added 2 warning states, color support, support for user defined devisor, configurable rounding of byte values for mem module and fixed used memory calculation in mem module

i3pystatus/mem.py

@@ -1,8 +1,6 @@
 from i3pystatus import IntervalModule
 from psutil import virtual_memory
 
-MEGABYTE = 1024 * 1024
-
 
 class Mem(IntervalModule):
     """
@@ -18,19 +16,49 @@ class Mem(IntervalModule):
     Requires psutil (from PyPI)
     """
 
-    format = "{avail_mem} MB"
+    format = "{avail_mem} GB"
+    divisor = 1024 ** 3
+    color = "#00FF00"
+    warn_color = "#FFFF00"
+    alert_color = "#FF0000"
+    warn_percantage = 50
+    alert_percentage = 80
+    _round = 2
+
     settings = (
         ("format", "format string used for output."),
+        ("divisor",
+            "divide all byte values by this value, default 1024**2(mebibytes"),
+        ("warn_percantage", "minimal percantage for warn state"),
+        ("alert_percentage", "minimal percantage for alert state"),
+        ("color", "standard color"),
+        ("warn_color",
+            "defines the color used wann warn percentage ist exceeded"),
+        ("alert_color",
+            "defines the color used when alert percentage is exceeded"),
+        ("round", "round byte values to given length behind dot")
+
     )
 
     def run(self):
-        vm = virtual_memory()
-        # This follows the same algorithm used for vm-percent
-        used = vm.used - vm.cached
+        memory_usage = virtual_memory()
+        used = memory_usage.used - memory_usage.cached - memory_usage.buffers
+
+        if memory_usage.percent >= self.alert_percentage:
+            color = self.alert_color
+
+        elif memory_usage.percent >= self.warn_percantage:
+            color = self.warn_color
+
+        else:
+            color = self.color
+
         self.output = {
             "full_text": self.format.format(
-                used_mem=int(round(used / MEGABYTE, 0)),
-                avail_mem=int(round(vm.available / MEGABYTE, 0)),
-                total_mem=int(round(vm.total / MEGABYTE, 0)),
-                percent_used_mem=vm.percent)
+                used_mem=round(used / self.divisor, self._round),
+                avail_mem=round(memory_usage.available / self.divisor,
+                                self._round),
+                total_mem=round(memory_usage.total / self.divisor, self._round),
+                percent_used_mem=int(memory_usage.percent)),
+            "color":color
         }