How to use the singledispatch.WeakKeyDictionary function in singledispatch

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github ambv / singledispatch / test_singledispatch.py View on Github external
def __init__(self, *args, **kwargs):
                super(TracingDict, self).__init__(*args, **kwargs)
                self.set_ops = []
                self.get_ops = []
            def __getitem__(self, key):
                result = self.data[key]
                self.get_ops.append(key)
                return result
            def __setitem__(self, key, value):
                self.set_ops.append(key)
                self.data[key] = value
            def clear(self):
                self.data.clear()
        _orig_wkd = functools.WeakKeyDictionary
        td = TracingDict()
        functools.WeakKeyDictionary = lambda: td
        c = collections
        @functools.singledispatch
        def g(arg):
            return "base"
        d = {}
        l = []
        self.assertEqual(len(td), 0)
        self.assertEqual(g(d), "base")
        self.assertEqual(len(td), 1)
        self.assertEqual(td.get_ops, [])
        self.assertEqual(td.set_ops, [dict])
        self.assertEqual(td.data[dict], g.registry[object])
        self.assertEqual(g(l), "base")
        self.assertEqual(len(td), 2)
        self.assertEqual(td.get_ops, [])
        self.assertEqual(td.set_ops, [dict, list])
github ambv / singledispatch / test_singledispatch.py View on Github external
c.MutableSet.register(X)       # Will invalidate the cache.
        self.assertEqual(len(td), 2)   # Stale cache.
        self.assertEqual(g(l), "list")
        self.assertEqual(len(td), 1)
        g.register(c.MutableMapping, lambda arg: "mutablemapping")
        self.assertEqual(len(td), 0)
        self.assertEqual(g(d), "mutablemapping")
        self.assertEqual(len(td), 1)
        self.assertEqual(g(l), "list")
        self.assertEqual(len(td), 2)
        g.register(dict, lambda arg: "dict")
        self.assertEqual(g(d), "dict")
        self.assertEqual(g(l), "list")
        g._clear_cache()
        self.assertEqual(len(td), 0)
        functools.WeakKeyDictionary = _orig_wkd
github ambv / singledispatch / test_singledispatch.py View on Github external
from collections import UserDict
        class TracingDict(UserDict):
            def __init__(self, *args, **kwargs):
                super(TracingDict, self).__init__(*args, **kwargs)
                self.set_ops = []
                self.get_ops = []
            def __getitem__(self, key):
                result = self.data[key]
                self.get_ops.append(key)
                return result
            def __setitem__(self, key, value):
                self.set_ops.append(key)
                self.data[key] = value
            def clear(self):
                self.data.clear()
        _orig_wkd = functools.WeakKeyDictionary
        td = TracingDict()
        functools.WeakKeyDictionary = lambda: td
        c = collections
        @functools.singledispatch
        def g(arg):
            return "base"
        d = {}
        l = []
        self.assertEqual(len(td), 0)
        self.assertEqual(g(d), "base")
        self.assertEqual(len(td), 1)
        self.assertEqual(td.get_ops, [])
        self.assertEqual(td.set_ops, [dict])
        self.assertEqual(td.data[dict], g.registry[object])
        self.assertEqual(g(l), "base")
        self.assertEqual(len(td), 2)

singledispatch

Backport functools.singledispatch to older Pythons.

MIT
Latest version published 8 months ago

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