improve a little by doing something like that (pseudo
code):
def title9(self, text=''):
self.title(text='', style="Heading " +.split()[1])
In short the number in the funtion name is the number of the title
depth in the document.
There is no big deal if Iit's not feasible;
Cheers
Karim
Those are methods, not functions. So if you have a bunch of methods,
differing only in the numeric suffix their names have, and one of the
parameters to a method they each call, there's probably a simpler way.
First, you could create function objects (using approaches like
partial), turn them into methods, and attach them to a class with
generated names (somebody else will have to help you do it; I just am
pretty sure it's possible)
Second, ifyou can control the code which will be calling these methods,
you could just have that code parameterize things a little differently.
For example, instead of calling
obj.title9("my text")
it might call
obj.title(9, "my text")
where title() is a pretty simple, single method.
Thanks Dave,
In fact at first I did that:
obj.title(text='my text', heading=9)
But I wanted something more flashing to recognize and more simple to
write because I've got a lot of call in my 1000 pages document creation.
I will take a look at partial.
Cheers
PS: By the I thanked Steven twice this one an mistake sorry and thank
you Alan!
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Re: [Tutor] Tkinter GUI crashing problem
myles broomes wrote: Im working the Tkinter and I'm having a problem with the GUI I made. It crashes whenever I hit the submit button. Heres my code: Define "crashes". Does it: * cause your computer to Blue Screen of Death? * lock up your computer until you Ctrl-Alt-Delete? * cause Windows to put up an error message saying the application has crashed and would you like to submit diagnostics to Microsoft? * print a standard Python traceback? * something else? If you get a traceback, please COPY AND PASTE the entire traceback into an email and send that. Do not retype it by hand, summarise, simplify or otherwise reword it. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How to have the name of a function inside the code of this function?
On 04/06/2012 03:19 PM, Karim wrote:
> Le 06/04/2012 19:31, Alan Gauld a écrit :
>> On 06/04/12 09:47, Karim wrote:
>>
>>> If you have any idea to get the caller name inside the caller.
>>
>>
>> Its not normally very helpful since in Python the same function can
>> have many names:
>>
>> def F(x):
>>return x*x
>>
>> a = F
>> b = F
>> c - lambda y: F(y)
>>
>> print F(1), a(2), b(3), c(4)
>>
>> Now, why would knowing whether the caller used F,a or b
>> to call the same function object help? And what do you
>> do in the case of c()? Do you return 'c' or 'F'?
>>
>> Maybe you could use it to tell you the context from
>> which they were calling? But in that case there are
>> usually better, more reliable, techniques
>> - like examining the stackframe.
>>
>> HTH,
>
> Thanks Steven, Moduok and Steven for all your answers!
>
> The reason is simple I wanted to optimize some code using pyuno for
> openoffice.org doc generation I have several methods to set
> text with "Heading 1", ... "Heading " title style:
>
> def title(self, text='', style="Heading 1"):
> self._cursor_text.setPropertyValue('ParaStyleName', style)
> self.add_text(text)
>
> def title1(self, text=''):
> self.title(text=text)
>
> def title2(self, text=''):
> self.title(text='', style="Heading 2")
>
> ...
>
> def title9(self, text=''):
> self.title(text='', style="Heading 9")
>
> -
>
>
> I just wanted to improve a little by doing something like that (pseudo
> code):
>
> def title9(self, text=''):
> self.title(text='', style="Heading " + .split()[1])
>
>
> In short the number in the funtion name is the number of the title
> depth in the document.
> There is no big deal if Iit's not feasible;
>
> Cheers
> Karim
>
>
>
Those are methods, not functions. So if you have a bunch of methods,
differing only in the numeric suffix their names have, and one of the
parameters to a method they each call, there's probably a simpler way.
First, you could create function objects (using approaches like
partial), turn them into methods, and attach them to a class with
generated names (somebody else will have to help you do it; I just am
pretty sure it's possible)
Second, ifyou can control the code which will be calling these methods,
you could just have that code parameterize things a little differently.
For example, instead of calling
obj.title9("my text")
it might call
obj.title(9, "my text")
where title() is a pretty simple, single method.
