Remove _meta_schemas since we can just pluck these off.

IValidator.META_SCHEMA should have its own uri, and all known validators are
already stored in meta_schemas.

Closes #87

When annoyed, sidestep the problem.

Author: Julian

jsonschema.py

@@ -988,10 +988,15 @@ def __init__(
         self.base_uri = base_uri
         self.resolution_scope = base_uri
         self.referrer = referrer
-        self.store = _URIDict(store, **_meta_schemas())
         self.cache_remote = cache_remote
         self.handlers = dict(handlers)
 
+        self.store = _URIDict(
+            (id, validator.META_SCHEMA)
+            for id, validator in iteritems(meta_schemas)
+        )
+        self.store.update(store)
+
     @classmethod
     def from_schema(cls, schema, *args, **kwargs):
         """
@@ -1165,16 +1170,6 @@ def total_errors(self):
         return len(self.errors) + child_errors
 
 
-def _meta_schemas():
-    """
-    Collect the urls and meta schemas from each known validator.
-
-    """
-
-    meta_schemas = (v.META_SCHEMA for v in validators.values())
-    return dict((urlparse.urldefrag(m["id"])[0], m) for m in meta_schemas)
-
-
 def _find_additional_properties(instance, schema):
     """
     Return the set of additional properties for the given ``instance``.