1 files changed, 85 insertions, 0 deletions
diff --git a/testapp/exam/python_code_evaluator.py b/testapp/exam/python_code_evaluator.py
new file mode 100644
index 0000000..05a5063
--- /dev/null
+++ b/testapp/exam/python_code_evaluator.py
@@ -0,0 +1,85 @@
+#!/usr/bin/env python
+import sys
+import traceback
+import os
+from os.path import join
+import importlib
+
+# local imports
+from code_evaluator import CodeEvaluator
+# from language_registry import registry
+
+
+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
+
+    # # Public Protocol ##########
+    # def evaluate_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
+
+    # Private Protocol ##########
+    def _create_test_case(self):
+        """
+            Create assert based test cases in python
+        """
+        test_code = ""
+        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
+            tcode = "assert {0}({1}) == {2}".format(test_case.get('func_name'),
+                                                        args, test_case.get('expected_answer'))
+            test_code += tcode + "\n"
+        return test_code
+
+
+# registry.register('python', EvaluatePythonCode)