Merge pull request #14 from adafruit/patch-fix

Linted

Author: dhalbert

adafruit_matrixkeypad.py

@@ -62,15 +62,15 @@ def pressed_keys(self):
             pin.direction = Direction.INPUT
             pin.pull = Pull.UP
 
-        for row in range(len(self.row_pins)):
+        for row, row_pin in enumerate(self.row_pins):
             # set one row low at a time
-            self.row_pins[row].direction = Direction.OUTPUT
-            self.row_pins[row].value = False
+            row_pin.direction = Direction.OUTPUT
+            row_pin.value = False
             # check the column pins, which ones are pulled down
-            for col in range(len(self.col_pins)):
-                if not self.col_pins[col].value:
+            for col, val in enumerate(self.col_pins):
+                if not val.value:
                     pressed.append(self.keys[row][col])
             # reset the pin to be an input
-            self.row_pins[row].direction = Direction.INPUT
-            self.row_pins[row].pull = Pull.UP
+            row_pin.direction = Direction.INPUT
+            row_pin.pull = Pull.UP
         return pressed