--
DaveA
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Re: [Tutor] Emailing code
myles broomes wrote: This question isnt so much related to a specific program, just something im curious about. What is the best way to email code? I find that when i copy and paste it into an email, the indentation and spacing gets all messed up. Don't send HTML, because that is poison to correct formatting of Python code. Mail clients feel free to reformat indentation and spacing in arbitrary ways with HTML emails. Find the setting in your mail client to turn off all formatting. My guess is that you are using Outlook or Outlook Express -- look for the setting about "Rich Text", and turn that off. If you can't turn it off, at least turn on the option to send both HTML (rich text) and plain text. The HTML version will probably be mangled, but the plain text version should be okay. If you are using Thunderbird, turning off format=flowed can sometimes help. http://kb.mozillazine.org/Plain_text_e-mail_%28Thunderbird%29 For large amounts of code, don't copy and paste into your email. Nearly every email program in the world allows you to attach attachments. Just attach the .py file and send that. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Tkinter GUI crashing problem
On 06/04/12 23:07, myles broomes wrote: Im working the Tkinter and I'm having a problem with the GUI I made. > It crashes whenever I hit the submit button. Heres my code: What do you mean by crashes? It looks to me like it should lock up rather than crash. Your update_txt method goes into an infinite loop: > while self.guess_ent.get(): > guess = self.guess_ent.get() > if int(guess)> number: > message += "Lower..." > self.txt_box.delete(0.0,END) > self.txt_box.insert(0.0,message) > else: > message += "Higher..." > self.txt_box.delete(0.0,END) > self.txt_box.insert(0.0,message) > Since this never exits the screen never refreshes to allow the user to enter a new value in the guess_ent box. loops inside event handling methods are always risky and should be avoided if at all possible. Open ended while loops are especially prone to non termination. If you need to process something repeatedly its usually better in a GUI program to do it via a timer event that continually calls the function. (Or using a background thread but thats a whole different can of worms) But in this case the whole while loop is completely redundant. Tkinter provides an event loop, you just need to handle one guess at a time and let the user press submit each time. If you really are crashing please run the code from inside an OS console and capture the stack trace and send it to us. -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How do you save work in progress in Pyscripter ?
On 06/04/12 20:11, Thomas Mujica wrote: *Was able to write and successfully run this but I can’t seem to be able to “save” it* You have written the code at the interactive prompt which is really intended for experimenting. To save the code as a python script you need to create a plain text file and save it with a .py extension (assuming you are on Windows). You could use something as basic as Notepad to create it but most IDEs or specialist programming editors will be more useful. I don;t know pyscripter but usually you can use the File->New menu to create a new blank editor window where you can type the code. You then save it with File->Save/SaveAs as usual. How you run it varies by IDE... Note you don't type the >>> and other stuff that the interpreter puts out, so your code would look like: from decimal import * getcontext().prec=3 #change decimal precision to 3 decimal places* for a in xrange(1,30): #NESTED note no matter what the variables for b in xrange(1,30): #LOOPS DO 29 ITERATIONS* c=pow(a,2)+pow(b,2) # this is really c squared because a and b are h=pow(c,.5) #pow is .5 so h is the square root of c …..h is the d=round(h,2) if a==1 and b==1: #will allow titles to be printed at beginning of print "Side a","Side b","Hypotenuse" if h==d and d==h: #will eliminate all values of h that are not print" ",a,"\t",b,"\t\t",h #for alignment purpose “3 spaces “ There are some odd things in that code that I could comment on, but for now I'll ignore them and see if you can get the script running first. HTH -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Tkinter GUI crashing problem
On 4/6/2012 3:07 PM myles broomes said... import random from tkinter import * What version of python on what platform please... Emile ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Tkinter GUI crashing problem
Im working the Tkinter and I'm having a problem with the GUI I made. It crashes
whenever I hit the submit button. Heres my code:
#Guess my number 2.0
#The guess my number game but using a GUI
import random
from tkinter import *
class Application(Frame):
"""GUI to hold widgets. """
def __init__(self,master):
super(Application,self).__init__(master)
self.grid()
self.createWidgets()
def createWidgets(self):
"""GUI widgets. """
#Label instructing the user to take a guess
Label(self,text="Take a guess:").grid(row=0,column=0)
#Entry widget where the user makes a guess
self.guess_ent = Entry(self)
self.guess_ent.grid(row=1,column=0)
#Button that updates the text box
self.submit_bttn =
Button(self,command=self.update_txt,text="Submit guess")
self.submit_bttn.grid(row=2,column=0)
#Text box to update the user on whether their guess is correct
self.txt_box = Text(self,width=35,height=5,wrap=WORD)
self.txt_box.grid(row=3,column=0)
def update_txt(self):
"""Updates the text box widget. """
#Get user input from the entry widget
number = random.randint(1,100)
message = ""
guess = None
while self.guess_ent.get():
guess = self.guess_ent.get()
if int(guess) > number:
message += "Lower..."
self.txt_box.delete(0.0,END)
self.txt_box.insert(0.0,message)
else:
message += "Higher..."
self.txt_box.delete(0.0,END)
self.txt_box.insert(0.0,message)
if int(guess) == number:
message += "Congrarulations! You guessed correctly! A
new number has been generated."
self.txt_box.delete(0.0,END)
self.txt_box.insert(0.0,message)
#main
root = Tk()
root.title("Guess my number")
app = Application(root)
root.mainloop()
Its frustrating because I dont even get an error code. I coded the last
function in a seperate program without a GUI and it runs fine so I have no clue
what the problem can be. Any help would be much appreciated.
