From c06b37a44055330328ba79d890d33c4e87536b00 Mon Sep 17 00:00:00 2001
From: Joe LeVeque <jleveque@users.noreply.github.com>
Date: Fri, 6 Oct 2017 14:28:19 -0700
Subject: [PATCH] Add sonic_psu module along with initial psu_base.py base
 class for plugins (#116)

---
 setup.py              |  2 +-
 sonic_psu/__init__.py |  0
 sonic_psu/psu_base.py | 26 ++++++++++++++++++++++++++
 3 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100644 sonic_psu/__init__.py
 create mode 100644 sonic_psu/psu_base.py

diff --git a/setup.py b/setup.py
index c4ee75816e57..37b1f8d7d619 100644
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,7 @@
     url='https://github.com/Azure/sonic-utilities',
     maintainer='Joe LeVeque',
     maintainer_email='jolevequ@microsoft.com',
-    packages=['config', 'sfputil', 'show', 'sonic_eeprom', 'sonic_sfp', "sonic_installer"],
+    packages=['config', 'sfputil', 'show', 'sonic_eeprom', 'sonic_installer', 'sonic_psu', 'sonic_sfp'],
     package_data={
         'show': ['aliases.ini']
     },
diff --git a/sonic_psu/__init__.py b/sonic_psu/__init__.py
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sonic_psu/psu_base.py b/sonic_psu/psu_base.py
new file mode 100644
index 000000000000..b20e6af2723f
--- /dev/null
+++ b/sonic_psu/psu_base.py
@@ -0,0 +1,26 @@
+#!/usr/bin/env python
+#
+# psu_base.py
+#
+# Abstract base class for implementing platform-specific
+#  PSU control functionality for SONiC
+#
+
+try:
+    import abc
+except ImportError, e:
+    raise ImportError (str(e) + " - required module not found")
+
+class PsuBase(object):
+    __metaclass__ = abc.ABCMeta
+
+    @abc.abstractmethod
+    def get_psu_status(self, index):
+        """
+        Retrieves the oprational status of power supply unit (PSU) defined
+                by index <index>
+
+        :param index: An integer, index of the PSU of which to query status
+        :return: Boolean, True if PSU is operating properly, False if PSU is faulty
+        """
+        return False