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-rw-r--r--pym/_emerge/__init__.py23
1 files changed, 23 insertions, 0 deletions
diff --git a/pym/_emerge/__init__.py b/pym/_emerge/__init__.py
index 8ce5d1969..7b6dc6e40 100644
--- a/pym/_emerge/__init__.py
+++ b/pym/_emerge/__init__.py
@@ -1446,6 +1446,29 @@ class _PackageMetadataWrapper(object):
except KeyError:
return default
+ def __contains__(self, k):
+ return hasattr(self, "_val_" + k)
+
+ def pop(self, key, *args):
+ if len(args) > 1:
+ raise TypeError("pop expected at most 2 arguments, got " + \
+ repr(1 + len(args)))
+ try:
+ value = self[key]
+ except KeyError:
+ if args:
+ return args[0]
+ raise
+ del self[key]
+ return value
+
+ def clear(self):
+ for k in self._keys:
+ try:
+ delattr(self, "_val_" + k)
+ except AttributError:
+ pass
+
def _set_inherited(self, k, v):
if isinstance(v, basestring):
v = frozenset(v.split())