Yes, you maybe right. When use defaultdict, should not rely get() method
anymore, d[] is just enough. When a function return a defaultdict, but
people don't know it, so:
d = load_map()
# if she call d['a'], everything is OK but
# when call d.get('a'), she is always get None.
# Why she call
I asked you not to top-post. Please put your replies *below* the
messages you're quoting, not above. It's much easier to understand
the conversation that we're having if you do that, and much more
aggravating if you don't.
On Fri, 22 May 2009 09:53:04 +0100, Red Forks redfo...@gmail.com wrote:
On Sat, May 23, 2009 at 2:03 AM, Rhodri James
rho...@wildebst.demon.co.ukwrote:
I asked you not to top-post. Please put your replies *below* the
messages you're quoting, not above. It's much easier to understand
the conversation that we're having if you do that, and much more
aggravating if
from collections import defaultdict
d = defaultdict(set)
assert isinstance(d['a'], set)
assert isinstance(d.get('b'), set)
d['a'] is ok, and a new set object is insert to d, but d.get('b') won't.
It's a bug, or just a feature?
I think dict.get() method is just a *safe* version of dict[key],
Red Forks wrote:
from collections import defaultdict
d = defaultdict(set)
assert isinstance(d['a'], set)
assert isinstance(d.get('b'), set)
d['a'] is ok, and a new set object is insert to d, but d.get('b') won't.
It's a bug, or just a feature?
A feature.
I think dict.get() method is just a
On Thu, 21 May 2009 13:07:50 +0100, Red Forks redfo...@gmail.com wrote:
from collections import defaultdict
d = defaultdict(set)
assert isinstance(d['a'], set)
assert isinstance(d.get('b'), set)
d['a'] is ok, and a new set object is insert to d, but d.get('b') won't.
It's a bug, or just a
You mean 'get' method should not alter the dict, does 'dict[key]' should not
alter the dict either?
d = defaultdict(set)
assert len(d) == 0
print d[1]
assert len(d) == 1
auto insert value to dict, when value is not in dict, is what defaultdict
try to do.
On Fri, May 22, 2009 at 7:46 AM, Rhodri
Red Forks wrote:
You mean 'get' method should not alter the dict, does 'dict[key]' should
not alter the dict either?
d = defaultdict(set)
assert len(d) == 0
print d[1]
assert len(d) == 1
auto insert value to dict, when value is not in dict, is what
defaultdict try to do.
That's the
Please don't top-post, it makes the thread of argument hard to follow.
On Fri, 22 May 2009 01:44:37 +0100, Red Forks redfo...@gmail.com wrote:
You mean 'get' method should not alter the dict, does 'dict[key]' should
not
alter the dict either?
d = defaultdict(set)
assert len(d) == 0
print
