{"id":131856,"date":"2020-07-05T17:58:41","date_gmt":"2020-07-05T09:58:41","guid":{"rendered":"http:\/\/4563.org\/?p=131856"},"modified":"2020-07-05T17:58:41","modified_gmt":"2020-07-05T09:58:41","slug":"python%e6%a8%a1%e5%9d%97%ef%bc%9ajson%e6%a8%a1%e5%9d%97","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=131856","title":{"rendered":"python\u6a21\u5757\uff1aJSON\u6a21\u5757"},"content":{"rendered":"

\u5728\u65e5\u5e38\u5f00\u53d1\u4e2d\uff0c\u5bf9\u6570\u636e\u8fdb\u884c\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\uff0c\u662f\u5e38\u5907\u7684\u64cd\u4f5c\u3002\u800c\u5728Python\u6807\u51c6\u5e93\u4e2d\u63d0\u4f9b\u4e86json\u6a21\u5757\u5bf9JSON\u6570\u636e\u7684\u5904\u7406\u529f\u80fd\u3002<\/p>\n

<\/a>\u4ec0\u4e48\u662fjson?<\/h3>\n

JSON\uff08JavaScript Object Notation\uff09\u662f\u4e00\u79cd\u4f7f\u7528\u5e7f\u6cdb\u7684\u8f7b\u91cf\u6570\u636e\u683c\u5f0f\uff0c\u76f8\u5bf9\u4e8eXML\u800c\u8a00\u66f4\u7b80\u5355\uff0c\u4e5f\u6613\u4e8e\u9605\u8bfb\u548c\u7f16\u5199\uff0c\u673a\u5668\u4e5f\u65b9\u4fbf\u89e3\u6790\u548c\u751f\u6210\uff0cJson\u662fJavaScript\u4e2d\u7684\u4e00\u4e2a\u5b50\u96c6\u3002<\/p>\n

Json \u6a21\u5757\u63d0\u4f9b\u4e86\u56db\u4e2a\u65b9\u6cd5\uff1a dumps\u3001dump\u3001loads\u3001load\u3002<\/p>\n

Python\u7684Json\u6a21\u5757\u5e8f\u5217\u5316\u4e0e\u53cd\u5e8f\u5217\u5316\u7684\u8fc7\u7a0b\u5206\u522b\u662f encoding\u548c decoding
encoding\uff1a\u628a\u4e00\u4e2aPython\u5bf9\u8c61\u7f16\u7801\u8f6c\u6362\u6210Json\u5b57\u7b26\u4e32
decoding\uff1a\u628aJson\u683c\u5f0f\u5b57\u7b26\u4e32\u89e3\u7801\u8f6c\u6362\u6210Python\u5bf9\u8c61<\/p>\n

\u5bf9\u4e8e\u7b80\u5355\u6570\u636e\u7c7b\u578b\uff08string\u3001unicode\u3001int\u3001float\u3001list\u3001tuple\u3001dict\uff09\uff0c\u53ef\u4ee5\u76f4\u63a5\u5904\u7406\u3002<\/p>\n

<\/a>JSON \u5e8f\u5217\u5316<\/h3>\n

JSON \u5e8f\u5217\u5316\uff0c\u662f\u628a\u4e00\u4e2aPython\u5bf9\u8c61\u7f16\u7801\u8f6c\u6362\u6210Json\u5b57\u7b26\u4e32\u3002
\u5177\u4f53\u7684\u64cd\u4f5c\u4e3a\uff1ajson.dumps()<\/code><\/p>\n

