Added random_question.py with basic usage (#164)

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import random
import optparse
def main():
""" Reads through README.md for question/answer pairs and adds them to a list to randomly select from and quiz yourself.
- supports skipping quesitons with no documented answer with the -s flag
"""
parser = optparse.OptionParser()
parser.add_option("-s", "--skip", action="store_true",help="skips questions without an answer.", default=False)
options, args = parser.parse_args()
with open('README.md', 'r') as f:
text = f.read()
questions = []
while True:
question_start = text.find('<summary>') + 9
question_end = text.find('</summary>')
answer_end = text.find('</b></details>')
if answer_end == -1:
break
question = text[question_start: question_end].replace('<br>', '').replace('<b>', '')
answer = text[question_end + 17: answer_end]
questions.append((question, answer))
text = text[answer_end + 1:]
num_questions = len(questions)
while True:
try:
question, answer = questions[random.randint(0, num_questions)]
if options.skip and not answer.strip():
continue
if input(f'Q: {question} ...Show answer? "y" for yes: ').lower() == 'y':
print('A: ', answer)
except KeyboardInterrupt:
break
print("\nGoodbye! See you next time.")
if __name__ == '__main__':
main()