From 87a510e8c93ebdd9f535bf32450d385af87396de Mon Sep 17 00:00:00 2001 From: Martin Date: Tue, 15 Sep 2015 16:58:40 +0200 Subject: Added a new problem: Average --- python/problems/introduction/average/common.py | 98 ++++++++++++++++++++++ python/problems/introduction/average/en.py | 16 ++++ python/problems/introduction/average/sl.py | 90 ++++++++++++++++++++ python/problems/introduction/ballistics/sl.py | 11 +-- .../introduction/fahrenheit_to_celsius/sl.py | 16 +--- .../introduction/pythagorean_theorem/sl.py | 11 +-- 6 files changed, 210 insertions(+), 32 deletions(-) create mode 100644 python/problems/introduction/average/common.py create mode 100644 python/problems/introduction/average/en.py create mode 100644 python/problems/introduction/average/sl.py (limited to 'python') diff --git a/python/problems/introduction/average/common.py b/python/problems/introduction/average/common.py new file mode 100644 index 0000000..37d5315 --- /dev/null +++ b/python/problems/introduction/average/common.py @@ -0,0 +1,98 @@ +# coding=utf-8 + +from python.util import has_token_sequence, string_almost_equal +from server.hints import Hint, HintSequence + +id = 189 +group = 'introduction' +number = 2 +visible = True + +solution = '''\ +a = float(input('Ocena [Ana]? ')) +b = float(input('Ocena [Benjamin]? ')) +c = float(input('Ocena [Cilka]? ')) +print('Povpre?je:', (a + b + c) / 3) +print('Srednja vrednost:', a + b + c - min(a, b, c) - max( a, b, c)) +''' + +hint_type = { + 'plan': Hint('plan'), + 'eval_expression': Hint('eval_expression'), + 'name_error': HintSequence('name_error', 4), + 'unsupported_operand': HintSequence('unsupported_operand', 4), + 'error': HintSequence('error', 2), + 'radians': HintSequence('radians', 3), + 'printing': Hint('printing'), +} + + + +def test(python, code): + # List of inputs: (expression to eval, stdin). + test_in = [ + (None, '2\n4\n5\n'), + (None, '1\n1\n4\n'), + (None, '2\n5\n1\n'), + (None, '3\n1\n1\n'), + (None, '5\n1\n5\n'), + ] + + test_out = [ + [3.67, 4], + [2, 1], + [2.67, 2], + [1.67, 1], + [3.67, 5] + ] + + # List of outputs: (expression result, stdout, stderr, exception). + answers = python(code=code, inputs=test_in, timeout=1.0) + outputs = [ans[1] for ans in answers] + + n_correct = 0 + for output, c in zip(outputs, test_out): + if string_almost_equal(output, c[0]) and \ + string_almost_equal(output, c[1]): + n_correct += 1 + return n_correct, len(test_in) + +def hint(python, code): + # run one test first to see if there are any exceptions + test_in = [(None, '1\n1\n4\n')] + answer = python(code=code, inputs=test_in, timeout=1.0) + exc = answer[0][3] + # if have an exception! + if exc: + if 'NameError' in exc: + return [{'id':'name_error', 'args': {'message': exc}}] + elif 'TypeError' in exc: + return [{'id':'type_error', 'args': {'message': exc}}] + else: + return [{'id':'error', 'args': {'message': exc}}] + + # show plan if student is lost + # a) empty progam + # b) there is not input (we can do it here, since we have no input hint) + if not code or (not has_token_sequence(code, ['input'])): + return [{'id': 'plan'}] + + # Help to compute average (if /3 is not program) + if not has_token_sequence(code, ['/', '3']): + return [{'id': 'average'}] + + # If student is not using functions min or max, then he is + # not computing median in the right way + if not has_token_sequence(code, ['min']) or \ + not has_token_sequence(code, ['max']): + return [{'id': 'median'}] + + # program is working correctly for mean but not for median + if '2' in answer[0][1] and '1' not in answer[0][1]: + return [{'id': 'median'}] + + # student is not using print function + if not has_token_sequence(code, ['print']): + return [{'id' : 'printing'}] + + return None diff --git a/python/problems/introduction/average/en.py b/python/problems/introduction/average/en.py new file mode 100644 index 0000000..72e83aa --- /dev/null +++ b/python/problems/introduction/average/en.py @@ -0,0 +1,16 @@ +# coding=utf-8 + +id = 1000 +name = 'Pythagorean theorem' +slug = 'Pythagorean theorem' + +description = '''\ +

