summaryrefslogtreecommitdiffstats
path: root/Lib/idlelib/Delegator.py
blob: 93253b9fbc2107fd7055b02e10439031a32c088c (plain)
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
class Delegator:

    # The cache is only used to be able to change delegates!

    def __init__(self, delegate=None):
        self.delegate = delegate
        self.__cache = {}

    def __getattr__(self, name):
        attr = getattr(self.delegate, name) # May raise AttributeError
        setattr(self, name, attr)
        self.__cache[name] = attr
        return attr

    def resetcache(self):
        for key in self.__cache:
            try:
                delattr(self, key)
            except AttributeError:
                pass
        self.__cache.clear()

    def cachereport(self):
        keys = list(self.__cache.keys())
        keys.sort()
        print(keys)

    def setdelegate(self, delegate):
        self.resetcache()
        self.delegate = delegate

    def getdelegate(self):
        return self.delegate