/
interpreter.py
74 lines (58 loc) · 2.65 KB
/
interpreter.py
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import os
from m2cgen import ast
from m2cgen.interpreters import mixins, utils
from m2cgen.interpreters.interpreter import ImperativeToCodeInterpreter
from m2cgen.interpreters.visual_basic.code_generator \
import VisualBasicCodeGenerator
class VisualBasicInterpreter(ImperativeToCodeInterpreter,
mixins.LinearAlgebraMixin):
supported_bin_vector_ops = {
ast.BinNumOpType.ADD: "AddVectors",
}
supported_bin_vector_num_ops = {
ast.BinNumOpType.MUL: "MulVectorNumber",
}
exponent_function_name = "Math.Exp"
tanh_function_name = "Tanh"
with_tanh_expr = False
def __init__(self, module_name="Model", indent=4, function_name="Score",
*args, **kwargs):
self.module_name = module_name
self.function_name = function_name
cg = VisualBasicCodeGenerator(indent=indent)
kwargs["feature_array_name"] = "inputVector"
super(VisualBasicInterpreter, self).__init__(cg, *args, **kwargs)
def interpret(self, expr):
self._cg.reset_state()
self._reset_reused_expr_cache()
args = [(True, self._feature_array_name)]
func_name = self.function_name
with self._cg.function_definition(
name=func_name,
args=args,
is_scalar_output=expr.output_size == 1):
last_result = self._do_interpret(expr)
self._cg.add_return_statement(last_result, func_name)
if self.with_linear_algebra:
filename = os.path.join(
os.path.dirname(__file__), "linear_algebra.bas")
self._cg.prepend_code_lines(utils.get_file_content(filename))
# Use own Tanh function in order to be compatible with both VB and VBA
if self.with_tanh_expr:
filename = os.path.join(
os.path.dirname(__file__), "tanh.bas")
self._cg.prepend_code_lines(utils.get_file_content(filename))
self._cg.prepend_code_line(self._cg.tpl_module_definition(
module_name=self.module_name))
self._cg.add_code_line(self._cg.tpl_block_termination(
block_name="Module"))
return self._cg.finalize_and_get_generated_code()
def interpret_pow_expr(self, expr, **kwargs):
base_result = self._do_interpret(expr.base_expr, **kwargs)
exp_result = self._do_interpret(expr.exp_expr, **kwargs)
return self._cg.infix_expression(
left=base_result, right=exp_result, op="^")
def interpret_tanh_expr(self, expr, **kwargs):
self.with_tanh_expr = True
return super(
VisualBasicInterpreter, self).interpret_tanh_expr(expr, **kwargs)