feat: Add new gcloud commands, API clients, and third-party libraries across various services.

gcloud auth application-default login/google-cloud-sdk/lib/third_party/cachetools/lfu.py

@@ -0,0 +1,35 @@
+from __future__ import absolute_import
+
+import collections
+
+from .cache import Cache
+
+
+class LFUCache(Cache):
+  """Least Frequently Used (LFU) cache implementation."""
+
+  def __init__(self, maxsize, getsizeof=None):
+    Cache.__init__(self, maxsize, getsizeof)
+    self.__counter = collections.Counter()
+
+  def __getitem__(self, key, cache_getitem=Cache.__getitem__):
+    value = cache_getitem(self, key)
+    self.__counter[key] -= 1
+    return value
+
+  def __setitem__(self, key, value, cache_setitem=Cache.__setitem__):
+    cache_setitem(self, key, value)
+    self.__counter[key] -= 1
+
+  def __delitem__(self, key, cache_delitem=Cache.__delitem__):
+    cache_delitem(self, key)
+    del self.__counter[key]
+
+  def popitem(self):
+    """Remove and return the `(key, value)` pair least frequently used."""
+    try:
+      (key, _), = self.__counter.most_common(1)
+    except ValueError:
+      raise KeyError('%s is empty' % self.__class__.__name__)
+    else:
+      return (key, self.pop(key))