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scientific-programming-exercises
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initial work on exam ex 3

gol
Daniel Knüttel 2019-01-31 17:51:05 +01:00
parent f7693ee0a4
commit 9941073813
6 changed files with 514 additions and 0 deletions
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27
exam/ex3/callbacks.py 100644
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from settings import load_words_from_file, manually_add_question, save_questions_to_file
class CallbackHandler(object):
def __init__(self, gtk_builder):
self.builder = gtk_builder
def on_manually_add_submit_button_clicked(self, widget):
question_view = self.builder.get_object("add_question_question_view")
answer_view = self.builder.get_object("add_question_answer_view")
question = question_view.get_text()
answer = answer_view.get_text()
manually_add_question(question, answer)
def on_load_from_file_submit_button_clicked(self, widget):
file_chooser = self.builder.get_object("load_from_file_chooser")
file_name = file_chooser.get_filename()
load_words_from_file(file_name)
def on_save_question_to_file_submit_button_clicked(self, widget):
file_chooser = self.builder.get_object("save_questions_to_file_chooser")
file_name = file_chooser.get_filename()
save_questions_to_file(file_name)

4
exam/ex3/cfg.py 100644
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config = {"APP_PATH": "."
, "WORD_BUCKET_SIZE": 5
}

67
exam/ex3/database.py 100644
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import os
import sqlite3
import random
from cfg import config
database_path = os.path.join(config["APP_PATH"], "app.sqlite")
def create_database():
# truncate the file if it exists
with open(database_path, "w") as database_file:
pass
db = sqlite3.connect(database_path)
db.execute('''CREATE TABLE QUESTIONS(question TEXT, answer TEXT, correct INT)''')
db.close()
def open_database():
if(not os.path.exists(database_path)):
create_database()
return sqlite3.connect(database_path)
def update_correct(question, correct):
"""
Correct has to be +1 (for a correct answer) or -1 (for a wrong answer).
"""
db = open_database()
cursor = db.cursor()
cursor.execute("UPDATE QUESTIONS SET correct=correct + ? WHERE question = ?", (correct, question))
db.close()
def add_word(question, answer):
db = open_database()
cursor = db.cursor()
cursor.execute("INSERT INTO QUESTIONS(question, answer, correct) VALUES(?, ?, 0)", (question, answer))
db.close()
def add_words(input_data):
db = open_database()
cursor = db.cursor()
cursor.executemany("INSERT INTO QUESTIONS(question, answer, correct) VALUES(?, ?, 0)", input_data.items())
db.close()
print("added words")
def fetch_question():
db = open_database()
cursor = db.cursor()
cursor.execute("SELECT COUNT(question) FROM questions")
number_of_questions = cursor.fetchone()[0]
if(number_of_questions == 0):
raise Exception("No questions in the database")
fetch_questions = number_of_questions // config["WORD_BUCKET_SIZE"]
if(fetch_questions == 0):
fetch_questions = 1
cursor.execute("SELECT question, answer, correct FROM QUESTIONS SORT BY correct")
result = cursor.fetch(fetch_questions)
my_result = random.choice(result)
return result[:2]

