Python-将字节数组转换为JSON格式
我想将bytes
数组转换为JSON格式。这是我的来源:
my_bytes_value = b'[{\'Date\': \'2016-05-21T21:35:40Z\', \'CreationDate\': \'2012-05-05\', \'LogoType\': \'png\', \'Ref\': 164611595, \'Classe\': [\'Email addresses\', \'Passwords\'],\'Link\':\'http://some_link.com\'}]'
这是我想要的期望结果:
[{"Date": "2016-05-21T21:35:40Z",
"CreationDate": "2012-05-05",
"LogoType": "png",
"Ref": 164611595,
"Classes": [
"Email addresses",
"Passwords"
],
"Link": "http://some_link.com"}]
首先,我将字节转换为字符串:
my_new_string_value = my_bytes_value.decode("utf-8")
但是当我尝试加载到JSON时:
my_json = json.loads(my_new_string_value)
我收到此错误:
json.decoder.JSONDecodeError: Expecting value: line 1 column 174 (char 173)
回答:
您的bytes
对象 几乎 是JSON,但是它使用单引号而不是双引号,并且它必须是字符串。因此,解决该问题的一种方法是解码bytes
to
str
并替换引号。另一种选择是使用ast.literal_eval
;
有关详情,请参见下文。如果要打印结果或将其作为有效JSON保存到文件中,则可以将JSON加载到Python列表中,然后将其转储出去。例如,
import jsonmy_bytes_value = b'[{\'Date\': \'2016-05-21T21:35:40Z\', \'CreationDate\': \'2012-05-05\', \'LogoType\': \'png\', \'Ref\': 164611595, \'Classe\': [\'Email addresses\', \'Passwords\'],\'Link\':\'http://some_link.com\'}]'
# Decode UTF-8 bytes to Unicode, and convert single quotes
# to double quotes to make it valid JSON
my_json = my_bytes_value.decode('utf8').replace("'", '"')
print(my_json)
print('- ' * 20)
# Load the JSON to a Python list & dump it back out as formatted JSON
data = json.loads(my_json)
s = json.dumps(data, indent=4, sort_keys=True)
print(s)
[{"Date": "2016-05-21T21:35:40Z", "CreationDate": "2012-05-05", "LogoType": "png", "Ref": 164611595, "Classe": ["Email addresses", "Passwords"],"Link":"http://some_link.com"}]- - - - - - - - - - - - - - - - - - - -
[
{
"Classe": [
"Email addresses",
"Passwords"
],
"CreationDate": "2012-05-05",
"Date": "2016-05-21T21:35:40Z",
"Link": "http://some_link.com",
"LogoType": "png",
"Ref": 164611595
}
]
正如Antti
Haapala在评论中提到的那样,一旦我们将其解码为字符串,就可以ast.literal_eval
用来转换my_bytes_value
为Python列表。
from ast import literal_evalimport json
my_bytes_value = b'[{\'Date\': \'2016-05-21T21:35:40Z\', \'CreationDate\': \'2012-05-05\', \'LogoType\': \'png\', \'Ref\': 164611595, \'Classe\': [\'Email addresses\', \'Passwords\'],\'Link\':\'http://some_link.com\'}]'
data = literal_eval(my_bytes_value.decode('utf8'))
print(data)
print('- ' * 20)
s = json.dumps(data, indent=4, sort_keys=True)
print(s)
通常,出现此问题是因为有人通过打印Python
repr
而不是使用json
模块创建正确的JSON数据来保存数据。如果可能的话,最好解决该问题,以便首先创建正确的JSON数据。
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