class_docstr: This sizer simply returns a fixed size for any operation.
  Size can be controlled by number of tranches that a system
  wishes to use to scale into trades by specifying the ``tranches``
  parameter.
  
  
  Params:
    - ``stake`` (default: ``1``)
    - ``tranches`` (default: ``1``)
class_docstr_tok: ["This","sizer","simply","returns","a","fixed","size","for","any","operation",".","Size","can","be","controlled","by","number","of","tranches","that","a","system","wishes","to","use","to","scale","into","trades","by","specifying","the","``","tranches","``","parameter",".","Params",":","-","``","stake","``","(","default",":","``","1","``",")","-","``","tranches","``","(","default",":","``","1","``",")"]
code: def _getsizing(self, comminfo, cash, data, isbuy):
      if self.p.tranches > 1:
          return abs(int(self.p.stake / self.p.tranches))
      else:
          return self.p.stake
  
file_path: backtrader/backtrader/sizers/fixedsize.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import backtrader
label_desc: Use image node_id 1 for calling the FixedSize obj's underlying member method code with example usage: obj._getsizing(comminfo, cash, data, isbuy) and returns: abs, self