class_docstr: Abstract class defining the functions that a Communicator should implement.
class_docstr_tok: ["Abstract","class","defining","the","functions","that","a","Communicator","should","implement","."]
docstr: Gathers tensors from all parties in a list.
docstr_tok: ["Gathers","tensors","from","all","parties","in","a","list","."]
code: def all_gather(self, tensor, async_op=False):
      """Gathers tensors from all parties in a list."""
      raise NotImplementedError("all_gather is not implemented")
  
imports: import sys
  import timeit
  from crypten.config import cfg
label_desc: Use image node_id 11 for calling the Communicator obj's underlying member method code with example usage: obj.all_gather(tensor, async_op) without return types