Remove unused file.

segpy/caching.py

@@ -1,48 +0,0 @@
-def lfu_cache(maxsize=100):
-    '''Least-frequently-used cache decorator.
-
-    Arguments to the cached function must be hashable.
-    Cache performance statistics stored in f.hits and f.misses.
-    Clear the cache with f.clear().
-    http://en.wikipedia.org/wiki/Least_Frequently_Used
-
-    '''
-    def decorating_function(user_function):
-        cache = {}                      # mapping of args to results
-        use_count = Counter()           # times each key has been accessed
-        kwd_mark = object()             # separate positional and keyword args
-
-        @functools.wraps(user_function)
-        def wrapper(*args, **kwds):
-            key = args
-            if kwds:
-                key += (kwd_mark,) + tuple(sorted(kwds.items()))
-            use_count[key] += 1
-
-            # get cache entry or compute if not found
-            try:
-                result = cache[key]
-                wrapper.hits += 1
-            except KeyError:
-                result = user_function(*args, **kwds)
-                cache[key] = result
-                wrapper.misses += 1
-
-                # purge least frequently used cache entry
-                if len(cache) > maxsize:
-                    for key, _ in nsmallest(maxsize // 10,
-                                            use_count.iteritems(),
-                                            key=itemgetter(1)):
-                        del cache[key], use_count[key]
-
-            return result
-
-        def clear():
-            cache.clear()
-            use_count.clear()
-            wrapper.hits = wrapper.misses = 0
-
-        wrapper.hits = wrapper.misses = 0
-        wrapper.clear = clear
-        return wrapper
-    return decorating_function