Myles Broomes
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Re: [Tutor] Emailing code
On Fri, Apr 6, 2012 at 12:14 PM, myles broomes wrote: > This question isnt so much related to a specific program, just something im > curious about. What is the best way to email code? I find that when i copy > and paste it into an email, the indentation and spacing gets all messed up. as an alternative to emailing code, you can paste(bin) it online and just send (or tweet or G+ or otherwise post) the URL... there are many providers of this type of service out there: http://www.similarsitesearch.com/alternatives-to/pastebin.com cheers, -- wesley - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "A computer never does what you want... only what you tell it." wesley chun : wescpy at gmail : @wescpy/+wescpy Python training & consulting : http://CyberwebConsulting.com "Core Python" books : http://CorePython.com Python blog: http://wescpy.blogspot.com ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] How do you save work in progress in Pyscripter ?
Please help a newbie Was able to write and successfully run this but I can't seem to be able to "save" it Luckily I had saved it to Word and then I was able to copy and paste it back into PyScripter. I'm using Python Scripter Version 2.5.3.0 x86 *** Python 2.7.2 (default, Jun 12 2011, 15:08:59) [MSC v.1500 32 bit (Intel)] on win32. *** *** Remote Python engine is active *** >>> >>> from decimal import * >>> getcontext() Context(prec=28, rounding=ROUND_HALF_EVEN, Emin=-9, Emax=9, capitals=1, flags=[], traps=[DivisionByZero, InvalidOperation, Overflow]) >>> getcontext().prec=3#change decimal precision to 3 decimal places >>> for a in xrange(1,30): #NESTED note no matter what the variables are the syntax is always xrange ... for b in xrange(1,30): #LOOPS DO 29 ITERATIONS ... c=pow(a,2)+pow(b,2)# this is really c squared because a and b are raised to exponent 2 ... h=pow(c,.5) #pow is .5 so h is the square root of c ...h is the hypotenuse ... d=round(h,2) ... if a==1 and b==1: #will allow titles to be printed at beginning of print out ... print "Side a","Side b","Hypotenuse" ... if h==d and d==h:#will eliminate all values of h that are not integers from printout ... print" ",a,"\t",b,"\t\t",h #for alignment purpose "3 spaces " before a then tab b, and 2tabs ... # before h Side a Side b Hypotenuse 3 4 5.0 4 3 5.0 5 1213.0 6 8 10.0 7 2425.0 8 6 10.0 8 1517.0 9 1215.0 102426.0 125 13.0 129 15.0 121620.0 158 17.0 152025.0 161220.0 182430.0 201525.0 202129.0 212029.0 212835.0 247 25.0 241026.0 241830.0 282135.0 ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Emailing code
On 4/6/2012 12:14 PM myles broomes said... This question isnt so much related to a specific program, just something im curious about. What is the best way to email code? I find that when i copy and paste it into an email, the indentation and spacing gets all messed up. Set your email client content type to deliver plain text -- anything html-ish allows compression of spaces hence the formatting loss. Emile ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How to have the name of a function inside the code of this function?
Le 06/04/2012 19:31, Alan Gauld a écrit :
On 06/04/12 09:47, Karim wrote:
If you have any idea to get the caller name inside the caller.
Its not normally very helpful since in Python the same function can
have many names:
def F(x):
return x*x
a = F
b = F
c - lambda y: F(y)
print F(1), a(2), b(3), c(4)
Now, why would knowing whether the caller used F,a or b
to call the same function object help? And what do you
do in the case of c()? Do you return 'c' or 'F'?
Maybe you could use it to tell you the context from
which they were calling? But in that case there are
usually better, more reliable, techniques
- like examining the stackframe.
HTH,
Thanks Steven, Moduok and Steven for all your answers!
The reason is simple I wanted to optimize some code using pyuno for
openoffice.org doc generation I have several methods to set
text with "Heading 1", ... "Heading " title style:
def title(self, text='', style="Heading 1"):
self._cursor_text.setPropertyValue('ParaStyleName', style)
self.add_text(text)
def title1(self, text=''):
self.title(text=text)
def title2(self, text=''):
self.title(text='', style="Heading 2")
...
def title9(self, text=''):
self.title(text='', style="Heading 9")
-
I just wanted to improve a little by doing something like that (pseudo
code):
def title9(self, text=''):
self.title(text='', style="Heading " + .split()[1])
In short the number in the funtion name is the number of the title depth
in the document.
There is no big deal if Iit's not feasible;
Cheers
Karim
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[Tutor] Emailing code
This question isnt so much related to a specific program, just something im curious about. What is the best way to email code? I find that when i copy and paste it into an email, the indentation and spacing gets all messed up. Myles Broomes ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How to use g_timeout_add () function?
