class_docstr: This class is used as base for tests that check the proper
  handling of meta parameters like `frompackages`, `packages`, `params`, `lines`
  in inherited classes
class_docstr_tok: ["This","class","is","used","as","base","for","tests","that","check","the","proper","handling","of","meta","parameters","like","`","frompackages","`",",","`","packages","`",",","`","params","`",",","`","lines","`","in","inherited","classes"]
code: def __init__(self):
      self.range = factorial(10)
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import datetime
  import os
  import os.path
  import sys
  import backtrader
  import backtrader.utils.flushfile
  from backtrader.metabase import ParamsBase
label_desc: Use image node_id 1 to create a new SampleParamsHolder object from inherited base classes: ParamsBase with example: obj = SampleParamsHolder()