code: def load_resource(path, root=''):
          
  
          if root:
              full_path = root + '/' + path.strip('/')
          else:
              full_path = path
  
          buf = ''
  
          try:
              buf = open(full_path).read()
          except IOError:
              pkg, path = full_path.split('/', 1)
              try:
                  import pkg_resources
                  buf = pkg_resources.resource_string(pkg, path)
                  # compatible python3 and only support utf-8
                  if type(buf) != str:
                      buf = buf.decode('utf-8')
                      pass
              except AttributeError:
                  # load resource feature not work in python2
                  pass
  
          return buf
docs: .. warning::
  
              Experiment feature.
  
              BE CAREFUL! WE MAY REMOVE THIS FEATURE!
  
  
          load resource file which in package.
          this method is used to load file easier in different environment.
  
          e.g:
  
          consume we have a file named `resource.io` in package `cliez.conf`,
          and we want to load it.
          the easiest way may like this:
  
          .. code-block:: python
  
              open('../conf/resource.io').read()
  
  
          An obvious problem is `..` is relative path.
          it will cause an error.
  
          `load_resource` is designed for solve this problem.
  
  
          The following code are equivalent:
  
          .. code-block:: python
  
              a = Component()
              a.load_resource('resource.io', root='cliez/base')
              a.load_resource('base/resource.io', root='cliez')
              a.load_resource('/base/resource.io', root='cliez')
              a.load_resource('cliez/base/resource.io')
              a.load_resource(__file__.rsplit('/', 2)[0] +
              '/cliez/base/resource.io')
  
  
          .. note::
  
              The document charset *MUST BE* utf-8
  
  
          :param str path: file path
          :param str root: root path
  
          :return: str