Please don't top post and please reply to the list Top posting fixed. - Forwarded Message - From: Lion Chen To: Mark Lawrence Cc: Sent: Friday, 6 April 2012, 16:43 Subject: Re: [Tutor] How to use g_timeout_add () function? fixed top posting > On 06/04/2012 15:17, Lion Chen wrote: >> Hello all, i have a question: >> >> when i check gtk_time_out in the gtk+2 reference, it said " >> |gtk_timeout_add|has been deprecated since version 2.4 and should not be >> used in newly-written code. Use |g_timeout_add()|instead." >> >> but i don't know how tu use the g_timout_add() function: >> my_id = g_timeout_add(500, myfunction()) >> >> or: >> >> my_id = gtk.g_timeout_add(500, myfunction()) >> >> everytime i run the program, it prompted me a message like modules do >> not have g_timeout_add() attribute. >> >> so i still have to use gtk_timeout_add >> >> anybody help me? >> >> Lion Chen >> >> ___ >> Tutor maillist - Tutor@python.org >> To unsubscribe or change subscription options: >> http://mail.python.org/mailman/listinfo/tutor > > It's much easier for us to help if you provide an exact snippet of > code that reproduces the problem with the error message cut and > pasted. Having said that there's nothing to stop you using > gtk_timeout_add as it's only deprecated, i.e. it's been marked for > removal at some time in the future. > the problem is solved. in Python, should use gobject.timeout_add() replace the g_timeout_add() g_timeout_add() is for c. -- Cheers. Mark Lawrence. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How to have the name of a function inside the code of this function?
On 06/04/12 09:47, Karim wrote: If you have any idea to get the caller name inside the caller. Its not normally very helpful since in Python the same function can have many names: def F(x): return x*x a = F b = F c - lambda y: F(y) print F(1), a(2), b(3), c(4) Now, why would knowing whether the caller used F,a or b to call the same function object help? And what do you do in the case of c()? Do you return 'c' or 'F'? Maybe you could use it to tell you the context from which they were calling? But in that case there are usually better, more reliable, techniques - like examining the stackframe. HTH, -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] which gets called
On Friday, April 06, 2012 06:54:28 AM John Fabiani wrote:
> Hi,
>
> I want to create a class that inherits two other classes.
>
> class NewClass( A,B)
>
> But both "A" and "B" contain a method with the same name ("onKeyDown").
>
> If my "NewClass" does not contain something to override the methods which
> one would be called if
>
> myinstance = NewClass()
>
> myinstance.onKeyDown()
>
>
> Second to insure the right one is called is it possible to do the following
>
> NewClass(object):
>
> def onKeyDown(self, event):
> b.onKeyDown(event)
>
> Johnf
Thanks guys!
The class I'm creating is inheriting from classes I did not create. And of
course the inherited classes are from different authors. So I'm attempting to
create a wrapper and the problem comes from the keyboard events. Each of the
classes has a onKeyDown method and I only want one to work and then pass the
data to the second.
But you have helped (along with the links). And I have successfully got the
right method called. The issue is now getting the second (B) to fire
correctly.
Johnf
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Re: [Tutor] which gets called
On 06/04/2012 14:54, John Fabiani wrote:
Hi,
I want to create a class that inherits two other classes.
class NewClass( A,B)
But both "A" and "B" contain a method with the same name ("onKeyDown").
If my "NewClass" does not contain something to override the methods which one
would be called if
myinstance = NewClass()
myinstance.onKeyDown()
Please see
http://docs.python.org/tutorial/classes.html#multiple-inheritance. This
references http://www.python.org/download/releases/2.3/mro/ Having read
these why not try typing code into the interactive prompt and see what
happens? Worst case you get an exception, if you don't understand it
cut and paste it to a reply to this and we'll help out.
Second to insure the right one is called is it possible to do the following
NewClass(object):
def onKeyDown(self, event):
b.onKeyDown(event)
It's B.onKeyDown(self, event), without the self you'll get an unbound
method error.
Johnf
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--
Cheers.
Mark Lawrence.
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Re: [Tutor] How to use g_timeout_add () function?
On 06/04/2012 15:17, Lion Chen wrote: Hello all, i have a question: when i check gtk_time_out in the gtk+2 reference, it said " |gtk_timeout_add|has been deprecated since version 2.4 and should not be used in newly-written code. Use |g_timeout_add()|instead." but i don't know how tu use the g_timout_add() function: my_id = g_timeout_add(500, myfunction()) or: my_id = gtk.g_timeout_add(500, myfunction()) everytime i run the program, it prompted me a message like modules do not have g_timeout_add() attribute. so i still have to use gtk_timeout_add anybody help me? Lion Chen ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor It's much easier for us to help if you provide an exact snippet of code that reproduces the problem with the error message cut and pasted. Having said that there's nothing to stop you using gtk_timeout_add as it's only deprecated, i.e. it's been marked for removal at some time in the future. -- Cheers. Mark Lawrence. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] which gets called
On 6 April 2012 15:54, John Fabiani wrote:
> Hi,
>
> I want to create a class that inherits two other classes.
