1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
from functools import partial
try:
from collections.abc import Callable
except ImportError:
from collections import Callable
def call_or_pass(value, args, kwargs):
if isinstance(value, Callable):
return value(*args, **kwargs)
return value
class OptionProperty(object):
def __init__(self, name):
self.name = name
def __repr__(self):
return '<%s %r>' % (self.__class__.__name__, self.name)
def __get__(self, obj, cls):
return partial(self, obj)
def __set__(self, obj, value):
obj.opts[self.name] = value
def __call__(self, obj, *args, **kwargs):
# As a decorator.
if len(args) == 1 and not kwargs and isinstance(args[0], Callable):
obj.opts[self.name] = args[0]
return args[0]
else:
value = obj.opts.get(self.name)
return call_or_pass(value, args, kwargs)
|
