ex41.py

import random 
from urllib.request import urlopen
import sys

WORD_URL = "http://learncodethehardway.org/words.txt"
WORDS = []

PHRASES = {
	"class %%%(%%%)": "Make a class named %%% that is-a %%%",
	"class%%%(object):\n\tdef _init_(self, ***)": "class %%% has-a _inti_ that takes self and *** params.",
	"class%%%(object):\n\tdef ***(self, @@@)": "class %%% has-a function that takes self and @@@ params.",
	"*** = %%%()": "Set *** to an instance of class %%%",
	"***.***(@@@)": "From *** get the *** function, call itwith params self, @@@",
	"***.*** = '***'": "From *** get the *** attribute and set it to '***'."
}

#do they want to drill phrases first
if len(sys.argv) == 2 and sys.argv[1] == 'english':
	PHRASE_FIRST = True 
else:
	PHRASE_FIRST = False

# load up the words from the website
for word in urlopen(WORD_URL).readlines():
	WORDS.append(str(word.strip(), encoding="UTF-8"))

def convert(snippet, phrase):
	class_names = [w.capitalize() for w in random.sample(WORDS, snippet.count("%%%"))]
	other_names = random.sample(WORDS, snippet.count("***"))
	results = []
	param_names = []

	for i in range(0, snippet.count("@@@")):
		param_count = random.randint(1,3)
		param_names,append(', '.join(random.sample(WORDS, param_count)))

	for sentence in snippet, phrase:
		result = sentence[:]

		#fake class names
		for word in class_names:
			result = result.replace("%%%", word, 1)

		#fake other names
		for word in other_names:
			result = result.replace("***", word, 1)

		#fake parameter list
		for word in param_names:
			result = result.replace("@@@", word, 1)

		results.append(result)

	return results

#keep going until they hit ctrl-D
try:
	while True:
		snippets = list(PHRASES.keys())
		random.shuffle(snippets)

		for snippet in snippets:
			phrase = PHRASES[snippet]
			question, answer = convert(snippet, phrase)
			if PHRASE_FIRST:
				question, answer = answer, question

			print(question)

			input("> ")
			print(f"ANSWER: {answer}\n\n")

except EOFError:
	print("\nBye")