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#!/usr/bin/env python
import sys
import traceback
import os
from os.path import join
import importlib
# local imports
from code_evaluator import CodeEvaluator
class PythonCodeEvaluator(CodeEvaluator):
"""Tests the Python code obtained from Code Server"""
# Private Protocol ##########
def _check_code(self):
success = False
try:
tb = None
test_code = self._create_test_case()
submitted = compile(self.user_answer, '<string>', mode='exec')
g = {}
exec submitted in g
_tests = compile(test_code, '<string>', mode='exec')
exec _tests in g
except AssertionError:
type, value, tb = sys.exc_info()
info = traceback.extract_tb(tb)
fname, lineno, func, text = info[-1]
text = str(test_code).splitlines()[lineno-1]
err = "{0} {1} in: {2}".format(type.__name__, str(value), text)
else:
success = True
err = 'Correct answer'
del tb
return success, err
def _create_test_case(self):
"""
Create assert based test cases in python
"""
test_code = ""
if self.test:
return self.test
elif self.test_case_data:
for test_case in self.test_case_data:
pos_args = ", ".join(str(i) for i in test_case.get('pos_args')) \
if test_case.get('pos_args') else ""
kw_args = ", ".join(str(k+"="+a) for k, a
in test_case.get('kw_args').iteritems()) \
if test_case.get('kw_args') else ""
args = pos_args + ", " + kw_args if pos_args and kw_args \
else pos_args or kw_args
function_name = test_case.get('func_name')
expected_answer = test_case.get('expected_answer')
tcode = "assert {0}({1}) == {2}".format(function_name, args,
expected_answer)
test_code += tcode + "\n"
return test_code
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