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python读取Android permission文件

Jun 16, 2016 am 08:46 AM
android json python

今天用python解析一个文本文件,格式如下:

复制代码 代码如下:

[
    {
        "Key":"android.permission.ACCESS_CHECKIN_PROPERTIES",
        "Title":"访问检入属性",
        "Memo":"允许对检入服务上传的属性进行读/写访问。普通应用程序不能使用此权限。",
        "Level":0
    },
    {
        "Key":"android.permission.ACCESS_COARSE_LOCATION",
        "Title":"大概位置",
        "Memo":"访问大概的位置源(例如蜂窝网络数据库)以确定手机的大概位置(如果可以)。恶意应用程序可借此确定您所处的大概位置。",
        "Level":1
    },
    {
        "Key":"android.permission.ACCESS_COARSE_LOCATION",
        "Title":"大概位置",
        "Memo":"访问大概的位置源(例如蜂窝网络数据库)以确定手机的大概位置(如果可以)。恶意应用程序可借此确定您所处的大概位置。",
        "Level":1
    }
]

开始采用open('filepath').readlines()的方法读取,这样读取的内容都存取到一个列表中,但是我要取每一个{}中的内容取不到,于是考虑用split(',')的方法分离开来,结果把每一个{}里面的内容也根据","分开了。后来请教了网友,说用json方式读取。于是采用以下方式:
复制代码 代码如下:

#-*-encoding:utf-8-*-
import json
f = file(r'C:\Users\Tim\Desktop\test.json')
jsonobj = json.load(f)
#列表用序号来查询
print jsonobj[0]['Memo']
f.close

运行之后报以下错误:
ValueError: No JSON object could be decoded
重新将json文件以UTF8无BOM方式保存了一下,运行成功了。另外,对于读取json string可以用以下方式:
复制代码 代码如下:

s = json.loads('{"name":"test", "type":{"name":"seq", "parameter":["1", "2"]}}')
print s
print s.keys()
print s["name"]
print s["type"]["name"]
print s["type"]["parameter"][1]

下面给出完整的读取permission文件的代码:
复制代码 代码如下:

#-*-coding:utf8-*-
import json
import codecs

def getperinfo(inputper):
    f = file(r'C:\Users\Tim\Desktop\test.json')
    jsonobj = json.load(f)
    #print jsonobj[0]['Memo']
    for permission in jsonobj:
        #permission.values()获取词典的值
        if permission.values()[2] == inputper:
            print "permission name:%s\npermission info:%s" %(permission.values()[3],permission.values()[0])
    f.close

if __name__ == '__main__':
    #optparse采用预先定义好的选项来解析命令行参数,optparse默认就是解析命令行参数的。
    from optparse import OptionParser
    parser = OptionParser()
    parser.add_option("-p", "--permission", dest="permission",help="input permission")
    (options, args) = parser.parse_args()
    #options.permission为输入的permission
    getperinfo(options.permission)


执行示例如下:
python读取Android permission文件
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