>
> class NewClass( A,B)
>
> But both "A" and "B" contain a method with the same name ("onKeyDown").
>
> If my "NewClass" does not contain something to override the methods which one
> would be called if
>
> myinstance = NewClass()
>
> myinstance.onKeyDown()
Hi John,
Easy enough to sort out with a little experiment:
>>> class A(object):
def doit(self):
print "A"
>>> class B(object):
def doit(self):
print "B"
>>> class C(A,B):
def __init__(self):
self.doit()
>>> c=C()
A
> Second to insure the right one is called is it possible to do the following
>
> NewClass(object):
>
> def onKeyDown(self, event):
> b.onKeyDown(event)
>
Perhaps this helps, some:
>>> class D(A,B):
def __init__(self):
self.doit()
def doit(self):
print "D"
super(D, self).doit()
>>> d=D()
D
A
>>> class E(A,B):
def __init__(self):
B.doit(self)
>>> e=E()
B
>>>
Best,
Brian vdB
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Re: [Tutor] which gets called
John Fabiani wrote:
Hi,
I want to create a class that inherits two other classes.
class NewClass( A,B)
But both "A" and "B" contain a method with the same name ("onKeyDown").
If my "NewClass" does not contain something to override the methods which one
would be called if
myinstance = NewClass()
myinstance.onKeyDown()
This depends on whether classes A and B are designed for cooperative multiple
inheritance or not.
The short answer is, A.onKeyDown will be called, because A is listed first.
The longer answer is, if A.onKeyDown uses super() to manager multiple
inheritance, both A and B.onKeyDown may be called.
Here is an example with no cooperative multiple inheritance:
class A(object):
def onKeyDown(self):
print('A deals with keydown event')
class B(object):
def onKeyDown(self):
print('B deals with keydown event')
class NewClass(A, B):
pass
And in use, you will see that A blocks B:
py> instance = NewClass()
py> instance.onKeyDown()
A deals with keydown event
And here is a second example using super() for cooperative multiple inheritance:
class A(object):
def onKeyDown(self):
print('A deals with keydown event')
super(A, self).onKeyDown()
# in Python 3, you can just use "super().onKeyDown()"
class B(object):
def onKeyDown(self):
print('B deals with keydown event')
# B does not call super(), because there are no
# further parent classes to call.
class NewClass(A, B):
pass
And in use:
py> instance = NewClass()
py> instance.onKeyDown()
A deals with keydown event
B deals with keydown event
Second to insure the right one is called is it possible to do the following
NewClass(object):
def onKeyDown(self, event):
b.onKeyDown(event)
Yes, but that normally should not be necessary if you design your classes
carefully.
--
Steven
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Re: [Tutor] How to use g_timeout_add () function?
> Hello all, i have a question: > > when i check gtk_time_out in the gtk+2 reference, it said " gtk_timeout_add > has been deprecated since version 2.4 and should not be used in newly-written > code. Use g_timeout_add() instead." > > but i don't know how tu use the g_timout_add() function: > my_id = g_timeout_add(500, myfunction()) > > or: > > my_id = gtk.g_timeout_add(500, myfunction()) > > everytime i run the program, it prompted me a message like modules do not > have g_timeout_add() attribute. Although the error is reasonably clear, it's always good to specify the whole traceback (copy-paste it). It could show other (non)obvious mistakes. If your module does not have g_timeout_add, then either your module is old, or it is in another (sub)module. You would have to search the documentation for the latter. You actually don't say whether the above statement comes from the GTK2 documentation, or the pygtk documentation; I would assume the latter, since that makes more sense. But if the former, GTK and PyGTK may not be 100% in sync. > so i still have to use gtk_timeout_add > > anybody help me? PyGTK has its own mailing list (and even an IRC channel), which may be more practical in this specific case. Have a look over there: http://www.pygtk.org/feedback.html Cheers, Evert ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] which gets called
> Hi,
>
> I want to create a class that inherits two other classes.
>
> class NewClass( A,B)
>
> But both "A" and "B" contain a method with the same name ("onKeyDown").
>
> If my "NewClass" does not contain something to override the methods which one
> would be called if
>
> myinstance = NewClass()
>
> myinstance.onKeyDown()
>
If I remember correctly, A.onKeyDown.
