Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #80150

Dictionaries with variable default.

Show all headers | View raw

Is it possible to have a default dictionary where the default is dependant
on the key?

I was hoping something like this might work:
>>> m = defaultdict(lambda key: key+1)

But it obviously doesn't:
>>> m[3]

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: <lambda>() takes exactly 1 argument (0 given)

-- 
Antoon Pardon

Back to comp.lang.python | Previous | Next | Find similar | Unroll thread

Thread

Dictionaries with variable default. Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2014-11-03 12:04 +0100

csiph-web