1 files changed, 81 insertions, 0 deletions
diff --git a/python/problems/dictionaries/waiter/common.py b/python/problems/dictionaries/waiter/common.py
new file mode 100644
index 0000000..bcda759
--- /dev/null
+++ b/python/problems/dictionaries/waiter/common.py
@@ -0,0 +1,81 @@
+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 = 20606
+number = 5
+visible = True
+
+solution = '''\
+import collections
+def orders(s):
+    cust = collections.defaultdict(list)
+    for pers, snack in s:
+        if snack[0] == "-":
+            if snack[1:] in cust[pers]:
+                cust[pers].remove(snack[1:])
+        else:
+            cust[pers].append(snack)
+    return dict(cust)
+'''
+
+hint_type = {
+    'final_hint': Hint('final_hint')
+}
+
+def comp(solution, test):
+    if not any(test.values()) and dict(solution) == {}:
+        return True
+    return dict(solution) == test
+
+def test(python, code):
+    func_name = 'orders'
+    tokens = get_tokens(code)
+    if not has_token_sequence(tokens, ['def', func_name]):
+        return False, [{'id' : 'no_func_name', 'args' : {'func_name' : func_name}}]
+
+    in_out = [
+        ([("Tone", "pivo")], {"Tone": ["pivo"]}),
+        ([("Tone", "pizza"), ("Tone", "sok")], {"Tone": ["pizza", "sok"]}),
+        ([('Ana', 'torta'), ('Berta', 'krof'), ('Cilka', 'kava'),
+             ('Ana', 'kava'), ('Berta', '-krof'), ('Cilka', '-torta'),
+             ('Berta', 'torta')],
+         {'Cilka': ['kava'], 'Berta': ['torta'], 'Ana': ['torta', 'kava']}),
+    ]
+    in_out_empty = [
+        ([('Ana', 'torta'), ('Ana', '-torta')], {'Ana': []}),
+        ([('Ana', '-torta')], {'Ana': []})
+    ]
+
+    test_in = [('{0}({1})'.format(func_name, str(l[0])), None)
+               for l in in_out+in_out_empty]
+    test_out = [l[1] for l in in_out+in_out_empty]
+
+    answers = python(code=code, inputs=test_in, timeout=1.0)
+    n_correct = 0
+    tin, tout = None, None
+    for i, (ans, to) in enumerate(zip(answers, test_out)):
+        n_correct += comp(ans[0], to)
+        if not comp(ans[0], to):
+            tin = test_in[i][0]
+            tout = to
+
+    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
+    answer = python(code=code, inputs=[(None, None)], timeout=1.0)
+    exc = get_exception_desc(answer[0][3])
+    if exc: return exc
+
+    return None