Neue Generierung von moodle-formulas Fragen schon weit entwickelt. Dynamischer Aufgabenaufbau.
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@ -1,19 +1,23 @@
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import random
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import operator
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import re
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from math import gcd, lcm
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import xml.etree.ElementTree as ET
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from collections import Counter
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# Define operators and their corresponding functions
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ops = {
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'+': operator.add,
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'-': operator.sub,
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'*': operator.mul,
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'/': operator.truediv
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}
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# Konstanten
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# Anzahl der zu generierenden Fragen.
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NUM_QUESTIONS = 1
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# Algebraische Struktur der Aufgaben
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STRUCTURE = "-(+)"
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# TODO
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# Platzhalter hinzufügen
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# Anzahl der benötigten Brüche
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NUM_FRACTIONS = 1 + STRUCTURE.count("+") + STRUCTURE.count("+") + STRUCTURE.count("*") + STRUCTURE.count("/")
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STRUCTURE = "-(+)-"
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# Größter Zähler
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MAX_NUMERATOR = 20
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# Größter Nenner
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@ -23,11 +27,99 @@ MAX_COMMON_DENOMINATOR = 100
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# Dateiname für Ausgabe
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FILENAME = 'formulas_new_quiz.xml'
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def parse_expression(expression):
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"""Parse an algebraic expression and determine the required number of numbers"""
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op_count = 0
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# Count operators in parentheses
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paren_count = 1
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max_depth = 0
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for i, char in enumerate(expression):
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if char == '(':
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paren_count += 1
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elif char == ')':
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paren_count -= 1
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# Update max depth when a closed parenthesis is encountered
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max_depth = max(max_depth, paren_count)
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if char in ops.keys():
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op_count += 1
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return max_depth + op_count
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# Anzahl der benötigten Brüche
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NUM_FRACTIONS = parse_expression(STRUCTURE)
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# Platzhalter hinzufügen
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def add_placeholders(expression):
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placeholder_counter = 0 # Zähler für die Platzhalter
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def placeholder_generator():
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nonlocal placeholder_counter
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placeholder = f'n{placeholder_counter}'
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placeholder_counter += 1
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return placeholder
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output = [] # Ausgabe als Liste zum späteren Zusammensetzen
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need_placeholder = True # Flag, um zu tracken, ob ein Platzhalter hinzugefügt werden soll
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for char in expression:
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if char in '+-*/': # Operator gefunden
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if need_placeholder: # Wenn wir einen Platzhalter brauchen
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output.append(placeholder_generator())
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output.append(char) # Fügen Sie den Operator hinzu
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need_placeholder = True # Nach einem Operator müssen wir wieder einen Platzhalter hinzufügen
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elif char == '(': # Eine neue Sub-Expression beginnt
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output.append(char) # Fügen Sie die öffnende Klammer hinzu
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need_placeholder = True
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elif char == ')': # Eine Sub-Expression endet
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if need_placeholder: # Wenn wir einen Platzhalter brauchen
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output.append(placeholder_generator())
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output.append(char) # Fügen Sie die schließende Klammer hinzu
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need_placeholder = False # Nach einer schließenden Klammer erwarten wir keine Platzhalter mehr
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else: # Bei anderen Zeichen
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if need_placeholder: # Wenn wir einen Platzhalter brauchen
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output.append(placeholder_generator())
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output.append(char) # Fügen Sie das Zeichen hinzu
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need_placeholder = False # Nach einem Platzhalter sollten wir keinen weiteren setzen
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# Platzhalter am Beginn hinzufügen
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if output and output[0] != f'n{0}':
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result = [placeholder_generator()] + output
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else:
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result = output
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# Platzhalter am Ende hinzufügen, wenn nötig
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if output[-1] in '+-*/':
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result = result + [placeholder_generator()]
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else:
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pass
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# Zusammensetzen des finalen Ausdrucks
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final_expression = ''.join(result).strip()
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return final_expression
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def create_formula_question(n):
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# Algebraische Struktur mit Platzhaltern
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STRUCTURE_PH = add_placeholders(STRUCTURE)
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def calculate(expression, numbers):
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"""Calculate the result of the expression using n[0], n[1], ..."""
