Minor modernizing of i3wrapper

local/bin/i3wrapper.py

@@ -1,54 +1,56 @@
 #!/usr/bin/env python
 import json
 import os
-import subprocess
 import sys
 
+__all__ = ["_mem", "_backlight", "_hwtemp"]
+
 _BITS = []
 
 
 def _bit(idx):
     def wrapper(func):
-        _BITS.append([idx, func.__name__.replace('_', ''), func])
+        _BITS.append([idx, func.__name__.replace("_", ""), func])
         return func
+
     return wrapper
 
 
 @_bit(6)
 def _mem():
-    with open('/proc/meminfo') as meminfo_fp:
+    with open("/proc/meminfo") as meminfo_fp:
         attrs = {}
         for line in meminfo_fp.readlines():
-            parts = line.split(':', 2)
+            parts = line.split(":", 2)
             attrs[parts[0].strip()] = parts[1].strip()
-        avail = int(attrs['MemAvailable'].split()[0])
-        total = int(attrs['MemTotal'].split()[0])
+        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'
+            color = "#ff0000"
         if used < 25:
-            color = '#00ff00'
-        return 'M:{}%'.format(used), color
+            color = "#00ff00"
+        return "M:{}%".format(used), color
 
 
 @_bit(0)
-def _backlight(dev_dir='/sys/class/backlight/intel_backlight'):
-    with open('{}/brightness'.format(dev_dir)) as br_fp:
-        with open('{}/max_brightness'.format(dev_dir)) as mb_fp:
+def _backlight(dev_dir="/sys/class/backlight/intel_backlight"):
+    with open("{}/brightness".format(dev_dir)) as br_fp:
+        with open("{}/max_brightness".format(dev_dir)) as mb_fp:
             value = int(br_fp.read().strip())
             max_value = int(mb_fp.read().strip())
             pct = int(float(float(value) / float(max_value)) * 100)
             color = None
             if pct >= 75:
-                color = '#ffaa00'
+                color = "#ffaa00"
             if pct <= 25:
-                color = '#5599ff'
-            return '☼:{}%'.format(pct), color
+                color = "#5599ff"
+            return "☼:{}%".format(pct), color
 
 
-THINKFAN_CONF = '/etc/thinkfan.conf'
-ACPI_IBM_FAN = '/proc/acpi/ibm/fan'
+THINKFAN_CONF = "/etc/thinkfan.conf"
+ACPI_IBM_FAN = "/proc/acpi/ibm/fan"
 
 
 @_bit(7)
@@ -58,40 +60,40 @@ def _hwtemp(conf=THINKFAN_CONF, fan=ACPI_IBM_FAN):
 
     temps = []
 
-    with open('/etc/thinkfan.conf') as tfc_fp:
+    with open("/etc/thinkfan.conf") as tfc_fp:
         for line in tfc_fp.readlines():
-            if not line.startswith('hwmon '):
+            if not line.startswith("hwmon "):
                 continue
             try:
-                with open(line.split(' ')[1].strip()) as temp_fp:
+                with open(line.split(" ")[1].strip()) as temp_fp:
                     temps.append(float(temp_fp.read()))
             except (OSError, IOError) as exc:
-                sys.stderr.write(str(exc) + '\n')
+                sys.stderr.write(str(exc) + "\n")
 
     avg_temp = float(sum(temps)) / len(temps) / 1000.0
     color = None
 
-    fan_level = 'unset'
+    fan_level = "unset"
     try:
         with open(fan) as fan_fp:
             for line in fan_fp.readlines():
-                if not line.startswith('level:\t\t'):
+                if not line.startswith("level:\t\t"):
                     continue
-                fan_level = int(line.replace('level:\t\t', ''))
+                fan_level = int(line.replace("level:\t\t", ""))
     except (OSError, IOError) as exc:
-        sys.stderr.write(str(exc) + '\n')
+        sys.stderr.write(str(exc) + "\n")
 
     if avg_temp > 75:
-        color = '#ff0000'
+        color = "#ff0000"
     if avg_temp >= 50:
-        color = '#ffaa00'
+        color = "#ffaa00"
     if avg_temp <= 25:
-        color = '#5599ff'
-    return 'T:{:.1f}°C L:{}'.format(avg_temp, fan_level), color
+        color = "#5599ff"
+    return "T:{:.1f}°C L:{}".format(avg_temp, fan_level), color
 
 
 def _print_line(message):
-    sys.stdout.write(message + '\n')
+    sys.stdout.write(message + "\n")
     sys.stdout.flush()
 
 
@@ -110,9 +112,9 @@ def main(bits=_BITS):
     _print_line(_read_line())
 
     while True:
-        line, prefix = _read_line(), ''
-        if line.startswith(','):
-            line, prefix = line[1:], ','
+        line, prefix = _read_line(), ""
+        if line.startswith(","):
+            line, prefix = line[1:], ","
 
         loaded = json.loads(line)
         for idx, name, func in bits:
@@ -127,11 +129,11 @@ def main(bits=_BITS):
 
                 loaded.insert(idx, record)
             except Exception as exc:
-                sys.stderr.write(str(exc) + '\n')
+                sys.stderr.write(str(exc) + "\n")
                 sys.stderr.flush()
 
         _print_line(prefix + json.dumps(loaded))
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     main()