Class CachedSpamManager

src/8/creating_cached_instances/example2.py:3–12

import weakref

class CachedSpamManager:
    def __init__(self):
        self._cache = weakref.WeakValueDictionary()
    def get_spam(self, name):
        if name not in self._cache:
            s = Spam(name)
            self._cache[name] = s
        else:
            s = self._cache[name]
        return s
      
class Spam:
    def __init__(self, name):