code: def post_nodes_file(self, file_path, file_type="csv"):
      return self.post_file(file_path, "nodes", file_type)
  
imports: from typing import List, Optional
  import io, pyarrow, requests, sys
  from graphistry.privacy import Mode, Privacy
  from .ArrowFileUploader import ArrowFileUploader
  from .util import setup_logger
label_desc: Use image node_id 52 for calling the ArrowUploader obj's underlying member method code with example usage: obj.post_nodes_file(file_path, file_type) and returns: self