Merge pull request #394 from salil-gtm/master

Number Of Processors for Linux Platform

README.rst

@@ -70,6 +70,7 @@ Text to speech                     X       X   X       X    X
 Unique ID                          X       X   X       X    X
 Vibrator                           X       X
 Wifi                                           X       X    X
+Number of Processors                                        X
 ================================== ======= === ======= ==== =====
 
 Support

plyer/__init__.py

@@ -9,7 +9,7 @@
            'compass', 'email', 'filechooser', 'flash', 'gps', 'gravity',
            'gyroscope', 'irblaster', 'light', 'orientation', 'notification',
            'proximity', 'sms', 'tts', 'uniqueid', 'vibrator', 'wifi',
-           'temperature', 'humidity', 'spatialorientation', 'brightness', 'storagepath')
+           'temperature', 'humidity', 'spatialorientation', 'brightness', 'storagepath','processors')
 
 __version__ = '1.3.1dev'
 
@@ -102,3 +102,6 @@
 
 #: StoragePath proxy to :class:`plyer.facades.StoragePath`
 storagepath = Proxy('storagepath', facades.StoragePath)
+
+#: Processors proxy to :class:`plyer.facades.Processors`
+processors = Proxy('processors', facades.Processors)

plyer/facades/__init__.py

@@ -10,7 +10,7 @@
            'Compass', 'Email', 'FileChooser', 'GPS', 'Gravity', 'Gyroscope',
            'IrBlaster', 'Light', 'Orientation', 'Notification', 'Proximity',
            'Sms', 'TTS', 'UniqueID', 'Vibrator', 'Wifi', 'Flash',
-           'Temperature', 'Humidity', 'SpatialOrientation', 'Brightness',
+           'Temperature', 'Humidity', 'SpatialOrientation', 'Brightness','Processors',
            'StoragePath', 'keystore')
 
 from plyer.facades.accelerometer import Accelerometer
@@ -42,3 +42,4 @@
 from plyer.facades.brightness import Brightness
 from plyer.facades.keystore import Keystore
 from plyer.facades.storagepath import StoragePath
+from plyer.facades.processors import Processors

plyer/facades/processors.py

@@ -0,0 +1,39 @@
+'''
+Number of Processors
+=======
+
+Simple Example
+---------------
+To get battery status::
+    >>> from plyer import processors
+    >>> processors.status
+    {'Number_of_Processors': '4'}
+Supported Platforms
+-------------------
+Linux
+'''
+
+
+class Processors(object):
+    '''
+    Number of Processors info facade.
+    '''
+
+    @property
+    def status(self):
+        '''
+        Property that contains a dict with the following fields:
+             * **Number_of_Processors** *(int)*: Number of Processors in the system
+            .. warning::
+                If any of the fields is not readable, it is set as
+                None.
+        '''
+        return self.get_state()
+
+    def get_state(self):
+        return self._get_state()
+
+    # private
+
+    def _get_state(self):
+	raise NotImplementedError()

plyer/platforms/linux/processors.py

@@ -0,0 +1,37 @@
+from subprocess import Popen, PIPE
+from plyer.facades import Processors
+from plyer.utils import whereis_exe
+
+from os import environ
+
+
+class LinuxProcessors(Processors):
+    def _get_state(self):
+        old_lang = environ.get('LANG')
+        environ['LANG'] = 'C'
+
+        status = {"Number_of_Processors": None}
+
+	dev = "--all"
+        nproc_process = Popen(
+            ["nproc", dev],
+            stdout=PIPE
+        )
+        output = nproc_process.communicate()[0]
+
+        environ['LANG'] = old_lang
+
+        if not output:
+            return status
+
+        status['Number_of_Processors'] = output.rstrip()
+
+        return status
+
+
+def instance():
+    import sys
+    if whereis_exe('nproc'):
+        return LinuxProcessors()
+    sys.stderr.write("nproc not found.")
+    return Processors()