code: def time_add(self, engine, threads):
      pd.eval("self.df + self.df2 + self.df3 + self.df4", engine=engine)
  
file_path: pandas/asv_bench/benchmarks/eval.py
imports: import numpy
  import pandas
  from .pandas_vb_common import setup
label_desc: Use image node_id 2 for calling the Eval obj's underlying member method code with example usage: obj.time_add(engine, threads) without return types