\n\n\n
\n
1<\/span>
2<\/span>
3<\/span>
4<\/span>
5<\/span>
6<\/span>
7<\/span>
8<\/span>
9<\/span>
10<\/span>
11<\/span>
12<\/span>
13<\/span>
<\/pre>\n<\/td>\n
\n
import json<\/span>
Json_str = [<\/span>
        {"name":"Tom", "aga":20},<\/span>
        {"name":"Jack", "aga":16}<\/span>
    ]<\/span>
student =json.dumps(Json_str)<\/span>
<\/span>
print(type(student))<\/span>
#<class 'str'><\/span>
\u4e0a\u8ff0list\u5df2\u7ecf\u5e8f\u5217\u5316\u4e3aJSON\u5b57\u7b26\u4e32<\/span>
<\/span>
print(student)<\/span>
#[{"name": "Tom", "aga": 20}, {"name": "Jack", "aga": 16}]<\/span>
<\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n
<\/a>JSON \u53cd\u5e8f\u5217\u5316<\/h3>\n
JSON \u53cd\u5e8f\u5217\u5316\uff0c\u662f\u628aJson\u683c\u5f0f\u5b57\u7b26\u4e32\u89e3\u7801\u8f6c\u6362\u6210Python\u7c7b\u578b\u3002
\u5177\u4f53\u7684\u64cd\u4f5c\u4e3a\uff1ajson.loads()<\/code><\/p>\n
python\u4e2d\u5c06json\u53cd\u5e8f\u5217\u5316list\uff1a<\/p>\n
\n\n\n
\n
1<\/span>
2<\/span>
3<\/span>
4<\/span>
5<\/span>
6<\/span>
7<\/span>
8<\/span>
<\/pre>\n<\/td>\n
\n
import json<\/span>
Json_str = '[{"name":"Tom", "aga":20},{"name":"Jack", "aga":16}]'<\/span>
student = json.loads(Json_str)<\/span>
<\/span>
print(type(student))<\/span>
#<class 'list'><\/span>
print(student)<\/span>
#[{'aga': 20, 'name': 'Tom'}, {'aga': 16, 'name': 'Jack'}]<\/span>
<\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n
python\u4e2d\u5c06json\u53cd\u5e8f\u5217\u5316dict\u5b57\u5178\uff1a<\/p>\n
\n\n\n
\n
1<\/span>
2<\/span>
3<\/span>
4<\/span>
5<\/span>
6<\/span>
7<\/span>
8<\/span>
9<\/span>
10<\/span>
11<\/span>
12<\/span>
13<\/span>
<\/pre>\n<\/td>\n
\n
import json<\/span>
Json_str = '{"name":"Tom", "aga":20, "sex":"female"}'<\/span>
\u6ce8\u610f\u4e0a\u8ff0\u5b57\u7b26\u4e32\u8981\u52a0\u5f15\u53f7\uff1a\u53cc\u5f15\u53f7\uff0c\u6570\u5b57\u4e0d\u7528\u52a0\uff0c\u5e03\u5c14\u503c\u4e0d\u7528\u52a0<\/span>
\u6574\u4e2a\u5b57\u7b26\u4e32\u53ef\u4ee5\u7528\u5355\u5f15\u53f7\u5305\u88c5\uff1b<\/span>
<\/span>
student = json.loads(Json_str)<\/span>
print(type(student))<\/span>
#\u8f93\u51fa <class 'dict'><\/span>
print(student)<\/span>
#\u8f93\u51fa {'name': 'Tom', 'sex': 'female', 'aga': 20}<\/span>
<\/span>
\u8bbf\u95eeJSON\u7684\u6210\u5458<\/span>
print(student['name'])<\/span>
<\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n
<\/a>\u6570\u636e\u7c7b\u578b\u8f6c\u6362<\/h3>\n
\u5728\u9ed8\u8ba4\u5b9e\u73b0\u4e2d, json.dumps\u53ef\u4ee5\u5904\u7406\u7684Python\u5bf9\u8c61, \u53ca\u5176\u6240\u6709\u7684\u5c5e\u6027\u503c, \u7c7b\u578b\u5fc5\u987b\u4e3adict, list, tuple, str, float\u6216\u8005int\u3002<\/p>\n
\u9ed8\u8ba4\u5b9e\u73b0\u4e2d, JSON\u548cPython\u4e4b\u95f4\u7684\u6570\u636e\u8f6c\u6362\u5bf9\u5e94\u5173\u7cfb\u5982\u4e0b\u8868:<\/p>\n\n\n\n\n\n\n\n\n\n\n
JSON<\/th>\nPython<\/th>\n<\/tr>\n<\/thead>\n
object<\/td>\ndict<\/td>\n<\/tr>\n
array<\/td>\nlist<\/td>\n<\/tr>\n
string<\/td>\nstr<\/td>\n<\/tr>\n
number<\/td>\nint\/float<\/td>\n<\/tr>\n
true\/false<\/td>\nTrue\/False<\/td>\n<\/tr>\n
null<\/td>\nNone<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"
\u5728\u65e5\u5e38\u5f00\u53d1\u4e2d\uff0c\u5bf9\u6570\u636e\u8fdb\u884c\u5e8f\u5217\u5316\u548c\u53cd…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/131856"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=131856"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/131856\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=131856"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=131856"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=131856"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}