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  • Exercise 41: Learning To Speak Object Oriented

    import random
    from urllib import urlopen
    import sys
    WORD_URL = "http://learncodethehardway.org/words.txt"
    WORDS = []
    
    PHRASES = {
        "class ###(###):": "Make a class named ### that is-a ###.",
        "class ###(object):
    	def __init__(self, ***)" : "class ### has-a __init__ that takes self and *** parameters.",
        "class ###(object):
    	def ***(self, @@@)": "class ### has-a function named *** that takes self and @@@ parameters.",
        "*** = ###()": "Set *** to an instance of class ###.",
        "***.***(@@@)": "From *** get the *** function, and call it with parameters self, @@@.",
        "***.*** = '***'": "From *** get the *** attribute and set it to '***'."}
    
    # do they want to drill phrases first
    PHRASE_FIRST = False
    if len(sys.argv) == 2 and sys.argv[1] == "english":
        PHRASE_FIRST = True
        
    # load up the words from the website
    for word in urlopen(WORD_URL).readlines():
        WORDS.append(word.strip())
        
    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 lists
            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 = 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
                raw_input("> ")
                print "ANSWER: %s
    
    " % answer
    except EOFError:
        print "
    Bye"

    后半部分没看懂要表达啥意思,错误在于convert 那里返回的一个list, 却有两个值。

    日后再看吧。

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  • 原文地址:https://www.cnblogs.com/hluo/p/4054161.html
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