例子中引用循環變量返回值為函數，所以會受到循環變量變化影響，任務中將返回值進行實際賦值，后續變量產生變化不對已賦值變量產生影響，不知道這么理解對不對
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
已采納回答 / 慕蓋茨7031404
程序里的 self.p * r.q用來計算通分后分數的分子。這里把有理數用分數表示，有理數的運算也就成了分數的運算，如計算：1/3 + 1/5，先進行通分變成：5/15 + 3/15，這個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