Fixed Google Colab link in week 3 day 4, and latest week 8 updates

week8_wip/agents/ensemble_agent.py

@@ -0,0 +1,29 @@
+import pandas as pd
+from sklearn.linear_model import LinearRegression
+import joblib
+
+from agents.specialist_agent import SpecialistAgent
+from agents.frontier_agent import FrontierAgent
+from agents.random_forest_agent import RandomForestAgent
+
+class EnsembleAgent:
+
+    def __init__(self, collection):
+        self.specialist = SpecialistAgent()
+        self.frontier = FrontierAgent(collection)
+        self.random_forest = RandomForestAgent()
+        self.model = joblib.load('ensemble_model.pkl')
+
+    def price(self, description):
+        specialist = self.specialist.price(description)
+        frontier = self.frontier.price(description)
+        random_forest = self.random_forest.price(description)
+        X = pd.DataFrame({
+            'Specialist': [specialist],
+            'Frontier': [frontier],
+            'RandomForest': [random_forest],
+            'Min': [min(specialist, frontier, random_forest)],
+            'Max': [max(specialist, frontier, random_forest)],
+        })
+        y = self.model.predict(X)
+        return y[0]