Quoting Joseph Quigley <[EMAIL PROTECTED]>:
> Hi,
> what's the **kw stand for, used for? What does it mean?
Sorry about that. A couple of people have already answered; I'll just give you
a couple of examples which might help you understand:
>>> def showArgs(**kw):
... print kw
...
>>> showArgs(foo=1, bar=2, string='My string')
{'foo': 1, 'bar': 2, 'string': 'My string'}
Basically, **kw means "Take any keyword arguments that were unused, and put them
in a dictionary called 'kw'".
Here's another example:
>>> def myFunction(x=1, y=2, **kw):
... print "x == %s, y == %s" % (x, y)
... print "Unused arguments:", kw
...
>>> myFunction(a='foo', b='bar', y=8, c='baz', x=13)
x == 13, y == 8
Unused arguments: {'a': 'foo', 'c': 'baz', 'b': 'bar'}
Some of the keyword arguments are given explicit names, to make them easy to
access. The remainder are available still in kw.
You can also do the reverse:
>>> def doSomeMaths(x=3, y=2, z=8):
... return (x+y)*z
...
>>> kwargs = { 'x':4, 'y':3, 'z':2 }
>>> doSomeMaths(**kwargs)
14
In this case, the dictionary 'args' is expanded into three keyword parameters:
x=4, y=3, z=2
You can also do the same thing with positional parameters; in this case you just
use one *.
Does that help?
> Uh, not really, no. I'm very new to GUI. So you're saying that If I make
> the class actually do something (I edited and example in:
> An into to Tkinter, Fredrik Lundh).
Tkinter programming involves making Frames, Buttons, Labels, etc. and putting
them all together. What I like to do is subclass Frame (or other things) to
make new GUI components, which I can then pack() into Frames as normal.
Here's a really basic example:
from Tkinter import *
class BlueLabel(Label):
""" A Label with a blue background. """
def __init__(self, *args, **kw):
kw['background'] = 'blue'
Label.__init__(self, *args, **kw)
if __name__ == '__main__':
tk = Tk()
l1 = Label(tk, text='This is a normal label.')
l1.pack()
l2 = BlueLabel(tk, text='This is a blue label.')
l2.pack()
tk.mainloop()
(and, this time, I have tested this code :-) Although you may need to fix up the
indentation a bit)
> > currQuote = showquote.cget('config') # Get the current quote
As Michael pointed out, this was a bug. Sorry.
--
John.
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