curses gui: exclude "idle" from named cpu utils

(on the right side, e.g., » user: 11.10%    iowait:11.10% « )

curses_display.py

@@ -174,7 +174,7 @@ def display(measurement):
         # user/system
         #stdscr.addstr(y, LABEL_CPU_USER+6, '{0:.2%}'.format( cpu.user/100.0 ), curses.color_pair(3))
         #stdscr.addstr(y, LABEL_CPU_SYSTEM+8, '{0:.2%}'.format( cpu.system/100.0 ), curses.color_pair(3))
-        cpu_sorted = helpers.sort_named_tuple(cpu)
+        cpu_sorted = helpers.sort_named_tuple(cpu, skip="idle")
         t = '{0: <6}'.format( CPU_TYPE_LABELS[cpu_sorted[0][0]] )
         stdscr.addstr(y, LABEL_CPU_USER, t, curses.color_pair(4))
         stdscr.addstr("{:.2%}".format(cpu_sorted[0][1]/100), curses.color_pair(3))

helpers.py

@@ -179,5 +179,17 @@ def get_sysinfo():
     return ret
 
 
-def sort_named_tuple(data):
-    return sorted( data._asdict().items() , key=operator.itemgetter(1), reverse=True)
+def sort_named_tuple(data, skip=None):
+    """
+    Sort a named tuple by its values.
+
+    With |skip| a value can be specified that is excluded from the result.
+    """
+
+    d = data._asdict()
+
+    # NOTE: Possible improvement: Accept a list in skip?
+    if ( skip ):
+        del d[skip]
+
+    return sorted( d.items() , key=operator.itemgetter(1), reverse=True)