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authorMartin Možina <martin.mozina@fri.uni-lj.si>2016-09-27 16:38:23 +0200
committerMartin Možina <martin.mozina@fri.uni-lj.si>2016-09-27 16:38:23 +0200
commitfc34673e84ea9bc823e8530c7564f0caa6a99000 (patch)
tree71f45925be60c9fde7a438a4835c53ee261e2ad9 /python/problems/comprehensions/isbn
parent01eb98c7a5e86325e1243f0d0f4e111a18d1e535 (diff)
Added exercises with list comprehensions.
Diffstat (limited to 'python/problems/comprehensions/isbn')
-rw-r--r--python/problems/comprehensions/isbn/common.py76
-rw-r--r--python/problems/comprehensions/isbn/en.py13
-rw-r--r--python/problems/comprehensions/isbn/sl.py39
3 files changed, 128 insertions, 0 deletions
diff --git a/python/problems/comprehensions/isbn/common.py b/python/problems/comprehensions/isbn/common.py
new file mode 100644
index 0000000..4724713
--- /dev/null
+++ b/python/problems/comprehensions/isbn/common.py
@@ -0,0 +1,76 @@
+import re
+from python.util import has_token_sequence, string_almost_equal, \
+ string_contains_number, get_tokens, get_numbers, get_exception_desc, \
+ all_tokens, has_comprehension, has_loop, almost_equal, get_ast
+from server.hints import Hint
+
+id = 20707
+number = 7
+visible = True
+
+solution = '''\
+def valid(isbn):
+ return len(isbn) == 10 and sum((10 if c == 'X' else int(c)) * (10 - i) for i, c in enumerate(isbn)) % 11 == 0
+'''
+
+hint_type = {
+ 'final_hint': Hint('final_hint'),
+ 'no_comprehension': Hint('no_comprehension'),
+ 'has_loop': Hint('has_loop')
+}
+
+def test(python, code):
+ func_name = 'valid'
+ tokens = get_tokens(code)
+ ast = get_ast(code)
+ if not has_token_sequence(tokens, ['def', func_name]):
+ return False, [{'id' : 'no_func_name', 'args' : {'func_name' : func_name}}]
+
+ in_out = [
+ ('0306406152', True),
+ ('0553382578', True),
+ ('0553293370', True),
+ ('912115628X', True),
+ ('03064061522', False),
+ ('1553382578', False),
+ ('91211562811', False),
+ ]
+
+ 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)):
+ corr = ans[0] == to
+ n_correct += corr
+ if not corr:
+ 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:
+ if not has_comprehension(ast):
+ hints.append({'id': 'no_comprehension'})
+ elif has_loop(ast):
+ hints.append({'id': 'has_loop'})
+ else:
+ 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/comprehensions/isbn/en.py b/python/problems/comprehensions/isbn/en.py
new file mode 100644
index 0000000..638042c
--- /dev/null
+++ b/python/problems/comprehensions/isbn/en.py
@@ -0,0 +1,13 @@
+id = 20707
+name = 'ISBN'
+
+description = '''\
+<p>(translation missing)</p>'''
+
+hint = {
+ 'plan': '''\
+<p>(translation missing)</p>''',
+
+ 'no_input_call': '''\
+<p>(translation missing)</p>''',
+}
diff --git a/python/problems/comprehensions/isbn/sl.py b/python/problems/comprehensions/isbn/sl.py
new file mode 100644
index 0000000..7805aae
--- /dev/null
+++ b/python/problems/comprehensions/isbn/sl.py
@@ -0,0 +1,39 @@
+import server
+mod = server.problems.load_language('python', 'sl')
+
+
+id = 20707
+name = 'ISBN'
+
+description = '''\
+<p>
+Napišite funkcijo <code>valid(isbn)</code>, ki preveri ali je podan ISBN
+<a href="http://en.wikipedia.org/wiki/Check_digit#ISBN_10">veljaven</a>.</p>
+<pre>
+>>> valid('0306406152'), valid('0553382578'), valid('0553293370'), valid('912115628X') # primer veljavnih ...
+(True, True, True, True)
+>>> valid('03064061522'), valid('1553382578'), valid('91211562811') # ... in neveljavnih ISBN.
+(False, False, False)
+</pre>
+'''
+
+plan = []
+
+hint = {
+ 'final_hint': ['''\
+<p>Program je pravilen! <br>
+</p>
+'''],
+
+ 'no_comprehension': ['''\
+<p>Program je sicer pravilen, vendar ne vsebuje izpeljanih seznamov ali
+generatorjev...
+</p>
+'''],
+
+ 'has_loop': ['''\
+<p>Program je sicer pravilen, vendar vsebuje zanko.
+</p>
+'''],
+
+}