x/tuskar
Code Issues Proposed changes

Remove diff_items utility method

Browse Source 
This was originally introduced in the Icehouse cycle and is no longer
used in Tuskar.

Change-Id: I104e046a3a12c6b379fb555d506d076d77a1ea7b
This commit is contained in:
Dougal Matthews 2014-08-06 16:56:33 +01:00
parent a5483e83a4
commit 6d96351b37
1 changed files with 0 additions and 21 deletions
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21
tuskar/common/utils.py
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@ -91,24 +91,3 @@ def read_cached_file(filename, cache_info, reload_func=None):
if reload_func:
reload_func(cache_info['data'])
return cache_info['data']
def diff_items(old, new, key=None):
"""Calculates a difference between two collections of items.
Returns a tuple of two lists, the first contains all the items from
the ``new`` collection that are not in the ``old`` collection, the
second all the items from the ``old`` collection that are not in the
``new`` collection. The order of items is preserved.
If an optional ``key`` function is specified, it is used to compare
the items, instead of comparing them directly. That function may be
called multiple times, so it should have no side effects.
"""
if key is None:
key = lambda item: item
old_keys = set(key(item) for item in old)
new_keys = set(key(item) for item in new)
added = [item for item in new if key(item) not in old_keys]
removed = [item for item in old if key(item) not in new_keys]
return added, removed