We will now put all the pieces together into actual command line application.
The design is already laid out for us, all we need is the implementation.
Exercise 1:
Implement an MVP of the command line interface using python's argparse library. You don't need to implement all the flags.
Remember that it is defined in
SPC-cmd.
My Implementation
Add the following to flash/__init__.py
from __future__ import print_function
import argparse
from flash import quiz
from flash import load
def ask_question(question):
"""ask a question of the user.
returns True if the answer is correct
partof: #SPC-quiz-ask
"""
answer = raw_input("{}?: ".format(
question.question)).strip().lower()
return answer == question.answer
def main(cwd, argv):
"""The executable that is called by the binary.
partof: #SPC-cmd
"""
parser = argparse.ArgumentParser(
prog='flash',
description='flash card quizzer')
parser.add_argument(
'file',
help='csv file to get quiz questions from')
args = parser.parse_args(argv[1:])
questions = load.load_path(args.file)
answered = quiz.Answered()
msg = "Starting Quiz {}. Press Ctrl+C to quit."
print(msg.format(args.file))
while True:
question = quiz.get_question(
questions, answered)
result = ask_question(question)
# see: #SPC-response
if result:
print("* Correct! Good job\n")
else:
msg = "X Incorrect."
msg += " The correct answer is: "
print(msg, question.answer, "\n")
answered.record(question, result)
Now create a file at bin/flash and write the following:
#!/usr/bin/python2
import os
import sys
import flash
if __name__ == '__main__':
flash.main(os.getcwd(), sys.argv)
Then run the following:
note:
exportwon't work on Windows. Instead run the following or see this guide:set PYTHONPATH=%PYTHONPATH%;%cd%
export PYTHONPATH=$(pwd)
python bin/flash capitols.csv
note: for linux you can also make
bin/flashexecutable withchmod a+x bin/flashand then you don't needpythonin front of it.
Congratulations - you have designed, developed and tested a full blown application!