ex 1.4

pcost.py

@@ -1,17 +1,19 @@
-from decimal import Decimal
 
-
-def run(filename: str) -> Decimal:
+def portfolio_cost(filename: str) -> float:
     with open(filename, 'r') as lines:
-        total = Decimal(0.0)
-        _, count, price = lines.readline().split()
-        count = Decimal(count)
-        price = Decimal(price)
-        total += count * price
+        total = 0.0
+        for line in lines:
+            _, count, price = line.split()
+            try:
+                count = int(count)
+                price = float(price)
+                total += count * price
+            except ValueError as ex:
+                print(f"Couldn't parse {line!r}. Reason: {ex!r}")
     return total
 
 
 if __name__ == '__main__':
     filename = 'Data/portfolio.dat'
-    value = run(filename)
+    value = portfolio_cost(filename)
     print(f"value = {value}")