On Jan 11, 4:38 pm, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
> I've been reading the following example, and couldn't figure out, what
> **kw mean. (It's an empty dictionary, but what's the semantics):
It's a keyword argument. It's some kind of repository for arguments
that aren't recognized.
If you have function like this:
def func(a, *args, *kw):
print a
print args
print kw
and you call the functin like this:
func('value A', 'value B', 'value C', argumentA = 'value D', argumentB
= 'value D')
the extra arguments would normally raise an error, but with the * and
**, Python would:
- assign 'value B' and 'value C' to args
- assign 'argumentA':'value D' and 'argumentB':'value E' to kw
so if you run the function, it will output:
####
value A
('value B', 'value C')
{'argumentB': 'value E', 'argumentA': 'value D'}
####
this args and kw can be accessed like a tuple and dictionary
respectively
See '4.7.2 Keyword Arguments' and '4.7.3 Arbitrary Argument Lists' on
Python Help File
--
http://mail.python.org/mailman/listinfo/python-list
