习题41 学习面向对象术语

最新推荐文章于 2026-01-05 17:14:56 发布

原创最新推荐文章于 2026-01-05 17:14:56 发布 · 73 阅读

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#python

该脚本是一个Python练习程序，它从网上获取单词列表，然后使用这些单词来生成关于面向对象编程(OOP)的概念问题和答案，涉及类的定义、初始化方法、函数等。用户可以选择先显示问题或答案进行交互式学习。

学习目标：

oop_test,py

学习内容：

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 __inti__(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 it with params self, @@@.",
     "***.*** = '***'":
      "From *** get the *** attribute and set it to '***'."
}

# do they want to dril 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 class_names
        for word in class_names:
            result = result.replace("%%%", word, 1)

        # fake other class_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 = 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")