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

3 files changed, 125 insertions, 0 deletions

diff --git a/python/problems/dictionaries/transactions/common.py b/python/problems/dictionaries/transactions/common.py
new file mode 100644
index 0000000..66d6387
--- /dev/null
+++ b/python/problems/dictionaries/transactions/common.py
@@ -0,0 +1,71 @@
+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 = 20605
+number = 4
+visible = True
+
+solution = '''\
+def transactions(start, trans):
+    state = dict(start)
+    for fr, to, amount in trans:
+        state[fr] -= amount
+        state[to] += amount
+    most = None # could use -1, however all can be in debt
+    for who, amount in state.items():
+        if most is None or amount > most:
+            most, richest = amount, who
+    return richest
+'''
+
+hint_type = {
+    'final_hint': Hint('final_hint')
+}
+
+def test(python, code):
+    func_name = 'transactions'
+    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 = [
+        (([("Ana", 0), ("Berta", 1)], [("Berta", "Ana", 1)]), "Ana"),
+        (([("Ana", 0), ("Berta", 1)], []), "Berta"),
+        (([("Ana", 3), ("Berta", 2)], [("Berta", "Berta", 3)]), "Ana"),
+        (([("Ana", 4), ("Berta", 8), ("Cilka", 10)],
+          [("Cilka", "Ana", 3), ("Cilka", "Ana", 2), ("Ana", "Berta", 2)]),
+         "Berta"),
+    ]
+
+    test_in = [('{0}{1}'.format(func_name, str(l[0])), None) for l in in_out]
+    test_out = [l[1] for l in in_out]
+
+    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 += ans[0] == to
+        if 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/transactions/en.py b/python/problems/dictionaries/transactions/en.py
new file mode 100644
index 0000000..f60bc08
--- /dev/null
+++ b/python/problems/dictionaries/transactions/en.py
@@ -0,0 +1,13 @@
+id = 20605
+name = 'Transactions'
+
+description = '''\
+<p>(translation missing)</p>'''
+
+hint = {
+    'plan': '''\
+<p>(translation missing)</p>''',
+
+    'no_input_call': '''\
+<p>(translation missing)</p>''',
+}
diff --git a/python/problems/dictionaries/transactions/sl.py b/python/problems/dictionaries/transactions/sl.py
new file mode 100644
index 0000000..b80a688
--- /dev/null
+++ b/python/problems/dictionaries/transactions/sl.py
@@ -0,0 +1,41 @@
+import server
+mod = server.problems.load_language('python', 'sl')
+
+
+id = 20605
+name = 'Transakcije'
+
+description = '''\
+<p>
+V začetku je imela Ana štiri zlatnike, Berta 8 in CIlka 10, torej
+<code>[('Ana', 4), ('Berta', 8), ('Cilka', 10)]</code>. Nato je dala Cilka
+Ani 3 zlatnike; potem je dala Cilka Ani še 2; na koncu je dala Ana Berti 2,
+kar zapišemo <code>[('Cilka', 'Ana', 3), ('Cilka', 'Ana', 2), ('Ana', 'Berta', 2)]</code>.
+Kdo	ima na koncu največ?
+</p>
+
+<p>
+Napišite funkcijo <code>transactions(start, tr)</code>, ki dobi gornja seznama in
+vrne ime najbogatejše osebe po koncu transakcij. Če je na koncu več enako
+bogatih najbogatejših oseb, naj vrne poljubno izmed njih. Namig: delo
+si boste poenostavili, če bo funkcija takoj pretvorila sezmam v
+primernejšo	podatkovno strukturo.
+</p>
+<p>
+Primer
+<pre>
+>>> transakcije([('Ana', 4), ('Berta', 8), ('Cilka', 10)], [('Cilka', 'Ana', 3),
+('Cilka', 'Ana', 2), ('Ana', 'Berta', 2)])
+Berta
+</pre>
+</p>
+'''
+
+plan = []
+
+hint = {
+    'final_hint': ['''\
+<p>Program je pravilen! <br>
+</p>
+'''],
+}