例子中引用循环变量返回值为函数，所以会受到循环变量变化影响，任务中将返回值进行实际赋值，后续变量产生变化不对已赋值变量产生影响，不知道这么理解对不对
2020-09-24
#set方法作用，i guess
Animal('1', 1, '1')
print(dog.get_info())
dog.set_info('2',2,'2')
print(dog.get_info())
Animal('1', 1, '1')
print(dog.get_info())
dog.set_info('2',2,'2')
print(dog.get_info())
2020-09-23
L1 = ['bob', 'about', 'Zoo', 'Credit']
L2 = sorted(L1,key=str.lower)
print(L2)
L2 = sorted(L1,key=str.lower)
print(L2)
2020-09-18
已采纳回答 / 慕盖茨7031404
程序里的 self.p * r.q用来计算通分后分数的分子。这里把有理数用分数表示，有理数的运算也就成了分数的运算，如计算：1/3 + 1/5，先进行通分变成：5/15 + 3/15，这个5/15的分子就是程序里的 self.p * r.q
2020-09-17
File "index.py", line 8
SyntaxError: Non-ASCII character '\xe5' in file index.py on line 8, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details
SyntaxError: Non-ASCII character '\xe5' in file index.py on line 8, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details
2020-09-05