import random

from urllib.request import urlopen

import sys

WORD_URL = "https://learncodethehardway.org/words.txt"

WORDS = []

# Snippets to be used as flash cards

# The keys are snippets, values are phrases

PHRASES = {

"class %%%(%%%):" :

"Make a class named %%% that is a %%%.",

"class %%%(object):\n\tdef __init__(self, ***)" :

"class %%% has-a __init__ that takes self and *** parameters.",

"class %%%(object):\n\tdef ***(self, @@@)" :

"class %%% has-a function *** that takes self and @@@ parameters.",

"*** = %%%():" :

"Set *** to be an instance of class %%%.",

"***.***(@@@)":

"From *** get the *** function, call it with params self, J.",

"***.*** = '***'":

"From *** get the *** attribute and set it to ***."

}

# if "english" is the second argument, then given sentence, answer in Python Syntax

if len(sys.argv) == 2 and sys.argv[1] == "english":

PHRASE_FIRST = True

else:

PHRASE_FIRST = False

# load the words from the website

# and some minor processing of the words

for word in urlopen(WORD_URL).readlines(): # returns a list of bytes with \n

WORDS.append(str(word.strip(), encoding = "utf-8"))

# convert the %%%, @@@ in a snippet to random words loaded previously

def convert(snippet, phrase):

# Note that by design, "%%%" is a placeholder for class name

# Note that capitalize() only capitalizes the first letter, instead of the entire word

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) # a random integer between 1 and 3, not including 3

param_names.append(', '.join(

random.sample(WORDS, param_count)))

# The first loop goes through the snippet,

# the second loop goes through the phrase

for sentence in snippet, phrase:

result = sentence[:]

# fake class names

for word in class_names:

result = result.replace("%%%", word, 1) # replace only the first occurence of %%%

# fake other names

for word in other_names:

result = result.replace("***", word, 1)

# fake parameter

for word in param_names:

result = result.replace("@@@", word, 1)

results.append(result)

return results

# keep going until hit CTRL-D

try:

while True:

# all the keys in the PHRASES dict -> list

snippets = list(PHRASES.keys())

# shuffle the list of snippets in place

random.shuffle(snippets)

for snippet in snippets:

phrase = PHRASES[snippet]

question, answer = convert(snippet, phrase)

if PHRASE_FIRST: # i.e. we want given sentence, answer with Python syntax

question, answer = answer, question

print(question)

input("> ")

print("ANSWER: {} \n\n".format(answer))

except EOFError:

print("\nBye")