dp func oper

Author: diegoami

06-dp-1class-func/dp_func_4.py

@@ -0,0 +1,19 @@
+from strategy_best2 import Customer, LineItem, Order, best_promo, fidelity_promo, bulk_item_promo, large_order_promo
+
+joe = Customer('John Doe', 0)  # <1>
+ann = Customer('Ann Smith', 1100)
+cart = [LineItem('banana', 4, .5),  # <2>
+    LineItem('apple', 10, 1.5),
+    LineItem('watermellon', 5, 5.0)]
+print(Order(joe, cart, fidelity_promo))
+print(Order(ann, cart, fidelity_promo))
+banana_cart = [LineItem('banana', 30, .5), LineItem('apple', 10, 1.5)]
+print(Order(joe, banana_cart, bulk_item_promo))  # <6>
+
+long_order = [LineItem(str(item_code), 1, 1.0) for item_code in range(10)]
+print(Order(joe, long_order, large_order_promo))
+print(Order(joe, cart, large_order_promo))
+
+print(Order(joe, long_order, best_promo))
+print(Order(joe, banana_cart, best_promo))
+print(Order(ann, cart, best_promo))

06-dp-1class-func/oper_1.py

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+from operator import itemgetter
+
+def sort_by_key(sequence, key):
+    return sorted(sequence, key=key)
+
+if __name__ == "__main__":
+    from multiprocessing import Pool
+
+    items = [([(1,2),(4,1)], itemgetter(1)),
+             ([(5,3),(2,7)], itemgetter(0))]
+
+    with Pool(5) as p:
+        result = p.starmap(sort_by_key, items)
+    print(result)