code: def init(self):
      # called from init and from start
      if None not in self.comminfo:
          self.comminfo = dict({None: self.p.commission})
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  from backtrader.comminfo import CommInfoBase
  from backtrader.metabase import MetaParams
  from backtrader.utils.py3 import with_metaclass
  from .None import fillers
  from .None import fillers
label_desc: Use image node_id 2 for calling the BrokerBase obj's underlying member method code with example usage: obj.init() without return types