我正在使用此代码从外部程序获取标准输出:
>>> from subprocess import *
>>> command_stdout = Popen(['ls', '-l'], stdout=PIPE).communicate()[0]
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communic()方法返回一个字节数组:
>>> command_stdout
b'total 0\n-rw-rw-r-- 1 thomas thomas 0 Mar 3 07:03 file1\n-rw-rw-r-- 1 thomas thomas 0 Mar 3 07:03 file2\n'
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但是,我想将输出作为普通的Python字符串.所以我可以这样打印:
>>> print(command_stdout)
-rw-rw-r-- 1 thomas thomas 0 Mar 3 07:03 file1
-rw-rw-r-- 1 thomas thomas 0 Mar 3 07:03 file2
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我认为这是binascii.b2a_qp()方法的用途,但是当我尝试它时,我又得到了相同的字节数组:
>>> binascii.b2a_qp(command_stdout)
b'total 0\n-rw-rw-r-- 1 thomas thomas 0 Mar 3 07:03 file1\n-rw-rw-r-- 1 thomas thomas 0 Mar 3 07:03 file2\n'
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有人知道如何将字节值转换回字符串吗?我的意思是,使用"电池"而不是手动操作.而且我希望它能用于Python 3.
我还没有找到有办法做到这一点.假设我收到一个像这样的JSON对象:
{'1_data':{'4_data':[{'5_data':'hooray'}, {'3_data':'hooray2'}], '2_data':[]}}
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很难立即说出,我应该如何从3_data键获得价值:data['1_data']['4_data'][1]['3_data']
我知道pprint,它有助于理解结构.但有时数据量巨大,需要时间
有什么方法可以帮助我吗?
我知道如何在知道键值的情况下解析 JSON,但现在我想从不是我的 JSON 中获取键值,所以我可以知道键名,例如我有这个 JSON
[
{
"id": 1,
"name": "Leanne Graham",
"username": "Bret",
"email": "Sincere@april.biz",
"address": {
"street": "Kulas Light",
"suite": "Apt. 556",
"city": "Gwenborough",
"zipcode": "92998-3874",
"geo": {
"lat": "-37.3159",
"lng": "81.1496"
}
},
"phone": "1-770-736-8031 x56442",
"website": "hildegard.org",
"company": {
"name": "Romaguera-Crona",
"catchPhrase": "Multi-layered client-server neural-net",
"bs": "harness real-time e-markets"
}
},
{
"id": 2,
"name": "Ervin Howell",
"username": "Antonette",
"email": "Shanna@melissa.tv",
"address": {
"street": "Victor Plains",
"suite": "Suite 879",
"city": "Wisokyburgh",
"zipcode": "90566-7771",
"geo": {
"lat": …Run Code Online (Sandbox Code Playgroud)