code: def nodes():
      '''
      List running nodes on all enabled cloud providers. Automatically flushes caches
      '''
      for name, provider in env.providers.items():
          print name
          provider.nodes()
          prinf nodes():
      '''
      List running nodes on all enabled cloud providers. Automatically flushes caches
      '''
      for name, provider in env.providers.items():
          print name
          provider.nodes()
          print
docs: List running nodes on all enabled cloud providers. Automatically flushes caches