1 files changed, 93 insertions, 0 deletions
diff --git a/python/problems/introduction/leap_year/common.py b/python/problems/introduction/leap_year/common.py
new file mode 100644
index 0000000..7dc7318
--- /dev/null
+++ b/python/problems/introduction/leap_year/common.py
@@ -0,0 +1,93 @@
+from python.util import has_token_sequence, string_almost_equal, \
+    string_contains_number, get_tokens, get_numbers, get_exception_desc
+from server.hints import Hint
+import re
+
+id = 20107
+number = 7
+visible = True
+
+solution = '''\
+leto = int(input("Vnesi leto: "))
+if leto % 4 == 0 and (leto % 100 != 0 or leto % 400 == 0):
+    print("Je prestopno")
+else:
+    print("Ni prestopno")
+'''
+
+hint_type = {
+    'mod_expression': Hint('mod_expression'),
+    'printing': Hint('printing'),
+    'name_error': Hint('name_error'),
+    'unsupported_operand': Hint('unsupported_operand'),
+    'final_hint': Hint('final_hint'),
+}
+
+def test(python, code):
+    # List of inputs: (expression to eval, stdin).
+    test_in = [
+        (None, '1900\n'),
+        (None, '1950\n'),
+        (None, '2000\n'),
+        (None, '2016\n'),
+        (None, '2100\n'),
+    ]
+    test_out = [
+        "Ni prestopno",
+        "Ni prestopno",
+        "Je prestopno",
+        "Je prestopno",
+        "Ni prestopno"
+    ]
+
+    # List of outputs: (expression result, stdout, stderr, exception).
+    answers = python(code=code, inputs=test_in, timeout=1.0)
+    outputs = [ans[1] for ans in answers]
+
+    n_correct = 0
+    tin = None
+    for i, (output, correct) in enumerate(zip(outputs, test_out)):
+        if correct in output:
+            n_correct += 1
+        else:
+            tin = test_in[i][1]
+            tout = correct
+
+    passed = n_correct == len(test_in)
+    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_in)}}]
+    if tin:
+        hints.append({'id': 'problematic_test_case', 'args': {'testin': str(tin), 'testout': str(tout)}})
+    if passed:
+        hints.append({'id': 'final_hint'})
+    return passed, hints
+
+def hint(python, code):
+    tokens = get_tokens(code)
+
+    # run one test first to see if there are any exceptions
+    test_in = [(None, '212\n')]
+    answer = python(code=code, inputs=test_in, timeout=1.0)
+    exc = answer[0][3]
+    exc_hint = get_exception_desc(answer[0][3])
+    if exc:
+        if 'NameError' in exc:
+            return [{'id':'name_error', 'args': {'message': exc}}]
+        elif 'not callable' in exc:
+            return [{'id':'not_callable', 'args': {'message': exc}}]
+        elif 'unsupported operand' in exc:
+            return [{'id':'unsupported_operand', 'args': {'message': exc}}]
+        elif 'TypeError' in exc:
+            return [{'id':'unsupported_operand', 'args': {'message': exc}}]
+        else:
+            return exc_hint
+
+    # if token % not in code, we have to teach them how to
+    # evaluate expressions.
+    if (not has_token_sequence(tokens, ['%'])):
+        return [{'id' : 'mod_expression'}]
+
+    # student is not using print function
+    if not has_token_sequence(tokens, ['print']):
+        return [{'id' : 'printing'}]
+
+    return None