On 11/02/2011 06:19, Paul Rubin wrote:
Rotwang<sg...@hotmail.co.uk> writes:
menu = Tkinter.Menu(master, tearoff = 0)
for k in x:
def f(j = k):
[do something that depends on j]
menu.add_command(label = str(k), command = f)
Still, I'd like to know if there's a more elegant method for creating
a set of functions indexed by an arbitrary list.
That is a standard python idiom. These days maybe I'd use partial
evaluation:
from functools import partial
def f(k): whatever...
for k in x:
menu.add_command(label=str(k), command=partial(f, k))
functools is new to me, I will look into it. Thanks.
the "pure" approach would be something like
def f(k): whatever...
for k in x:
menu.add_command(label=str(k),
command=(lambda x: lambda: f(x))(k))
I don't understand why this works. What is the difference between
(lambda x: lambda: f(x))(k)
and
lambda: f(k)
?
--
http://mail.python.org/mailman/listinfo/python-list
