From 969812724912512740dbf037940a9e6770df19ed Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20Mo=C5=BEina?= Date: Thu, 6 Oct 2016 12:55:26 +0200 Subject: Added recursion exercises. --- python/problems/introduction/leap_year/common.py | 93 ++++++++++++++++++++++++ python/problems/introduction/leap_year/en.py | 15 ++++ python/problems/introduction/leap_year/sl.py | 65 +++++++++++++++++ 3 files changed, 173 insertions(+) create mode 100644 python/problems/introduction/leap_year/common.py create mode 100644 python/problems/introduction/leap_year/en.py create mode 100644 python/problems/introduction/leap_year/sl.py (limited to 'python/problems/introduction/leap_year') diff --git a/python/problems/introduction/leap_year/common.py b/python/problems/introduction/leap_year/common.py new file mode 100644 index 0000000..7dc7318 --- /dev/null +++ b/python/problems/introduction/leap_year/common.py @@ -0,0 +1,93 @@ +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 +import re + +id = 20107 +number = 7 +visible = True + +solution = '''\ +leto = int(input("Vnesi leto: ")) +if leto % 4 == 0 and (leto % 100 != 0 or leto % 400 == 0): + print("Je prestopno") +else: + print("Ni prestopno") +''' + +hint_type = { + 'mod_expression': Hint('mod_expression'), + 'printing': Hint('printing'), + 'name_error': Hint('name_error'), + 'unsupported_operand': Hint('unsupported_operand'), + 'final_hint': Hint('final_hint'), +} + +def test(python, code): + # List of inputs: (expression to eval, stdin). + test_in = [ + (None, '1900\n'), + (None, '1950\n'), + (None, '2000\n'), + (None, '2016\n'), + (None, '2100\n'), + ] + test_out = [ + "Ni prestopno", + "Ni prestopno", + "Je prestopno", + "Je prestopno", + "Ni prestopno" + ] + + # 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 + tin = None + for i, (output, correct) in enumerate(zip(outputs, test_out)): + if correct in output: + n_correct += 1 + else: + tin = test_in[i][1] + tout = correct + + 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 + test_in = [(None, '212\n')] + answer = python(code=code, inputs=test_in, timeout=1.0) + exc = answer[0][3] + exc_hint = get_exception_desc(answer[0][3]) + if exc: + if 'NameError' in exc: + return [{'id':'name_error', 'args': {'message': exc}}] + elif 'not callable' in exc: + return [{'id':'not_callable', 'args': {'message': exc}}] + elif 'unsupported operand' in exc: + return [{'id':'unsupported_operand', 'args': {'message': exc}}] + elif 'TypeError' in exc: + return [{'id':'unsupported_operand', 'args': {'message': exc}}] + else: + return exc_hint + + # if token % not in code, we have to teach them how to + # evaluate expressions. + if (not has_token_sequence(tokens, ['%'])): + return [{'id' : 'mod_expression'}] + + # student is not using print function + if not has_token_sequence(tokens, ['print']): + return [{'id' : 'printing'}] + + return None diff --git a/python/problems/introduction/leap_year/en.py b/python/problems/introduction/leap_year/en.py new file mode 100644 index 0000000..a2419f9 --- /dev/null +++ b/python/problems/introduction/leap_year/en.py @@ -0,0 +1,15 @@ +name = '*Leap year' + +description = '''\ +

Write a program that reads a number representing a year and determines whether +this is a leap year. A leap year is divisible by 4, but not divisible by 100, +except if it is divisible also by 400. Thence years 2004, 2008, and 2000 are +leap years, while 2005 and 2100 are not.

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

(translation missing)

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

(translation missing)

''', +} diff --git a/python/problems/introduction/leap_year/sl.py b/python/problems/introduction/leap_year/sl.py new file mode 100644 index 0000000..236e761 --- /dev/null +++ b/python/problems/introduction/leap_year/sl.py @@ -0,0 +1,65 @@ +import server +mod = server.problems.load_language('python', 'sl') + +name = '*Prestopno leto' + +description = '''\ +

Napiši program, ki preveri ali je leto prestopno. Leto je prestopno, + če je deljivo s 4, razen v primeru, ko je deljivo s 100, + takrat leto ni prestopno, razen takrat, ko je deljivo s 400, + takrat je leto prestopno. Tako so leta 2004, 2008 in 2000 prestopna, + leti 2005 in 2100 pa ne.

+ +

Če je leto prestopno, naj izpiše "Je prestopno", če ni, "Ni prestopno". ''' + +printing = ['''\ +

V Pythonu izpisujemo s funkcijo print.

''', + '''\ +

Če želimo izpisati več elementov, jih ločimo z vejico. +Imejmo spremenljivko ime, ki vsebuje naše ime, potem: +
+print("Ime mi je", ime, ".")
+
'''] + +mod_expression = ['''\ +

Ostanek pri deljenju dobiš z operatorjem %.'''] + +plan = ['''\ +

1. Preberi vrednost 2.izračunaj 3.izpiši.

''', + mod_expression, + printing + +] +hint = { + + 'mod_expression': mod_expression, + + 'printing': printing, + + 'name_error' : [ + mod.general_msg['error_head'], + mod.general_msg['general_exception'], + mod.general_msg['name_error'], + '''\ +

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

''' + ], + + 'unsupported_operand' : [ + mod.general_msg['error_head'], + mod.general_msg['general_exception'], + mod.general_msg['type_error'], + '''\ +

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

+
+v = int(input(" ...
+
''',], + + 'final_hint' : [ + '''\ +

Odlično, program deluje!
+'''] +} -- cgit v1.2.1