Bad list constructor code

[gfurnish]

Consider:

 405:     _operands = list()

  __pyx_1 = PyObject_Call(((PyObject*)&PyList_Type), ((PyObject *)__pyx_empty_tuple), NULL); if (unlikely(!__pyx_1)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 405; __pyx_clineno = __LINE__; goto __pyx_L1;}
  Py_DECREF(__pyx_v__operands);
  __pyx_v__operands = __pyx_1;
  __pyx_1 = 0;

This is wildly inefficient compared to a single PyList?_New(0) call.

[robertwb]

Use

_operands = []

instead.