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class_ex1.py
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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 __init__ that takes self and *** parameters.",
"class %%%(object):\n\tdef ***(self, @@@)":
"class %%% has-a function *** that takes self and @@@ parameters.",
"*** = %%%()":
"set *** to an instance of class %%%.",
"***.***(@@@)":
"From *** get the *** function, call it with parameters @@@",
"***.*** = '***'":
"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":
#print(len(sys.argv))
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):
# capitalize使得第一个字符为大写,其余为小写
# random.sample(sequence, k) 从指定序列中随机获取k个元素作为一个片段返回
# sample函数不会修改原有序列
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("@@@")):
# 随机生成1,2,3
param_count = random.randint(1, 3)
# 将生成的参数以"par1,par2,"添加到list
param_names.append(', '.join(
random.sample(WORDS, param_count)))
for sentence in snippet, phrase:
# Python way of copying a list
print(f"the sentence is : {sentence}")
result = sentence[:]
# fake class names
for word in class_names:
# str.replace(old, new, max),replace old with new ,no more than max
result = result.replace("%%%", word, 1)
# fake other names
for word in other_names:
result = result.replace("***", word, 1)
# fake paremeter list
for word in param_names:
result = result.replace("@@@", word, 1)
results.append(result)
return results
# keep going util they hit
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.")