Alexandru Mosoi wrote:
On Aug 14, 12:02 am, Fredrik Lundh <[EMAIL PROTECTED]> wrote:
your use of the word "callback" is a bit unusual, and your example isn't
valid Python code, but it looks as if functools.partial might be what
you need:
http://docs.python.org/lib/module-functools.html
my current implementation is very similar to partial() :) (10x, i'll
use partial from now on). however it seems that I don't understand
very well positional and keyword arguments in python because I got the
error described here: http://docs.python.org/ref/calls.html#calls
(TypeError: f() got multiple values for keyword argument 'a') which
confused me even more. so if you pass positional and keyword arguments
to both partial() and function returned the order of passed arguments
might be different than expected. i was looking for an implementation
that somehow avoids this confusion.
Positional arguments come first, keyword arguments come second. You can pick up
positional keywords as a list and keyword arguments as a dictionary if you want:
def foo(*args, **kwargs):
for a in args:
#
# process positional arguments as a list
#
for k,v in kwargs.iteritems():
#
# Process keyword arguments by iterating over the dictionary
#
It is a little hard to understand exactly what you are wanting to do, but it
sounds like you should probably ONLY use keyword arguments and then there isn't
any problem with order or missing arguments (if you set appropriate defaults).
-Larry
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