class_docstr: PlaceholderGenerator is a generic class to generate strategies for placeholder node.
class_docstr_tok: ["PlaceholderGenerator","is","a","generic","class","to","generate","strategies","for","placeholder","node","."]
code: def collate_strategies(self) -> List[ShardingStrategy]:
      strategy_list = []
      if self.placeholder_option == "distributed":
          mesh_list = [0, 1]
          distributed_strategy = self.distributed_placeholder(mesh_list)
          strategy_list.append(distributed_strategy)
      else:
          assert (
              self.placeholder_option == "replicated"
          ), f"placeholder_option {self.placeholder_option} is not supported"
          replicated_strategy = self.replica_placeholder()
          strategy_list.append(replicated_strategy)
  
      return strategy_list
  
file_path: ColossalAI/colossalai/auto_parallel/tensor_shard/node_handler/strategy/placeholder_generator.py
imports: from typing import Dict, List
  from colossalai.auto_parallel.tensor_shard.sharding_strategy import MemoryCost, OperationData, ShardingStrategy, TrainCycleItem
  from colossalai.device.device_mesh import DeviceMesh
  from .strategy_generator import StrategyGenerator
label_desc: Use image node_id 7 for calling the PlaceholderGenerator obj's underlying member method code with example usage: obj.collate_strategies() and returns: strategy_list