Refine runtime feature discovery python API and add documentation to …

…Python API docs

docs/api/python/index.md

@@ -157,6 +157,17 @@ Code examples are placed throughout the API documentation and these can be run a
    rtc/rtc.md
 ```
 
+## Run-Time Feature detection / Library Info
+
+```eval_rst
+.. toctree::
+   :maxdepth: 1
+
+   libinfo/libinfo.md
+```
+
+
+
 ## Symbol API
 
 ```eval_rst

docs/api/python/libinfo/libinfo.md

@@ -0,0 +1,70 @@
+# Run-Time Feature detection / Library info
+
+```eval_rst
+.. currentmodule:: mxnet.runtime
+```
+
+## Overview
+
+The libinfo functionality allows to check for compile-time features supported by the library.
+
+### Example usage
+
+```python
+In [1]: import mxnet as mx
+
+In [2]: import mxnet.runtime
+
+In [3]: mx.runtime.libinfo_features()
+Out[3]:
+[✔ CUDA,
+ ✔ CUDNN,
+ ✔ NCCL,
+ ✔ CUDA_RTC,
+ ✔ TENSORRT,
+ ✖ CPU_SSE,
+ ✖ CPU_SSE2,
+ ✖ CPU_SSE3,
+ ✖ CPU_SSE4_1,
+ ✖ CPU_SSE4_2,
+ ✔ CPU_SSE4A,
+ ✖ CPU_AVX,
+ ✔ CPU_AVX2,
+ ✔ OPENMP,
+ ✔ SSE,
+ ✖ F16C,
+ ✔ JEMALLOC,
+ ✖ BLAS_OPEN,
+ ✔ BLAS_ATLAS,
+ ✔ BLAS_MKL,
+ ✔ BLAS_APPLE,
+ ✔ LAPACK,
+ ✔ MKLDNN,
+ ✖ OPENCV,
+ ✔ CAFFE,
+ ✔ PROFILER,
+ ✔ DIST_KVSTORE,
+ ✔ CXX14,
+ ✔ SIGNAL_HANDLER,
+ ✖ DEBUG]
+```
+
+
+```eval_rst
+.. autosummary::
+    :nosignatures:
+
+    LibFeature
+    libinfo_features
+```
+
+## API Reference
+
+<script type="text/javascript" src='../../../_static/js/auto_module_index.js'></script>
+
+```eval_rst
+.. automodule:: mxnet.runtime
+    :members:
+```
+
+<script>auto_index("api-reference");</script>

python/mxnet/runtime.py

@@ -28,11 +28,21 @@ class LibFeature(ctypes.Structure):
     Compile time feature description
     """
     _fields_ = [
-        ("name", ctypes.c_char_p),
+        ("_name", ctypes.c_char_p),
         ("index", ctypes.c_uint32),
         ("enabled", ctypes.c_bool)
     ]
 
+    @property
+    def name(self):
+        return self._name.decode()
+
+    def __repr__(self):
+        if self.enabled:
+            return "✔ {}".format(self.name)
+        else:
+            return "✖ {}".format(self.name)
+
 def libinfo_features():
     """
     Check the library for compile-time features. The list of features are maintained in libinfo.h and libinfo.cc