code: def feature_list():
      """Check the library for compile-time features. The list of features are maintained in libinfo.h and libinfo.cc
  
      Returns
      -------
      list
          List of :class:`.Feature` objects
      """
      lib_features_c_array = ctypes.POINTER(Feature)()
      lib_features_size = ctypes.c_size_t()
      check_call(
          _LIB.MXLibInfoFeatures(
              ctypes.byref(lib_features_c_array),
              ctypes.byref(lib_features_size),
          )
      )
      features = [
          lib_features_c_array[i]
          for i in range(lib_features_size.value)
      ]
      return features
  
file_path: mxnet/python/mxnet/runtime.py
imports: import ctypes
  import collections
  from .base import _LIB, check_call
label_desc: Use image node_id 1 for calling a global function with example usage: feature_list() and returns: features