mirror of
https://github.com/jlu5/PyLink.git
synced 2024-12-18 08:02:51 +01:00
20 lines
600 B
Python
20 lines
600 B
Python
"""
|
|
structures.py - PyLink data structures module.
|
|
|
|
This module contains custom data structures that may be useful in various situations.
|
|
"""
|
|
|
|
import collections
|
|
|
|
class KeyedDefaultdict(collections.defaultdict):
|
|
"""
|
|
Subclass of defaultdict allowing the key to be passed to the default factory.
|
|
"""
|
|
def __missing__(self, key):
|
|
if self.default_factory is None:
|
|
# If there is no default factory, just let defaultdict handle it
|
|
super().__missing__(self, key)
|
|
else:
|
|
value = self[key] = self.default_factory(key)
|
|
return value
|