>>> k = 'good blue sky'
>>> k.capitalize()
'Good blue sky'
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报错的是因为你创建的不是字符串，可能是一个列表！
类似这样：
>>> ss = ['mode','in','china']
>>> ss.capitlize()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'list' object has no attribute 'capitlize'
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那么就要进行修改啦：
>>> [string.capitalize() for string in ss]
['Mode', 'In', 'China']
>>>
把列表变成sting就行啦！
类似集合，元组，字典都可以！
以下为示例：
>>> d = {'sd','blue'}#集合
>>> d.capitlize()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'set' object has no attribute 'capitlize'
>>> [string.capitalize() for string in d]
['Blue', 'Sd']
>>> c = ('asd','blue')#元组
>>> c.capitalize()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'tuple' object has no attribute 'capitalize'
>>> [string.capitalize() for string in c]
['Asd', 'Blue']
>>>
>>> a = {'abc':'wsd','ews':'edr'}#字典
>>> a.capitalize()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'dict' object has no attribute 'capitalize'
>>> [string.capitalize() for string in a]
['Abc', 'Ews']
>>>
奈斯