Create greedy.py (#1359)

* Create greedy.py

* Update greedy.py

* Add a doctest and format with black

* Update build_directory_md.py

other/greedy.py

@@ -0,0 +1,63 @@
+class things:
+    def __init__(self, n, v, w):
+        self.name = n
+        self.value = v
+        self.weight = w
+
+    def __repr__(self):
+        return f"{self.__class__.__name__}({self.name}, {self.value}, {self.weight})"
+
+    def get_value(self):
+        return self.value
+
+    def get_name(self):
+        return self.name
+
+    def get_weight(self):
+        return self.weight
+
+    def value_Weight(self):
+        return self.value / self.weight
+
+
+def build_menu(name, value, weight):
+    menu = []
+    for i in range(len(value)):
+        menu.append(things(name[i], value[i], weight[i]))
+    return menu
+
+
+def greedy(item, maxCost, keyFunc):
+    itemsCopy = sorted(item, key=keyFunc, reverse=True)
+    result = []
+    totalValue, total_cost = 0.0, 0.0
+    for i in range(len(itemsCopy)):
+        if (total_cost + itemsCopy[i].get_weight()) <= maxCost:
+            result.append(itemsCopy[i])
+            total_cost += itemsCopy[i].get_weight()
+            totalValue += itemsCopy[i].get_value()
+    return (result, totalValue)
+
+
+def test_greedy():
+    """
+    >>> food = ["Burger", "Pizza", "Coca Cola", "Rice",
+    ...         "Sambhar", "Chicken", "Fries", "Milk"]
+    >>> value = [80, 100, 60, 70, 50, 110, 90, 60]
+    >>> weight = [40, 60, 40, 70, 100, 85, 55, 70]
+    >>> foods = build_menu(food, value, weight)
+    >>> foods  # doctest: +NORMALIZE_WHITESPACE
+    [things(Burger, 80, 40), things(Pizza, 100, 60), things(Coca Cola, 60, 40),
+     things(Rice, 70, 70), things(Sambhar, 50, 100), things(Chicken, 110, 85),
+     things(Fries, 90, 55), things(Milk, 60, 70)]
+    >>> greedy(foods, 500, things.get_value)  # doctest: +NORMALIZE_WHITESPACE
+    ([things(Chicken, 110, 85), things(Pizza, 100, 60), things(Fries, 90, 55),
+      things(Burger, 80, 40), things(Rice, 70, 70), things(Coca Cola, 60, 40),
+      things(Milk, 60, 70)], 570.0)
+    """
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()

scripts/build_directory_md.py

@@ -25,7 +25,7 @@ def print_path(old_path: str, new_path: str) -> str:
     for i, new_part in enumerate(new_path.split(os.sep)):
         if i + 1 > len(old_parts) or old_parts[i] != new_part:
             if new_part:
-                print(f"{md_prefix(i-1)} {new_part.replace('_', ' ').title()}")
+                print(f"{md_prefix(i)} {new_part.replace('_', ' ').title()}")
     return new_path
 
 
@@ -36,9 +36,7 @@ def print_directory_md(top_dir: str = ".") -> None:
         if filepath != old_path:
             old_path = print_path(old_path, filepath)
         indent = (filepath.count(os.sep) + 1) if filepath else 0
-        url = "/".join((URL_BASE, filepath.split(os.sep)[1], filename)).replace(
+        url = "/".join((URL_BASE, filepath, filename)).replace(" ", "%20")
-            " ", "%20"
-        )
         filename = os.path.splitext(filename.replace("_", " "))[0]
         print(f"{md_prefix(indent)} [{filename}]({url})")