class_docstr: CSV format benchmark writer.
  
  It writes benchmark statistics taken by :class:`FunctionBenchmark`
  in CSV file format.
  
  Args:
      file (Python file object): The benchmark will be written to the file.
class_docstr_tok: ["CSV","format","benchmark","writer",".","It","writes","benchmark","statistics","taken","by",":","class",":","`","FunctionBenchmark","`","in","CSV","file","format",".","Args",":","file","(","Python","file","object",")",":","The","benchmark","will","be","written","to","the","file","."]
code: def _stat_as_a_list(self, stat):
      return [
          "{:.2f}".format(stat.mean_time * 1000),
          str(stat.run_count),
      ]
  
imports: from __future__ import print_function
  import nnabla
  import nnabla.initializer
  import sys
  import importlib
  import time
  from collections import namedtuple
  import csv
label_desc: Use image node_id 3 for calling the FunctionBenchmarkCsvWriter obj's underlying member method code with example usage: obj._stat_as_a_list(stat) and returns: list