allow retrieval and pruning of contents by name

src/dir/directory.py

@@ -14,6 +14,22 @@ class Directory(ABC):
     def __iter__(self):
         return self.contents.__iter__()
 
+    def __getitem__(self, name):
+        for e in self:
+            if e.name == name:
+                return e
+        raise KeyError
+
+    def prune(self, name):
+        for e in self:
+            if e.name == name:
+                self.contents.remove(e)
+                return
+        raise KeyError
+
+    def __str__(self):
+        return self.name
+
     @property
     def name(self):
         return self.path.name