(translation missing)''' + +hint = { + 'plan': '''\ +

(translation missing)

''', + + 'no_input_call': '''\ +

(translation missing)

''', +} diff --git a/python/problems/introduction/average/sl.py b/python/problems/introduction/average/sl.py new file mode 100644 index 0000000..2824320 --- /dev/null +++ b/python/problems/introduction/average/sl.py @@ -0,0 +1,90 @@ +# coding=utf-8 + +id = 189 +name = 'Povprečna ocena' +slug = 'Povprečna ocena' + +description = '''\ +

Napiši program, ki mu uporabnik vpiše oceno, ki so jo pri matematiki dobili Ana, Benjamin in Cilka. +Program naj izračuna in izpiše povprečno oceno ter srednjo vrednost. Sprogramiraj slednjo brez +uporabe pogojnih stavkov ali česa podobno "naprednega". Konkretno, uporabljaj le funkcije input, +print, min in max. Namig: min in max lahko prejmeta poljubno število argumentov. Pomisli tudi na +to, da imaš samo tri osebe; pri štirih ta trik ne bi vžgal. Primer izvajanja programa:

+
+Ocena [Ana]? 2
+Ocena [Benjamin]? 4
+Ocena [Cilka]? 5
+Povpreče: 3.6666666666666665
+Srednja vrednost: 4.0
+
+''' + +general_exception = { + 'error_head' : '''\ +

Napaka:

+
+[%=message%]
+
+''', + + 'general': ''' +

Pri razumevanju napake sta pomembni dve vrstici. V predzadnji vrstici je napisana lokacija + napake (line ...), v zadnji vrstici pa izvemo za kakšno napako gre.

+ ''', + + 'name_error' : ''' +

Napaka NameError pomeni, da uporabljate nedefinirano vrednost: + ali vrednost spremenljivke ni določena ali uporabljate funkcijo, ki ni uvožena.

+ ''', + + 'type_error': ''' +

TypeError napaka pomeni, da želite izvesti operacijo na nedovoljenih tipih. + Npr., če želite sešteti niz in število ali klicati funkcijo, čeprav tisto ni funkcija, itd. .

+ ''', +} + +hint = { + 'plan': '''\ +

Ista strategija kot pri predhodnih nalogah: 1) preberi ocene Ane, Benjamina in Cilke, 2) izračunaj +povprečno vrednost in srednjo vrednost ter 3) izpiši.

+''', + + 'average': ''' +

Povprečje izračunamo kot vsoto vseh elementov, ki jo delimo s številom elementov. Konkretno v +našem primeru:

+
+p = (a + b + c) / 3
+
+''', + + 'median': ''' +

Če imamo samo 3 vrednosti in odstranimo najmanjšo in največjo vrednost, nam ostane srednja +vrednost. V programu to najlažje izvedemo tako, da vrednosti seštejemo in potem vsoti odštejemo +najmanjšo in največjo vrednost.

+''', + + 'printing': ''' +

V Pythonu izpisujemo s funkcijo print. Če želimo izpisati več elementov, +jih ločimo z vejico. Recimo, da imamo spremenljivko ime, +ki vsebuje naše ime, potem lahko napišemo: +

+print("Ime mi je", ime, ".")
+
''', + + 'name_error' : [general_exception['error_head'], general_exception['general'], + general_exception['name_error'], ''' +

Verjetno uporabljate spremenljivko, ki nima vrednosti. Ali v izrazu za izračun + uporabljate napačno spremenljivko? Ali pri izpisu morda poskušate + izpisati napačno spremenljivko?

'''], + + 'type_error' : [general_exception['error_head'], general_exception['general'], + general_exception['type_error'], ''' +

Verjetni razlog: funkcija input vrača vrednost tipa niz, +ki jo moramo najprej pretvoriti v tip float, če želimo z njo računati:

+
+v = float(input(" ...
+
+'''], + + 'error' : [general_exception['error_head'], general_exception['general'],] +} diff --git a/python/problems/introduction/ballistics/sl.py b/python/problems/introduction/ballistics/sl.py index 9150444..15b02be 100644 --- a/python/problems/introduction/ballistics/sl.py +++ b/python/problems/introduction/ballistics/sl.py @@ -32,15 +32,8 @@ general_exception = { ''', 'name_error' : ''' -

Napaka tipa NameError označuje, da uporabljate nedefinirano vrednost:

-