TypeError:字符串索引必须是解析JSON的整数

Question

我在使用下面的JSON和读取数据时遇到了一些问题，在查看了其他一些问题之后，似乎没有找到解决方案，除非我遗漏了一些东西。。在

感谢帮助：）

JSON:

{"ships":{"2":{"name":"Asp","alive":true,"id":2},"3":{"starsystem":{"systemaddress":"670417429889","id":"670417429889","name":"Diaguandri"},"station":{"id":3223343616,"name":"Ray Gateway"},"name":"SideWinder","alive":true,"id":3},"12":{"starsystem":{"systemaddress":"18263140541865","id":"73228","name":"Barnard's Star"},"station":{"id":128147960,"name":"Miller Depot"},"name":"Viper_MkIV","alive":true,"id":12},"13":{"starsystem":{"systemaddress":"673101653409","id":"673101653409","name":"Brestla"},"station":{"id":3224813312,"name":"Roed Odegaard Port"},"name":"Type7","alive":true,"id":13},"14":{"starsystem":{"systemaddress":"673101653409","id":"673101653409","name":"Brestla"},"station":{"id":3224813312,"name":"Roed Odegaard Port"},"name":"SideWinder","alive":true,"id":14}}}

Python代码：

^{pr2}$

错误：

>>> shipYard()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "arg_test_ship.py", line 7, in shipYard
    ships = [item["name"] for item in data['ships']]
TypeError: string indices must be integers

Answer 1

您缺少的问题是data['ships']本身就是另一个dictionary对象。当您像在shipYard（）中那样遍历字典时，您只会得到键：

^{1}$

您想要访问字典中的name属性，为此您将使用字典.items（）方法：

^{pr2}$

或者，如果不需要索引，请使用dictionary values（）方法：

>>> ships = [item['name'] for item in data['ships'].values()]
>>> ships
9: [u'Viper_MkIV', u'SideWinder', u'Asp', u'Type7', u'SideWinder']
>>>