code: def calc_net_liquidation(ending_cash, long_value, short_value):
      return ending_cash + long_value + short_value
  
imports: from __future__ import division
  import logbook
  import numpy
  from collections import namedtuple
  from catalyst.assets import Future
  from six import itervalues, iteritems
  import catalyst.protocol
  from catalyst.constants import LOG_LEVEL
label_desc: Use image node_id 1 for calling a global function with example usage: calc_net_liquidation(ending_cash, long_value, short_value) and returns: unknown