summaryrefslogtreecommitdiff
path: root/python/problems/dictionaries/most_frequent
diff options
context:
space:
mode:
authorMartin Možina <martin.mozina@fri.uni-lj.si>2016-08-24 15:32:22 +0200
committerMartin Možina <martin.mozina@fri.uni-lj.si>2016-08-24 15:32:22 +0200
commit12378810ee9207536bfa0c264c1bf2a2b0296171 (patch)
tree902e226e249a5369928e3fbc7e85739e14448b46 /python/problems/dictionaries/most_frequent
parentc2e782122d52acea0e69f8a5a92b40bbbb7072e5 (diff)
Added several new exercises for Python (related to dictionaries and sets).
Diffstat (limited to 'python/problems/dictionaries/most_frequent')
-rw-r--r--python/problems/dictionaries/most_frequent/common.py82
-rw-r--r--python/problems/dictionaries/most_frequent/en.py13
-rw-r--r--python/problems/dictionaries/most_frequent/sl.py30
3 files changed, 125 insertions, 0 deletions
diff --git a/python/problems/dictionaries/most_frequent/common.py b/python/problems/dictionaries/most_frequent/common.py
new file mode 100644
index 0000000..a945f1d
--- /dev/null
+++ b/python/problems/dictionaries/most_frequent/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 = 20604
+number = 3
+visible = True
+
+solution = '''\
+# Count number of elements in list xs.
+def freq(xs):
+ hist = {}
+ for x in xs:
+ if x not in hist:
+ hist[x] = 0
+ hist[x] += 1
+ return hist
+
+# Find element with maximal frequency
+def max_freq(f):
+ max_freq = 0
+ max_item = None
+ for item, item_freq in f.items():
+ if item_freq > max_freq:
+ max_freq = item_freq
+ max_item = item
+ return max_item
+
+def most_frequent(s):
+ return max_freq(freq(s.split())), max_freq(freq(s))
+'''
+
+hint_type = {
+ 'final_hint': Hint('final_hint')
+}
+
+def test(python, code):
+ func_name = 'most_frequent'
+ 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 = [
+ ('a', ('a', 'a')),
+ ('aa bb aa', ('aa', 'a')),
+ ('in to in ono in to smo mi', ('in', ' ')),
+ ('abc abc abc abacbca', ('abc', 'a')),
+ ('abc abc abc abacbcb', ('abc', 'b')),
+ ('abc abc abc abacbcc', ('abc', 'c')),
+ ]
+
+ 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/most_frequent/en.py b/python/problems/dictionaries/most_frequent/en.py
new file mode 100644
index 0000000..1ef9394
--- /dev/null
+++ b/python/problems/dictionaries/most_frequent/en.py
@@ -0,0 +1,13 @@
+id = 20604
+name = 'Most frequent'
+
+description = '''\
+<p>(translation missing)</p>'''
+
+hint = {
+ 'plan': '''\
+<p>(translation missing)</p>''',
+
+ 'no_input_call': '''\
+<p>(translation missing)</p>''',
+}
diff --git a/python/problems/dictionaries/most_frequent/sl.py b/python/problems/dictionaries/most_frequent/sl.py
new file mode 100644
index 0000000..c877e20
--- /dev/null
+++ b/python/problems/dictionaries/most_frequent/sl.py
@@ -0,0 +1,30 @@
+import server
+mod = server.problems.load_language('python', 'sl')
+
+
+id = 20604
+name = 'Najpogostejše'
+
+description = '''\
+<p>
+Napišite funkcijo <code>most_frequent(s)</code>, ki vrne besedo in znak,
+ki se v podanem nizu največkrat pojavita. V nizu
+<code>'in to in ono in to smo mi'</code> se največkrat pojavita beseda
+<code>'in'</code> in znak <code>' '</code> (presledek).
+<pre>
+>>> most_frequent('aa bb aa')
+('aa', 'a')
+>>> most_frequent('in to in ono in to smo mi')
+('in', ' ')
+</pre>
+</p>
+'''
+
+plan = []
+
+hint = {
+ 'final_hint': ['''\
+<p>Program je pravilen! <br>
+</p>
+'''],
+}