Sheffield | 25-SDC-Nov | Hassan Osman | Sprint 2 | Implement an LRU cache in Python

Sprint-2/implement_lru_cache/lru_cache.py

@@ -0,0 +1,27 @@
+from collections import OrderedDict
+
+class LruCache:
+    def __init__(self, limit):
+        if limit <= 0:
+            raise ValueError("Limit must be greater than zero")
+        self.limit = limit
+        self.cache = OrderedDict()
+
+
+    def set(self, key, value):
+        if key in self.cache:
+            self.cache.move_to_end(key)
+        else:
+            if len(self.cache) >= self.limit:
+                self.cache.popitem(last=False)
+
+        self.cache[key] = value
+
+
+
+    def get(self, key):
+        if key in self.cache:
+            self.cache.move_to_end(key)
+            return self.cache[key]
+        else:
+            return None