[Tutor] More Tkinter Help Please

[SA]

On 6/15/02 1:56 AM, "Danny Yoo" <dyoo@hkn.eecs.berkeley.edu> wrote:

> 
> 
> On Fri, 14 Jun 2002 alan.gauld@bt.com wrote:
> 
>>> class PyShell:
>>>     def __init__(self, top):
>>>         self.b1 = Button(f, text="Execute", command=self.expyth)
>>>         self.b1.pack(side=LEFT)
>>> 
>>>     def expyth(self):
>>>         output = os.popen("python -c").t1()
>>>         self.t2.delete(0,END)
>>>         sys.stdout.write.t2(output)
>> 
>>> When I run this I get the following error:
>>> 
>>> Traceback (most recent call last): AttributeError: PyShell instance
>>> has no attribute 'expyth'
>> 
>> I think its because at the time that init is defined it can't see
>> self.expyth because its not been defined yet.  Try moving the init
>> method after all the other methods?
>> 
>> 
>> However I'm not really happy with that answer because init shouldn't run
>> till you create an instance which is after you define the class, so I
>> could very well be wrong!
> 
> 
> Hi SA,
> 
> Following up: did you find out what was causing this weird AttributeError?
> I'm just curious to know.  *grin*
> 
> 
> Talk to you later!
> 
> 
> 
> _______________________________________________
> Tutor maillist  -  Tutor@python.org
> http://mail.python.org/mailman/listinfo/tutor
> 
Sorry. I've been busy and have not had a chance to reply yet.

Yes I was able to figure the issue. It had to do with cut and pasting
between a vi file and a bbedit file. I messed up my tabs. I rewrote the
whole program with the correct tabs and everything runs now.(with a few
other changes.)

I'm now working on the "save" button and am having a bit of trouble. I think
it stems from my lack of OO understanding. Here is what I have so far:

from Tkinter import *
import os
import commands
import tkSimpleDialog

class PyShell:
    def clearin(self):
        self.t1.delete(0.0,END)
    def clearout(self):
        self.t2.delete(0.0,END)
    def expyth(self):
        self.t2.delete(0.0, END)
        self.output = commands.getoutput(self.t1.get(0.0, END))
        self.t2.insert(END, self.output)
    def __init__(self, top):
        self.t1 = Text(top, height="12", width="84", font="Courier 12")
        self.t1.pack(side=TOP, pady=2)
        f = Frame(top)
        f.pack()
        self.b1 = Button(f, text="Execute", command=self.expyth)
        self.b1.pack(side=LEFT)
        self.b2 = Button(f, text="Clear Input", command=self.clearin)
        self.b2.pack(side=LEFT)
        self.b3 = Button(f, text="Clear Output", command=self.clearout)
        self.b3.pack(side=LEFT)
        self.b4 = Button(f, text="Save Input", command=Saving)
        self.b4.pack(side=LEFT)
        self.t2 = Text(top, height="12", width="84", bg="lightblue",
font="Courier 12")
        self.t2.pack(side=TOP, pady=2)
        
class Saving(tkSimpleDialog.Dialog):
        def savin(self, question):
            Label(question, text="Directory:").grid(row=0)
            Label(question, text="Filename:").grid(row=1)
            self.e1 = Entry(question)
            self.e2 = Entry(question)
            self.e1.grid(row=0, column=1)
            self.e2.grid(row=1, column=1)
        def apply(self):
            dir = self.e1.get()
            fn = self.e2.get()
            sav = dir + fn
            savfile = open(sav, "w")
            for line in self.t1.readlines():
                savefile.write(line)
            osavefile.close()
            
root = Tk()
app = PyShell(root)
root.mainloop()

I think the problem is with:
class Saving(tkSimpleDialog.Dialog):

Since this is not a child of the PyShell class and therefore is not
inheriting? from this class? I think if I make PyShell inherit from
tkSimpleDialog.Dialog and Saving inherit from PyShell, this might work? What
do you think?

Thanks.
SA