Done 6.3

altvec · altvec · commit c8e5a1add511 · 2020-07-06T00:56:04.000+05:00
diff --git a/Work/portfolio.py b/Work/portfolio.py
@@ -5,6 +5,15 @@ def __init__(self, holdings):
     def __iter__(self):
         return self._holdings.__iter__()
     
+    def __len__(self):
+        return len(self._holdings)
+
+    def __getitem__(self, index):
+        return self._holdings[index]
+
+    def __contains__(self, name):
+        return any([s.name == name for s in self._holdings])
+
     @property
     def total_cost(self):
         return sum([s.cost for s in self._holdings])
