Before discovering http://quizlet.com/, the following program was developed for running custom quizzes to help with studying for college courses. The program is not very advanced, but it works reasonably well for what it was designed to do. If the program were developed further, it would need greater capabilities than it currently has and would require a secondary system for actually creating the quizzes (currently, they are hand-typed). Quiz Me could be a starting point for anyone who wishes to actually write a program such as this and inspire others to write much better programs than what this recipe currently offers.
This is the main entry point to the Quiz Me program. It creates the GUI context and sets the program up for automatic error logging. Experimental threading support is provided but unused in the program. Since the main application subclasses a frame, it can easily be embedded in another application without much difficulty. Quiz Me is entirely event based and has an event runner in the very last method shown here.
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source.main() # and execute main.
####################
# source/__init__.py
####################
import tkinter, time, os, sys, test.support
import xml.sax._exceptions
from tkinter import Label, Frame, LabelFrame, Entry, Button
from tkinter.filedialog import askopenfilename
from tkinter.messagebox import showinfo, showwarning, showerror
from . import exe_queue, gui_logs, splash, teach_me, testbank
################################################################################
def main():
with test.support.captured_output('stderr') as stderr:
tkinter.NoDefaultRoot()
root = tkinter.Tk()
with splash.Splash(root, 'images//QuizMe Logo.gif', 3):
# Set up the root window.
root.title('QuizMe 2.5')
root.resizable(False, False)
root.wm_iconbitmap(default='images//Icon.ico')
# Create the program GUI.
application = QuizMe(root)
application.grid()
mainloop(root)
cleanup(stderr)
def mainloop(root):
# Threading Support Experiment
gui_logs.root = exe_queue.Pipe(root)
while True:
try:
root.update()
except:
return
time.sleep(1 / 64)
gui_logs.root.update()
def cleanup(stream):
# Record Any Errors
value = stream.getvalue()
if value:
today = time.asctime()
ruler = '=' * len(today)
stamp = '{1}\n{0}\n{1}\n'.format(today, ruler)
file = open('error.log', 'at')
file.write(stamp)
file.write(value)
file.close()
################################################################################
class QuizMe(Frame):
PROMPT = 'What testbank do you want to open?'
def __init__(self, master):
# Initialize the Frame object.
super().__init__(master)
# Create every opening widget.
self.intro = Label(self, text=self.PROMPT)
self.group = LabelFrame(self, text='Filename')
self.entry = Entry(self.group, width=35)
self.click = Button(self.group, text='Browse ...', command=self.file)
self.enter = Button(self, text='Continue', command=self.start)
# Make Windows entry bindings.
def select_all(event):
event.widget.selection_range(0, tkinter.END)
return 'break'
self.entry.bind('<Control-Key-a>', select_all)
self.entry.bind('<Control-Key-/>', lambda event: 'break')
# Position them in this frame.
options = {'sticky': tkinter.NSEW, 'padx': 5, 'pady': 5}
self.intro.grid(row=0, column=0, **options)
self.group.grid(row=1, column=0, **options)
self.entry.grid(row=0, column=0, **options)
self.click.grid(row=0, column=1, **options)
self.enter.grid(row=2, column=0, **options)
def file(self):
# Find filename for self.entry
options = {'defaultextension': '.xml',
'filetypes': [('All', '*'), ('XML', '.xml')],
'initialdir': os.path.join(os.getcwd(), 'tests'),
'parent': self,
'title': 'Testbank to Open'}
filename = askopenfilename(**options)
if filename:
self.entry.delete(0, tkinter.END)
self.entry.insert(0, filename)
def start(self):
# Validate self.entry and begin
path = self.entry.get()
if os.path.exists(path):
if os.path.isfile(path):
try:
bank = testbank.parse(path)
engine = teach_me.FAQ(bank)
except xml.sax._exceptions.SAXParseException as error:
title = error.getMessage().title()
LN = error.getLineNumber()
CN = error.getColumnNumber()
message = 'Line {}, Column {}'.format(LN, CN)
showerror(title, message, master=self)
except AssertionError as error:
title = 'Validation Error'
message = error.args[0]
showerror(title, message, master=self)
except:
title = 'Error'
message = 'Unknown exception was thrown!'
showerror(title, message, master=self)
else:
self.done = False
self.next_event = iter(engine).__next__
self.after_idle(self.execute_quiz)
else:
title = 'Warning'
message = 'File does not exist.'
showwarning(title, message, master=self)
else:
title = 'Information'
message = 'Path does not exist.'
showinfo(title, message, master=self)
def execute_quiz(self):
# Follow the logic from the last program.
# This will be called to handle an event.
try:
event = self.next_event()
except StopIteration:
assert self.done, 'Final event not processed!'
else:
if isinstance(event, teach_me.Enter):
gui_logs.ShowStatus(self, 'Entering', event, self.execute_quiz)
elif isinstance(event, teach_me.Exit):
gui_logs.ShowStatus(self, 'Exiting', event, self.execute_quiz)
self.last_exit = event.kind
elif isinstance(event, teach_me.Question):
gui_logs. AskQuestion(self, event, self.execute_quiz)
elif isinstance(event, teach_me.Report):
flag = [True]
if self.last_exit == 'Section' and event.wrong:
flag[0] = False
gui_logs.ReviewProblems(self, event, flag)
if flag[0]:
gui_logs.ShowReport(self, event, self.execute_quiz)
if event.final:
title = 'Congratulations!'
message = 'You have finished the test.'
showinfo(title, message, master=self)
self.done = True
else:
title = 'Type Error'
message = repr(event)
showerror(title, message, master=self)
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