added SimpleCache

mps/simplecache.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+from time import time
+
+
+class SimpleCache:
+    def __init__(self, timeout, storage=None):
+        if storage is None:
+            storage = {}
+
+        self._cache = storage
+        self._timeout = timeout
+
+    def _generate_key(self, args):
+        key = u""
+        for arg in args:
+            key += str(arg)
+        return key
+
+    def get(self, *args):
+        key = self._generate_key(args)
+        print key
+        cache = self._cache.get(key, None)
+        # Not in cache
+        if cache is None:
+            print(self._cache)
+            return None
+
+        # Not valid anymore after timeout
+        if cache['created'] + self._timeout < time():
+            return None
+
+        return cache['data']
+
+    def save(self, data, *args):
+        key = self._generate_key(args)
+        print(key)
+        self._cache[key] = {'data': data, 'created': time()}

mps/test/test_simplecache.py

@@ -0,0 +1,12 @@
+from time import sleep
+
+from simplecache import SimpleCache
+
+def test_simple_cache():
+    cache = SimpleCache(0.1)
+
+    assert cache.get("hamster") == None
+    cache.save("yumyum", "hamster")
+    assert cache.get("hamster") == "yumyum"
+    sleep(0.1)
+    assert cache.get("hamster") == None