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Diffstat (limited to 'lib/python2.7/site-packages/sqlalchemy_migrate-0.7.2-py2.7.egg/migrate/versioning/util/keyedinstance.py')
-rwxr-xr-xlib/python2.7/site-packages/sqlalchemy_migrate-0.7.2-py2.7.egg/migrate/versioning/util/keyedinstance.py36
1 files changed, 0 insertions, 36 deletions
diff --git a/lib/python2.7/site-packages/sqlalchemy_migrate-0.7.2-py2.7.egg/migrate/versioning/util/keyedinstance.py b/lib/python2.7/site-packages/sqlalchemy_migrate-0.7.2-py2.7.egg/migrate/versioning/util/keyedinstance.py
deleted file mode 100755
index 3f6cb916..00000000
--- a/lib/python2.7/site-packages/sqlalchemy_migrate-0.7.2-py2.7.egg/migrate/versioning/util/keyedinstance.py
+++ /dev/null
@@ -1,36 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-class KeyedInstance(object):
- """A class whose instances have a unique identifier of some sort
- No two instances with the same unique ID should exist - if we try to create
- a second instance, the first should be returned.
- """
-
- _instances = dict()
-
- def __new__(cls, *p, **k):
- instances = cls._instances
- clskey = str(cls)
- if clskey not in instances:
- instances[clskey] = dict()
- instances = instances[clskey]
-
- key = cls._key(*p, **k)
- if key not in instances:
- instances[key] = super(KeyedInstance, cls).__new__(cls)
- return instances[key]
-
- @classmethod
- def _key(cls, *p, **k):
- """Given a unique identifier, return a dictionary key
- This should be overridden by child classes, to specify which parameters
- should determine an object's uniqueness
- """
- raise NotImplementedError()
-
- @classmethod
- def clear(cls):
- # Allow cls.clear() as well as uniqueInstance.clear(cls)
- if str(cls) in cls._instances:
- del cls._instances[str(cls)]