Getting silly with i3status wrapping

i3/config

@@ -130,5 +130,5 @@ bindsym $mod+r mode "resize"
 # Start i3bar to display a workspace bar (plus the system information i3status
 # finds out, if available)
 bar {
-        status_command i3status
+        status_command "i3status | python ~/.i3wrapper.py"
 }

i3status.conf

@@ -3,6 +3,7 @@
 general {
   colors = true
   interval = 5
+  output_format = "i3bar"
 }
 
 order += "volume master"

i3wrapper.py

@@ -0,0 +1,70 @@
+#!/usr/bin/env python
+import sys
+import json
+
+_BITS = []
+
+
+def _bit(idx, name):
+    def wrapper(func):
+        _BITS.append([idx, name, func])
+        return func
+    return wrapper
+
+
+@_bit(6, 'mem')
+def _mem():
+    with open('/proc/meminfo') as meminfo_fp:
+        attrs = {}
+        for line in meminfo_fp.readlines():
+            parts = line.split(':', 2)
+            attrs[parts[0].strip()] = parts[1].strip()
+        avail = int(attrs['MemAvailable'].split()[0])
+        total = int(attrs['MemTotal'].split()[0])
+        used = int(((total - avail) / total) * 100)
+        color = None
+        if used > 75:
+            color = '#ff0000'
+        if used < 25:
+            color = '#00ff00'
+        return 'M:{}%'.format(used), color
+
+
+def _print_line(message):
+    sys.stdout.write(message + '\n')
+    sys.stdout.flush()
+
+
+def _read_line():
+    try:
+        line = sys.stdin.readline().strip()
+        if not line:
+            sys.exit(3)
+        return line
+    except KeyboardInterrupt:
+        sys.exit()
+
+
+def main(bits=_BITS):
+    _print_line(_read_line())
+    _print_line(_read_line())
+
+    while True:
+        line, prefix = _read_line(), ''
+        if line.startswith(','):
+            line, prefix = line[1:], ','
+
+        loaded = json.loads(line)
+        for idx, name, func in bits:
+            value, color = func()
+            record = dict(full_text=str(value), name=name)
+            if color is not None:
+                record.update(dict(color=color))
+
+            loaded.insert(idx, record)
+
+        _print_line(prefix+json.dumps(loaded))
+
+
+if __name__ == '__main__':
+    main()