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# numbers = [random.randint(1, 10) for _ in range(num)]
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print(numbers)
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# Replace placeholders with actual number values
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for i, num in enumerate(numbers):
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placeholder = f'n{i}'
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expression = re.sub(rf'\{placeholder}\s*([+-/*])', rf'{num} \1', expression)
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expression = re.sub(rf'({placeholder})\s*', rf'{num}', expression)
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print(expression)
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# Evaluate the result
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return eval(expression)
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def create_formula_question(ex_number: int):
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numerators = []
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denominators = []
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for i in range(NUM_FRACTIONS):
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@ -46,8 +138,11 @@ def create_formula_question(n):
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print(numerators)
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print(denominators)
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# [DEBUG]
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# Hauptnenner bestimmen
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*denoms_integers, = denominators
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common_denominator = lcm(*denoms_integers)
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cd = common_denominator
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fractions = []
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for i in range(NUM_FRACTIONS):
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@ -57,7 +152,6 @@ def create_formula_question(n):
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print(fractions)
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# [DEBUG]
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cd = common_denominator
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expanded_numerators = [frac["n"] * cd // frac["d"] for frac in fractions]
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expanded_fractions = []
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@ -68,25 +162,127 @@ def create_formula_question(n):
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print(expanded_fractions)
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# [DEBUG]
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eval_string = f"{expanded_numerators[0]}"
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cnt_next_fraction = 1
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for c in STRUCTURE:
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if c == "(" or c ==")":
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eval_string += c
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elif c == "+" or c == "-" or c == "*" or c == "/":
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eval_string += c
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eval_string += f"{expanded_numerators[cnt_next_fraction]}"
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cnt_next_fraction += 1
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result_numerator = calculate(STRUCTURE_PH, expanded_numerators)
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# [DEBUG]
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print(eval_string)
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print(result_numerator)
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# [DEBUG]
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result_numerator = eval(eval_string)
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gcd_result = gcd(result_numerator, cd)
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if gcd_result > 1:
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# print("kürzbar")
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shortable = True
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shortened_numerator = result_numerator // gcd_result
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shortened_denominator = common_denominator // gcd_result
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else:
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shortable = False
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# Start der Aufgabe
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question = ET.Element('question', attrib={'type': 'formulas'})
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# Name der Aufgabe
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has_plus = '+' in STRUCTURE
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has_minus = '-' in STRUCTURE
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has_mult = '*' in STRUCTURE
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has_div = '/' in STRUCTURE
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if has_plus and has_minus:
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expression_type = "Addition/Subtraktion"
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exercise_text = "Berechne den Term"
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elif has_plus:
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expression_type = "Addition"
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exercise_text = "Addiere die Brüche"
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elif has_minus:
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expression_type = "Subtraktion"
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exercise_text = "Subtrahiere die Brüche"
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else:
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expression_type = "Rechnung"
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exercise_text = "Berechne den Term"
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name_elem = ET.SubElement(question, 'name')
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text_elem = ET.SubElement(name_elem, 'text')
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text_elem.text = f'{expression_type} von {NUM_FRACTIONS} ungleichnamigen Brüchen {ex_number}'
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# Allgemeiner Aufgabentext
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questiontext_elem = ET.SubElement(question, 'questiontext', attrib={'format': 'html'})
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text_elem = ET.SubElement(questiontext_elem, 'text')
