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

3 files changed, 114 insertions, 0 deletions

diff --git a/python/problems/dictionaries/max_characters/common.py b/python/problems/dictionaries/max_characters/common.py
new file mode 100644
index 0000000..cb0c4b6
--- /dev/null
+++ b/python/problems/dictionaries/max_characters/common.py
@@ -0,0 +1,72 @@
+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 = 20603
+number = 2
+visible = True
+
+solution = '''\
+def maxchars(words):
+    max_chars = 0
+    max_word = None
+    for w in words:
+        chars = len(set(w.lower()))
+        if chars > max_chars:
+            max_chars = chars
+            max_word = w
+    return max_word
+'''
+
+hint_type = {
+    'final_hint': Hint('final_hint')
+}
+
+def test(python, code):
+    func_name = 'maxchars'
+    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 = [
+        ([], None),
+        (['RABarbara', 'izpit', 'zmagA'], 'izpit'),
+        (['RABarbara'], 'RABarbara'),
+        (['RABarbara', 'Izpit', 'izpit', 'zmagA'], 'Izpit'),
+        (['RABarbara', 'izpit', 'Izpit', 'zmagA'], 'izpit'),
+        (['Vesel', 'RABarbara', 'izpit', 'Izpit', 'zmagA'], 'Vesel'),
+        (['RABarbara', 'izpit', 'Izpit', 'zmagA', 'Vesel'], 'izpit'),
+        (['RABarbara', 'izpit', 'Izpit', 'zmagA', 'Veselica'], 'Veselica'),
+    ]
+
+    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/max_characters/en.py b/python/problems/dictionaries/max_characters/en.py
new file mode 100644
index 0000000..e42996e
--- /dev/null
+++ b/python/problems/dictionaries/max_characters/en.py
@@ -0,0 +1,13 @@
+id = 20603
+name = 'Number of characters'
+
+description = '''\
+<p>(translation missing)</p>'''
+
+hint = {
+    'plan': '''\
+<p>(translation missing)</p>''',
+
+    'no_input_call': '''\
+<p>(translation missing)</p>''',
+}
diff --git a/python/problems/dictionaries/max_characters/sl.py b/python/problems/dictionaries/max_characters/sl.py
new file mode 100644
index 0000000..835c84f
--- /dev/null
+++ b/python/problems/dictionaries/max_characters/sl.py
@@ -0,0 +1,29 @@
+import server
+mod = server.problems.load_language('python', 'sl')
+
+
+id = 20603
+name = 'Število znakov'
+
+description = '''\
+<p>
+Napiši funkcijo <code>maxchars(words)</code>, ki kot argument prejme seznam nizov
+in kot rezultat vrne niz, ki ima največ različnih znakov. Male in velike črke
+upoštevaj kot iste znake - beseda <code>"MamA"</code> ima samo dva različna znaka.
+Če obstaja več besed z enakim številom različnih znakov, naj vrne prvo med njimi.
+Če je seznam prazen, naj funkcija vrne <code>None</code>.
+</p>
+<pre>
+>>> besede = ["RABarbara", "izpit", "zmagA"]
+>>> maxchars(besede)
+'izpit'
+'''
+
+plan = []
+
+hint = {
+    'final_hint': ['''\
+<p>Program je pravilen! <br>
+</p>
+'''],
+}