As a new guy, I was trying to write a simple unit conversion
program in Tk. I got this error message:TclError: unknown option "-command"
Traceback (most recent call last):
File
"D:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
line 310, in RunScript
exec in __maindict__
File "D:\Python24\Convert it\Tk Grid demo2py.py", line 70, in ?
main()
File "D:\Python24\Convert it\Tk Grid demo2py.py", line 67, in main
Application().mainloop()
File "D:\Python24\Convert it\Tk Grid demo2py.py", line 22, in __init__
, relief=SUNKEN)
File "D:\Python24\lib\lib-tk\Tkinter.py", line 2409, in __init__
Widgetinit__(self, master, 'listbox', cnf, kw)
File "D:\Python24\lib\lib-tk\Tkinter.py", line 1862, in __init__
self.tk.call(
TclError: unknown option "-command"
Any Ideas?
Joe Cox
513-293-4830
Tutor maillist - Tutor (AT) python (DOT) org

"""Create the Second ListBox"""

self.lbRSSItems = Listbox(self, exportselection=0
,command=self.reveal
, relief=SUNKEN)

Because whitespace is important in python,
you can't arbitrarily put newlines into your text.
Your program is getting confused because it doesn't know what ',
relief=SUNKEN)' means.
Try putting a '\' before your newlines.
Like:
x = \
'a'

HTH,
-Luke

Tutor maillist - Tutor (AT) python (DOT) org

Joe Cox wrote:
As a new guy, I was trying to write a simple unit conversion
program in Tk. I got this error message:TclError: unknown option "-command"
--

Traceback (most recent call last):

File
"D:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
line 310, in RunScript
exec in __maindict__
File "D:\Python24\Convert it\Tk Grid demo2py.py", line 70, in ?
main()
File "D:\Python24\Convert it\Tk Grid demo2py.py", line 67, in main
Application().mainloop()
File "D:\Python24\Convert it\Tk Grid demo2py.py", line 22, in __init__
, relief=SUNKEN)
File "D:\Python24\lib\lib-tk\Tkinter.py", line 2409, in __init__
Widgetinit__(self, master, 'listbox', cnf, kw)
File "D:\Python24\lib\lib-tk\Tkinter.py", line 1862, in __init__
self.tk.call(
TclError: unknown option "-command"

Any Ideas?

self.lbSites = Listbox(self,command=self.reveal, exportselection=0
, relief=SUNKEN)

Acually I think it was this line that was causing trouble first :)
Same reason, though.
Cheers,
-Luke

Tutor maillist - Tutor (AT) python (DOT) org

Sunday 22 2006 20:03, Luke Paireepinart wrote:
"""Create the Second ListBox"""

self.lbRSSItems = Listbox(self, exportselection=0
,command=self.reveal
, relief=SUNKEN)

Because whitespace is important in python,
you can't arbitrarily put newlines into your text.
Your program is getting confused because it doesn't know what ',
relief=SUNKEN)' means.
Try putting a '\' before your newlines.
Like:
x = \
'a'
--
HTH,
-Luke
I'm not an expert Luke but I thought a statement can take more than one line
when enclosed in parentheses, square brackets or braces (also when triple
quoted). Is this correct?

John

Tutor maillist - Tutor (AT) python (DOT) org

johnf wrote:
Sunday 22 2006 20:03, Luke Paireepinart wrote:

"""Create the Second ListBox"""

self.lbRSSItems = Listbox(self, exportselection=0
,command=self.reveal
, relief=SUNKEN)

>Because whitespace is important in python,
>you can't arbitrarily put newlines into your text.
>Your program is getting confused because it doesn't know what ',
>relief=SUNKEN)' means.
>Try putting a '\' before your newlines.
>Like:
>x = \
>'a'
>>
>>
>HTH,
>-Luke
>
I'm not an expert Luke but I thought a statement can take more than one line
when enclosed in parentheses, square brackets or braces (also when triple
quoted). Is this correct?

Yep, yep.
I confess, I didn't look too closely at that, and I guess I heard one
should use backslashes whenever a command goes to a new line,
and I assumed it was always true, and never tried without them!
You're right, of course, John, and I apologize to the P. Alan had the
correct answer to the problem.
Listboxes don't take a command argument.

Hope that helps!
-Luke

Tutor maillist - Tutor (AT) python (DOT) org