1 files changed, 82 insertions, 0 deletions
diff --git a/python/problems/lists_and_if-fkkt/even_odd/common.py b/python/problems/lists_and_if-fkkt/even_odd/common.py
new file mode 100644
index 0000000..a6b7f64
--- /dev/null
+++ b/python/problems/lists_and_if-fkkt/even_odd/common.py
@@ -0,0 +1,82 @@
+import re
+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
+
+id = 25005
+number = 1
+visible = True
+
+solution = '''\
+seznam = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+seznam_lihi = seznam[::2]
+seznam_sodi = seznam[1::2]
+print(seznam_lihi)
+print(seznam_sodi)
+'''
+
+hint_type = {
+    'no_xs': Hint('no_xs'),
+    'printing': Hint('printing'),
+    'final_hint': Hint('final_hint')
+}
+
+def test(python, code, aux_code=''):
+    tokens = get_tokens(code)
+
+    test_xs = [[1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
+               [1, 2, 3, 4],
+			   [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+			  ]
+    test_out = [
+        '[1, 3, 5, 7, 9]\n[2, 4, 6, 8, 10]',
+        '[1, 3]\n[2, 4]',
+        '[1, 3, 5, 7, 9, 11, 13]\n[2, 4, 6, 8, 10, 12, 14]'
+    ]
+
+    n_correct = 0
+    tin = None
+    for xs_i, xs in enumerate(test_xs):
+        # change code to contain new xs instead of the one
+        # given by user
+        tcode = re.sub(r'^seznam\s*=\s*\[.*?\]',
+                       'seznam = ' + str(xs),
+                       code,
+                       flags = re.DOTALL | re.MULTILINE)
+
+        # use python session to call tcode
+        answers = python(code=aux_code+tcode, inputs=[(None, None)], timeout=1.0)
+        output = answers[0][1]
+
+        if re.sub("\s", "", test_out[xs_i]) in re.sub("\s", "", output):
+            n_correct += 1
+        else:
+            tin = test_xs[xs_i]
+            tout = test_out[xs_i]
+
+    passed = n_correct == len(test_xs)
+    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_xs)}}]
+    if tin != None:
+        hints.append({'id': 'problematic_test_case', 'args': {'testin': str(tin), 'testout': str(tout)}})
+    else:
+        hints.append({'id' : 'final_hint'})
+    return passed, hints
+
+def hint(python, code, aux_code=''):
+    # run one test first to see if there are any exceptions
+    answer = python(code=aux_code+code, inputs=[(None, None)], timeout=1.0)
+    exc = get_exception_desc(answer[0][3])
+    if exc: return exc
+
+    tokens = get_tokens(code)
+
+    # if has no xs, tell him to ask for values
+    if not has_token_sequence(tokens, ['seznam', '=', '[']):
+        return [{'id' : 'no_xs'}]
+
+
+    # student is not using print function
+    if not has_token_sequence(tokens, ['print']):
+        return [{'id' : 'printing'}]
+
+    return None