class_docstr: A data class to store a list of HostInfo objects.
code: def __iter__(self):
      return iter(self.hostinfo_list)
  
file_path: colossalai/colossalai/cli/launcher/hostinfo.py
imports: import socket
label_desc: Use image node_id 6 for calling the HostInfoList obj's underlying member method code with example usage: obj.__iter__() and returns: iter