But things can get more complicated in other cases. See also the following post
for a read on the MRO (method resolution order); could help to clarify things
(or confuse you further):
http://python-history.blogspot.com/2010/06/method-resolution-order.html
> Second to insure the right one is called is it possible to do the following
>
> NewClass(object):
>
> def onKeyDown(self, event):
> b.onKeyDown(event)
What is b here? Are you (trying to) save(ing) a parent as a instance in the
class? Or should that be uppercase B?
The latter would work, I think, though you'll have to put `self` here
explicitly (since you're calling it without an instance, *and* you want to tell
the method the instance is NewClass() instead of eg B()):
def onKeyDown(self, event):
B.onKeyDown(self, event)
Cheers,
Evert
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Re: [Tutor] a problem with a server and client
actually, you are right... in addition to that problem, there was the
encodeing/decoding issue you mentioned on both the client and server.
thanks
On Fri, Apr 6, 2012 at 5:08 PM, Khalid Al-Ghamdi wrote:
> yah i did the search, and tried the solution, but it didn't work nice
> of you to have tried, though...
>
> anyhow, i found where the problem is... on the client side it should be
> connect() instead of bind() in :
>
> > tcpCliSock.bind(ADDR)
>
> thanks
>
>
> On Fri, Apr 6, 2012 at 4:59 PM, Evert Rol wrote:
>
>> > i'm trying to implement a server that adds a time stamp to incoming
>> text form a client.
>> >
>> > the server's code is (but doesn't seem to have the problem as demoed by
>> the error below:
>> >
>> > from socket import *
>> > from time import ctime
>> >
>> > HOST = ''
>> > PORT = 21567
>> > BUFSIZ = 1024
>> > ADDR =(HOST, PORT)
>> >
>> > tcpSerSock = socket(AF_INET, SOCK_STREAM)
>> >
>> > tcpSerSock.bind(ADDR)
>> > tcpSerSock.listen(5)
>> >
>> > while True:
>> > print('waiting for connection ...')
>> > tcpCliSock, addr =tcpSerSock.accept()
>> > print('...connected from: ', addr)
>> >
>> > while True:
>> > data = tcpCliSock.recv(BUFSIZ)
>> > if not data:
>> > break
>> > tcpCliSock.send('[{}] {}'.format(bytes(ctime(), 'utf-8'),data))
>> >
>> > tcpCliSock.close()
>> > tcpSerSock.close()
>> >
>> >
>> >
>> > the client's code is:
>> >
>> > from socket import *
>> >
>> >
>> > HOST = 'localhost'
>> > PORT = 21567
>> > BUFSIZ = 1024
>> > ADDR =(HOST, PORT)
>> >
>> > tcpCliSock = socket(AF_INET, SOCK_STREAM)
>> >
>> > tcpCliSock.bind(ADDR)
>> >
>> > while True:
>> > data=input('> ')
>> > if not data:
>> > break
>> > tcpCliSock.send(data)
>> > data = tcpCliSock.recv(BUFSIZ)
>> > if not data:
>> > break
>> > print(data.decode('utf-8'))
>> >
>> > tcpCliSock.close()
>> >
>> > the problem is i get the following error when i enter some text:
>> >
>> > Traceback (most recent call last):
>> > File "C:\Python32\tsTclnt3.py", line 17, in
>> > tcpCliSock.send(data)
>> > TypeError: 'str' does not support the buffer interface
>>
>> Did you try to search on the error string? That would have gotten you the
>> solution (even) faster.
>> The first two Google hits (and probably all the rest of them), tell me
>> that Python 3's socket.send() method wants bytes as input, not str. See
>> http://docs.python.org/py3k/library/socket.html#socket.socket.send
>>
>> Hope that helps,
>>
>> Evert
>>
>>
>> >
>> > can you help?
>> > ___
>> > Tutor maillist - Tutor@python.org
>> > To unsubscribe or change subscription options:
>> > http://mail.python.org/mailman/listinfo/tutor
>>
>>
>
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[Tutor] How to use g_timeout_add () function?
Hello all, i have a question: when i check gtk_time_out in the gtk+2 reference, it said " |gtk_timeout_add|has been deprecated since version 2.4 and should not be used in newly-written code. Use |g_timeout_add()|instead." but i don't know how tu use the g_timout_add() function: my_id = g_timeout_add(500, myfunction()) or: my_id = gtk.g_timeout_add(500, myfunction()) everytime i run the program, it prompted me a message like modules do not have g_timeout_add() attribute. so i still have to use gtk_timeout_add anybody help me? Lion Chen ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] a problem with a server and client
yah i did the search, and tried the solution, but it didn't work nice
of you to have tried, though...
anyhow, i found where the problem is... on the client side it should be
connect() instead of bind() in :
> tcpCliSock.bind(ADDR)
thanks
On Fri, Apr 6, 2012 at 4:59 PM, Evert Rol wrote:
> > i'm trying to implement a server that adds a time stamp to incoming text
> form a client.