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if shortable:
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text_elem.text = f"<![CDATA[ <p>{exercise_text} und kürze das Ergebnis so weit wie möglich.</p>" + "<p>{#A} </p> ]]>"
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else:
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text_elem.text = f"<![CDATA[ <p>{exercise_text}.</p>"+"<p>{#A} </p> ]]>"
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# Allgemeines Feedback
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generalfeedback_elem = ET.SubElement(question, 'generalfeedback', attrib={'format': 'html'})
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text_elem = ET.SubElement(generalfeedback_elem, 'text')
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text_elem.text = ' '
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# Grundlegende Bewertungsinformationen
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ET.SubElement(question, 'defaultgrade').text = '1.0000000'
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ET.SubElement(question, 'penalty').text = '0.3333333'
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ET.SubElement(question, 'hidden').text = '0'
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ET.SubElement(question, 'idnumber').text = ' '
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# Feedback für korrekte und inkorrekte Antworten
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correctfeedback_elem = ET.SubElement(question, 'correctfeedback', attrib={'format': 'html'})
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text_elem = ET.SubElement(correctfeedback_elem, 'text')
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text_elem.text = '''<![CDATA[ <p>Die Antwort ist richtig.</p> ]]> '''
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partiallycorrectfeedback_elem = ET.SubElement(question, 'partiallycorrectfeedback', attrib={'format': 'html'})
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text_elem = ET.SubElement(partiallycorrectfeedback_elem, 'text')
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text_elem.text = '''<![CDATA[ <p>Die Antwort ist teilweise richtig.</p> ]]> '''
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incorrectfeedback_elem = ET.SubElement(question, 'incorrectfeedback', attrib={'format': 'html'})
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text_elem = ET.SubElement(incorrectfeedback_elem, 'text')
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text_elem.text = '''<![CDATA[ <p>Die Antwort ist falsch.</p> ]]>'''
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ET.SubElement(question, 'shownumcorrect')
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varsrandom_elem = ET.SubElement(question, 'varsrandom')
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text_elem = ET.SubElement(varsrandom_elem, 'text')
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text_elem.text = f' '
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# Globale Variablen definieren
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varsglobal_elem = ET.SubElement(question, 'varsglobal')
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text_elem = ET.SubElement(varsglobal_elem, 'text')
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numerators_string = ",".join([str(n) for n in numerators])
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denominators_string = ",".join([str(d) for d in denominators])
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text_elem.text = f'n = [{numerators_string}];\n d = [{denominators_string}];'
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# Durchnummerierung der Antworten
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answernumbering_elem = ET.SubElement(question, 'answernumbering')
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text_elem = ET.SubElement(answernumbering_elem, 'text')
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text_elem.text = 'ABCD'
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# Antworten definieren
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answers_elem = ET.SubElement(question, 'answers')
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# Indizes für die Antworten
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partindex_elem = ET.SubElement(answers_elem, 'partindex')
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ET.SubElement(partindex_elem, 'text').text = '0'
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placeholder_elem = ET.SubElement(answers_elem, 'placeholder')
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ET.SubElement(placeholder_elem, 'text').text = '#A'
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# Punktzahl auf Teilaufgabe
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answermark_elem = ET.SubElement(answers_elem, 'answermark')
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if shortable:
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ET.SubElement(answermark_elem, 'text').text = '2'
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else:
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ET.SubElement(answermark_elem, 'text').text = '1'
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# Antworttyp
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answertype_elem = ET.SubElement(answers_elem, 'answertype')
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ET.SubElement(answertype_elem, 'text').text = '0'
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numbox_elem = ET.SubElement(answers_elem, 'numbox')
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ET.SubElement(numbox_elem, 'text').text = '2'
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return question
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# Berechnungsvariablen
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vars1_elem = ET.SubElement(answers_elem, 'vars1')
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if shortable:
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vars1_elem_text = "<![CDATA[ g = gcd(d[0],d[1]);\n cd = abs(d[0] * d[1]) / g;\n e = [cd / d[0], cd / d[1]];\n nums = [n[0]*e[0], n[1]*e[1]];\n thesumnum = nums[0] - nums[1];\n gcdres = gcd(thesumnum,cd);\n snum = thesumnum / gcdres;\n sdenom = cd / gcdres;]]>"
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else:
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vars1_elem_text = "<![CDATA[ g = gcd(d[0],d[1]);\ncd = abs(d[0] * d[1]) / g;\ne = [cd / d[0], cd / d[1]];\nnums = [n[0]*e[0], n[1]*e[1]];\nthesumnum = nums[0] - nums[1];]]>"
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ET.SubElement(vars1_elem, 'text').text = vars1_elem_text
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def generate_questions(num_questions):
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"""
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