Update documentation and add python API documentation

Change-Id: Ibccf5b6a5fba81cea42e04a022deac8a3207b9b8


[ROCm/rocm_smi_lib commit: 50a079af0f]

projects/rocm-smi-lib/docs/python_tutorials.rst

@@ -0,0 +1,29 @@
+====================
+Python Tutorials
+====================
+
+This chapter is the rocm_smi Python api tutorials.
+
+.. code-block:: python
+
+    import sys
+    sys.path.append("/opt/rocm/libexec/rocm_smi/")
+    try:
+        import rocm_smi
+    except ImportError:
+        raise ImportError("Could not import /opt/rocm/libexec/rocm_smi/rocm_smi.py")
+
+    class prof_utils:
+        def __init__(self, mode) -> None:
+            rocm_smi.initializeRsmi()
+
+        def getPower(self, device):
+            return rocm_smi.getPower(device)
+
+        def listDevices(self):
+            return rocm_smi.listDevices()
+
+        def getMemInfo(self, device):
+            (memUsed, memTotal) = rocm_smi.getMemInfo(device, "vram")
+            return round(float(memUsed)/float(memTotal) * 100, 2)
+