> >
> > the server's code is (but doesn't seem to have the problem as demoed by
> the error below:
> >
> > from socket import *
> > from time import ctime
> >
> > HOST = ''
> > PORT = 21567
> > BUFSIZ = 1024
> > ADDR =(HOST, PORT)
> >
> > tcpSerSock = socket(AF_INET, SOCK_STREAM)
> >
> > tcpSerSock.bind(ADDR)
> > tcpSerSock.listen(5)
> >
> > while True:
> > print('waiting for connection ...')
> > tcpCliSock, addr =tcpSerSock.accept()
> > print('...connected from: ', addr)
> >
> > while True:
> > data = tcpCliSock.recv(BUFSIZ)
> > if not data:
> > break
> > tcpCliSock.send('[{}] {}'.format(bytes(ctime(), 'utf-8'),data))
> >
> > tcpCliSock.close()
> > tcpSerSock.close()
> >
> >
> >
> > the client's code is:
> >
> > from socket import *
> >
> >
> > HOST = 'localhost'
> > PORT = 21567
> > BUFSIZ = 1024
> > ADDR =(HOST, PORT)
> >
> > tcpCliSock = socket(AF_INET, SOCK_STREAM)
> >
> > tcpCliSock.bind(ADDR)
> >
> > while True:
> > data=input('> ')
> > if not data:
> > break
> > tcpCliSock.send(data)
> > data = tcpCliSock.recv(BUFSIZ)
> > if not data:
> > break
> > print(data.decode('utf-8'))
> >
> > tcpCliSock.close()
> >
> > the problem is i get the following error when i enter some text:
> >
> > Traceback (most recent call last):
> > File "C:\Python32\tsTclnt3.py", line 17, in
> > tcpCliSock.send(data)
> > TypeError: 'str' does not support the buffer interface
>
> Did you try to search on the error string? That would have gotten you the
> solution (even) faster.
> The first two Google hits (and probably all the rest of them), tell me
> that Python 3's socket.send() method wants bytes as input, not str. See
> http://docs.python.org/py3k/library/socket.html#socket.socket.send
>
> Hope that helps,
>
> Evert
>
>
> >
> > can you help?
> > ___
> > Tutor maillist - Tutor@python.org
> > To unsubscribe or change subscription options:
> > http://mail.python.org/mailman/listinfo/tutor
>
>
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[Tutor] which gets called
Hi,
I want to create a class that inherits two other classes.
class NewClass( A,B)
But both "A" and "B" contain a method with the same name ("onKeyDown").
If my "NewClass" does not contain something to override the methods which one
would be called if
myinstance = NewClass()
myinstance.onKeyDown()
Second to insure the right one is called is it possible to do the following
NewClass(object):
def onKeyDown(self, event):
b.onKeyDown(event)
Johnf
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Re: [Tutor] a problem with a server and client
> i'm trying to implement a server that adds a time stamp to incoming text form
> a client.
>
> the server's code is (but doesn't seem to have the problem as demoed by the
> error below:
>
> from socket import *
> from time import ctime
>
> HOST = ''
> PORT = 21567
> BUFSIZ = 1024
> ADDR =(HOST, PORT)
>
> tcpSerSock = socket(AF_INET, SOCK_STREAM)
>
> tcpSerSock.bind(ADDR)
> tcpSerSock.listen(5)
>
> while True:
> print('waiting for connection ...')
> tcpCliSock, addr =tcpSerSock.accept()
> print('...connected from: ', addr)
>
> while True:
> data = tcpCliSock.recv(BUFSIZ)
> if not data:
> break
> tcpCliSock.send('[{}] {}'.format(bytes(ctime(), 'utf-8'),data))
>
> tcpCliSock.close()
> tcpSerSock.close()
>
>
>
> the client's code is:
>
> from socket import *
>
>
> HOST = 'localhost'
> PORT = 21567
> BUFSIZ = 1024
> ADDR =(HOST, PORT)
>
> tcpCliSock = socket(AF_INET, SOCK_STREAM)
>
> tcpCliSock.bind(ADDR)
>
> while True:
> data=input('> ')
> if not data:
> break
> tcpCliSock.send(data)
> data = tcpCliSock.recv(BUFSIZ)
> if not data:
> break
> print(data.decode('utf-8'))
>
> tcpCliSock.close()
>
> the problem is i get the following error when i enter some text:
>
> Traceback (most recent call last):
> File "C:\Python32\tsTclnt3.py", line 17, in
> tcpCliSock.send(data)
> TypeError: 'str' does not support the buffer interface
Did you try to search on the error string? That would have gotten you the
solution (even) faster.
The first two Google hits (and probably all the rest of them), tell me that
Python 3's socket.send() method wants bytes as input, not str. See
http://docs.python.org/py3k/library/socket.html#socket.socket.send
Hope that helps,
Evert
>
> can you help?
