made widget compatible with qtile v 0.17

qtile/.config/qtile/Custom_Widgets.py

@@ -5,7 +5,7 @@ import re
 from libqtile import widget, bar
 
 #region Custom_Memory
-class MemoryC(widget.base.ThreadedPollText):
+class MemoryC(widget.base.ThreadPoolText):
     orientations = widget.base.ORIENTATION_HORIZONTAL
     defaults = [
         ("format", "{MemUsed}GB/{MemTotal}GB", "Formatting for field names."),
@@ -13,13 +13,9 @@ class MemoryC(widget.base.ThreadedPollText):
     ]
 
     def __init__(self, **config):
-        super().__init__(**config)
+        super().__init__("", **config)
         self.add_defaults(MemoryC.defaults)
 
-    def tick(self):
-        self.update(self.poll())
-        return self.update_interval
-
     def poll(self):
         mem = psutil.virtual_memory()
         swap = psutil.swap_memory()