363
exam/ex3/main.glade 100644
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<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.20.0 -->
<interface>
<requires lib="gtk+" version="3.20"/>
<object class="GtkWindow" id="window1">
<property name="can_focus">False</property>
<signal name="destroy" handler="onDestroy" swapped="no"/>
<child>
<object class="GtkNotebook">
<property name="visible">True</property>
<property name="can_focus">True</property>
<child>
<object class="GtkBox">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="orientation">vertical</property>
<child>
<object class="GtkLabel" id="question_view">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="label" translatable="yes">Question</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">0</property>
</packing>
</child>
<child>
<object class="GtkEntry" id="answer_view">
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="placeholder_text" translatable="yes">Answer</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">1</property>
</packing>
</child>
<child>
<object class="GtkBox">
<property name="visible">True</property>
<property name="can_focus">False</property>
<child>
<placeholder/>
</child>
<child>
<object class="GtkButton" id="submit_answer_button">
<property name="label" translatable="yes">Submit Answer</property>
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="receives_default">True</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">1</property>
</packing>
</child>
<child>
<placeholder/>
</child>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">2</property>
</packing>
</child>
<child>
<object class="GtkBox">
<property name="visible">True</property>
<property name="can_focus">False</property>
<child>
<object class="GtkBox">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="orientation">vertical</property>
<child>
<object class="GtkLabel" id="answer_was_correct_view">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="label" translatable="yes">No question has been answered </property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">0</property>
</packing>
</child>
<child>
<object class="GtkLabel" id="correct_answer_view">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="label" translatable="yes">No question has been answered </property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">1</property>
</packing>
</child>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">0</property>
</packing>
</child>
<child>
<object class="GtkButton" id="next_question_button">
<property name="label" translatable="yes">Next Question</property>
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="receives_default">True</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">1</property>
</packing>
</child>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">3</property>
</packing>
</child>
<child>
<placeholder/>
</child>
</object>
</child>
<child type="tab">
<object class="GtkLabel" id="exercise_frame">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="label" translatable="yes">Exercises</property>
</object>
<packing>
<property name="tab_fill">False</property>
</packing>
</child>
<child>
<object class="GtkBox">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="orientation">vertical</property>
<child>
<object class="GtkBox">
<property name="visible">True</property>
<property name="can_focus">False</property>
<child>
<object class="GtkLabel">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="label" translatable="yes">Load questions from file</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">0</property>
</packing>
</child>
<child>
<object class="GtkFileChooserButton" id="load_from_file_chooser">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="title" translatable="yes"/>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">1</property>
</packing>
</child>
<child>
<object class="GtkButton" id="load_from_file_submit_button">
<property name="label" translatable="yes">Submit</property>
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="receives_default">True</property>
<signal name="clicked" handler="on_load_from_file_submit_button_clicked" swapped="no"/>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">2</property>
</packing>
</child>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">0</property>
</packing>
</child>
<child>
<object class="GtkSeparator">
<property name="visible">True</property>
<property name="can_focus">False</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">1</property>
</packing>
</child>
<child>
<object class="GtkBox">
<property name="visible">True</property>
<property name="can_focus">False</property>
<child>
<object class="GtkLabel">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="label" translatable="yes">Manually add question</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">0</property>
</packing>
</child>
<child>
<object class="GtkBox">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="orientation">vertical</property>
<child>
<object class="GtkEntry" id="add_question_question_view">
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="placeholder_text" translatable="yes">Question</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">0</property>
</packing>
</child>
<child>
<object class="GtkEntry" id="add_question_answer_view">
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="placeholder_text" translatable="yes">Answer</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">1</property>
</packing>
</child>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">1</property>
</packing>
</child>
<child>
<object class="GtkButton" id="manually_add_submit_button">
<property name="label" translatable="yes">Submit</property>
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="receives_default">True</property>
<signal name="clicked" handler="on_manually_add_submit_button_clicked" swapped="no"/>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">2</property>
</packing>
</child>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">2</property>
</packing>
</child>
<child>
<object class="GtkSeparator">
<property name="visible">True</property>
<property name="can_focus">False</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">3</property>
</packing>
</child>
<child>
<object class="GtkBox">
<property name="visible">True</property>
<property name="can_focus">False</property>
<child>
<object class="GtkLabel">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="label" translatable="yes">Save questions to file</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">0</property>
</packing>
</child>
<child>
<object class="GtkFileChooserButton" id="save_questions_to_file_chooser">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="title" translatable="yes"/>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">1</property>
</packing>
</child>
<child>
<object class="GtkButton" id="save_question_to_file_submit_button">
<property name="label" translatable="yes">Submit</property>
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="receives_default">True</property>
<signal name="clicked" handler="on_save_question_to_file_submit_button_clicked" swapped="no"/>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">2</property>
</packing>
</child>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">4</property>
</packing>
</child>
</object>
<packing>
<property name="position">1</property>
</packing>
</child>
<child type="tab">
<object class="GtkLabel" id="settings_frame">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="label" translatable="yes">Settings</property>
</object>
<packing>
<property name="position">1</property>
<property name="tab_fill">False</property>
</packing>
</child>
</object>
</child>
</object>
</interface>

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exam/ex3/main.py 100644
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import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
from callbacks import CallbackHandler
builder = Gtk.Builder()
builder.add_from_file("main.glade")
callback_handler = CallbackHandler(builder)
handlers = {
"onDestroy": Gtk.main_quit
, "on_manually_add_submit_button_clicked": callback_handler.on_manually_add_submit_button_clicked
, "on_load_from_file_submit_button_clicked": callback_handler.on_load_from_file_submit_button_clicked
, "on_save_question_to_file_submit_button_clicked": callback_handler.on_save_question_to_file_submit_button_clicked
}
builder.connect_signals(handlers)
window = builder.get_object("window1")
window.show_all()
Gtk.main()

27
exam/ex3/settings.py 100644
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import os
import json
from database import add_word, add_words, open_database
def load_words_from_file(file_name):
if(not os.path.exists(file_name)):
raise Exception("File does not exist")
with open(file_name) as fin:
data = {line[0]: line[1] for line in
[ line.split() for line in fin if line]
if len(line) == 2}
print("adding", data)
add_words(data)
def manually_add_question(question, answer):
add_word(question, answer)
def save_questions_to_file(file_name):
db = open_database()
with open(file_name) as fout:
cursor = db.cursor()
cursor.execute("SELCT question, answer, correct FROM QUESTIONS")
data = [{"question":i[0], "answer": i[1], "correct": i[2]} for i in cursor.fetchall()]
json.dump(fout)
db.close()