Added several new exercises for Python (related to dictionaries and sets).

3 files changed, 144 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
diff --git a/python/problems/dictionaries/waiter/en.py b/python/problems/dictionaries/waiter/en.py
new file mode 100644
index 0000000..7f8528b
--- /dev/null
+++ b/python/problems/dictionaries/waiter/en.py
@@ -0,0 +1,13 @@
+id = 20606
+name = 'Waiter'
+
+description = '''\
+<p>(translation missing)</p>'''
+
+hint = {
+    'plan': '''\
+<p>(translation missing)</p>''',
+
+    'no_input_call': '''\
+<p>(translation missing)</p>''',
+}
diff --git a/python/problems/dictionaries/waiter/sl.py b/python/problems/dictionaries/waiter/sl.py
new file mode 100644
index 0000000..d2bd50b
--- /dev/null
+++ b/python/problems/dictionaries/waiter/sl.py
@@ -0,0 +1,50 @@
+import server
+mod = server.problems.load_language('python', 'sl')
+
+
+id = 20606
+name = 'Natakar'
+
+description = '''\
+<p>
+Ko je prišel natakar, so naročile:
+<ul>
+<li>Ana je naročila torto,</li>
+<li>Berta je naročila krof,</li>
+<li>Cilka je naročila kavo,</li>
+<li>Ana je naročila še kavo,</li>
+<li>Berta je rekla, da ne bo krofa,</li>
+<li>Cilka je rekla, da ne bo torte (no, saj je niti ni naročila;
+to natakar mirno ignorira),</li>
+<li>Berta je naročila torto.</li></ul>
+<p>
+Vse skupaj zapišemo takole: <code>[("Ana", "torta"), ("Berta", "krof"),
+("Cilka", "kava"), ("Ana", "kava"), ("Berta", "-krof"), ("Cilka", "-torta"),
+("Berta", "torta")]</code>. Seznam torej vsebuje pare nizov (oseba, jed),
+pri čemer se jed včasih začne z "-", kar pomeni, da stranka prekliče naročilo te
+jedi oz. pijače.</p>
+
+<p>Napiši funkcijo <code>orders(s)</code>, ki prejme takšen seznam in vrne
+slovar, katerega ključi so imena strank, vrednost pri vsakem ključu pa je
+seznam vsega, kar mora stranka na koncu dobiti.</p>
+<p>Primer
+<pre>
+>>> orders([('Ana', 'torta'), ('Berta', 'krof'), ('Cilka', 'kava'), ('Ana', 'kava'),
+('Berta', '-krof'), ('Cilka', '-torta'), ('Berta', 'torta')])
+{'Cilka': ['kava'], 'Berta': ['torta'], 'Ana': ['torta', 'kava']}
+>>> orders([('Ana', 'torta'), ('Ana', '-torta')])
+{'Ana': []}
+>>> orders([('Ana', '-torta')])
+{'Ana': []} # Tu sme funkcija vrniti tudi prazen slovar, {}
+</pre>
+</p>
+'''
+
+plan = []
+
+hint = {
+    'final_hint': ['''\
+<p>Program je pravilen! <br>
+</p>
+'''],
+}