> ___
> Tutor maillist - Tutor@python.org
> To unsubscribe or change subscription options:
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[Tutor] a problem with a server and client
hi,
i'm trying to implement a server that adds a time stamp to incoming text
form a client.
the server's code is (but doesn't seem to have the problem as demoed by the
error below:
from socket import *
from time import ctime
HOST = ''
PORT = 21567
BUFSIZ = 1024
ADDR =(HOST, PORT)
tcpSerSock = socket(AF_INET, SOCK_STREAM)
tcpSerSock.bind(ADDR)
tcpSerSock.listen(5)
while True:
print('waiting for connection ...')
tcpCliSock, addr =tcpSerSock.accept()
print('...connected from: ', addr)
while True:
data = tcpCliSock.recv(BUFSIZ)
if not data:
break
tcpCliSock.send('[{}] {}'.format(bytes(ctime(), 'utf-8'),data))
tcpCliSock.close()
tcpSerSock.close()
the client's code is:
from socket import *
HOST = 'localhost'
PORT = 21567
BUFSIZ = 1024
ADDR =(HOST, PORT)
tcpCliSock = socket(AF_INET, SOCK_STREAM)
tcpCliSock.bind(ADDR)
while True:
data=input('> ')
if not data:
break
tcpCliSock.send(data)
data = tcpCliSock.recv(BUFSIZ)
if not data:
break
print(data.decode('utf-8'))
tcpCliSock.close()
the problem is i get the following error when i enter some text:
Traceback (most recent call last):
File "C:\Python32\tsTclnt3.py", line 17, in
tcpCliSock.send(data)
TypeError: 'str' does not support the buffer interface
can you help?
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Re: [Tutor] How to have the name of a function inside the code of this function?
On 4/6/12, Karim wrote: > > Hello all, > > > I have : > > def foo(): > print( getattr(foo, 'func_name')) > > Where I get the name of the function but I add to give the name of this > function. Indeed it is not very helpful... > I checked the globals() but how I can do to get > globals()['toto'].func_name. This is not more helpful ;o) > > If you have any idea to get the caller name inside the caller. > The following works, but only on implementations which provide stack frame support. As the docs kindly point out: "...this isn't guaranteed to exist in all implementations of Python." Example code: import inspect def foo(): '''Print my own name.''' frame_info = inspect.getframeinfo(inspect.currentframe()) print(frame_info.function) foo() That said, there's probably a better way to solve whatever bigger problem you're trying solve. -Modulok- ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Is socket.socket() a func or a class
Khalid Al-Ghamdi wrote: hi all, I'm reading this book that says when creating a socket you have to use the socket.socket() *function *as in : ss=socket.socket() but whey i check they type it says it's a class which makes sense cause you're creating a socket object. type(ss) so, which is it? or do authors loosely use these terms interchangeably in this context? Yes. Sometimes people call things a function when technically they mean a "callable". A callable is anything that can be called like a function: functions, classes, types, methods, etc. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How to have the name of a function inside the code of this function?
Karim wrote: Hello all, I have : def foo(): print( getattr(foo, 'func_name')) Why not this? def foo(): print 'foo' You already know the name of the function. There is no portable way of retrieving the name of the current function from within that function. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] How to have the name of a function inside the code of this function?
Hello all, I have : def foo(): print( getattr(foo, 'func_name')) Where I get the name of the function but I add to give the name of this function. Indeed it is not very helpful... I checked the globals() but how I can do to get globals()['toto'].func_name. This is not more helpful ;o) If you have any idea to get the caller name inside the caller. Cheers Karim ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Is socket.socket() a func or a class
On 06/04/12 07:10, Khalid Al-Ghamdi wrote: I'm reading this book that says when creating a socket you have to use the socket.socket() _function _as in : ... >>> type(ss) so, which is it? or do authors loosely use these terms interchangeably in this context? It just looks like sloppy terminology to me. >>> import socket as s >>> s.socket >>> s.gethostbyname -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Running scripts at login
On 06/04/12 03:07, Michael Lewis wrote: What if I want to send the executable to someone and have their machine run the script at startup? Assume I don't have access to their machine to add the script to the startup program group. How can I make that happen? When you say executable in reference to a Python script you need to be careful about what you mean. Because Python is an interpreted language the executable can be either the python interpreter (python.exe) or the script that the interpreter is executing (myscript.py). If your friend already has Python installed on their computer (and many nowadays do) then you just need to send the python script and ask them to save it into their startup group (or more likely create a link to it in their startup group) If they are non computer literate you could write an installer or batch file that copied the file to the relevant place. If your friend does not have Python installed you can either: 1) send them the Python installer and your script 2) get them to download and install python before running your script. 3) use a program like py2exe to bundle your script and the interpreter into a single self executing file HTH -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
