Revision 2652
Added by Aaron Marcuse-Kubitza about 12 years ago
| util.py | ||
|---|---|---|
| 1 | 1 |
# Useful functions and classes |
| 2 | 2 |
|
| 3 |
import collections |
|
| 4 |
|
|
| 5 |
import dicts |
|
| 3 | 6 |
import objects |
| 4 | 7 |
|
| 5 |
import collections |
|
| 6 |
|
|
| 7 | 8 |
#### Function wrappers for statements |
| 8 | 9 |
|
| 9 | 10 |
def noop(*args, **kw_args): pass |
| ... | ... | |
| 187 | 188 |
def have_same_value(dict_, *keys): |
| 188 | 189 |
return all_equal_ignore_none([dict_.get(k, None) for k in keys]) |
| 189 | 190 |
|
| 190 |
class DefaultDict(collections.defaultdict): |
|
| 191 |
class DefaultDict(dicts.DictProxy): |
|
| 192 |
'''Unlike collections.defaultdict, provides a view of the given dict instead |
|
| 193 |
of copying it.''' |
|
| 191 | 194 |
def __init__(self, dict_, default=None): |
| 192 |
collections.defaultdict.__init__(self, lambda: default, dict_) |
|
| 195 |
dicts.DictProxy.__init__(self, dict_) |
|
| 196 |
|
|
| 197 |
self.default = default |
|
| 198 |
|
|
| 199 |
def __getitem__(self, key): return self.inner.get(key, self.default) |
|
| 193 | 200 |
|
| 194 | 201 |
def dict_subset_right_join(dict_, keys): |
| 195 | 202 |
'''Gets a subset of a dict, using None for subset keys that don't exist''' |
Also available in: Unified diff
util.py: DefaultDict: Use dicts.DictProxy instead of collections.defaultdict so that it provides a view of the given dict instead of copying it