class_docstr: Execution style for orders to be filled at current market price.
  
  This is the default for orders placed with :func:`~zipline.api.order`.
class_docstr_tok: ["Execution","style","for","orders","to","be","filled","at","current","market","price",".","This","is","the","default","for","orders","placed","with",":","func",":","`","~zipline.api.order","`","."]
code: def get_limit_price(self, _is_buy):
      return None
  
imports: import abc
  from sys import float_info
  from six import with_metaclass
  from numpy import isfinite
  import zipline.utils.math_utils
  from zipline.errors import BadOrderParameters
  from zipline.utils.compat import consistent_round
label_desc: Use image node_id 2 for calling the MarketOrder obj's underlying member method code with example usage: obj.get_limit_price(_is_buy) and returns: None