due: Make due() searching more sane

due.py

@@ -54,17 +54,10 @@ def add(tag, date_input, desc):
     subprocess.call(["todo.sh", "add", desc, tag + ":" + date])
 
 def due(search_term="", relative=False):
-    command = ["todo.sh", "list"]
-    command.append(search_term)
+    tagList = "\|".join(TAGS)
+    command = ["todo.sh", "list", tagList, search_term]
     lines = subprocess.check_output(command).decode(encoding='UTF-8').split('\n')
-    items = []
-
-    for line in lines:
-        if " t:" in line:
-            item = todo_item(line)
-            if item.date is not None:
-                items.append(item)
-
+    items =  [item for item in [todo_item(line) for line in lines] if item.date is not None]
     items.sort(key= lambda x: x.date)
 
     for i in items: