master > master: code py - algorithmen für rucksackproblem

code/python/src/models/stacks/stack.py

@@ -39,6 +39,13 @@ class Stack:
     def __contains__(self, value: Any) -> bool:
         return value in self.elements;
 
+    def __iter__(self) -> Generator[Any, None, None]:
+        for value in self.elements:
+            yield value;
+
+    def __str__(self) -> str:
+        return ', '.join([str(value) for value in self.elements[::-1]]);
+
     def push(self, value: Any):
         '''
         add element to stack
@@ -68,3 +75,6 @@ class Stack:
         checks if element in stack:
         '''
         return element in self.elements;
+
+    def empty(self) -> bool:
+        return len(self) == 0;