2.3 使用 json.tool 来格式化 JSON
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.. image:: http://image.iswbm.com/20200804124133.png

假设现在你需要查看你机器上的json文件，而这个文件没有经过任何的美化，阅读起来是非常困难的。

.. code:: shell

   $ cat demo.json
   {"_id":"5f12d319624e57e27d1291fe","index":0,"guid":"4e482708-c6aa-4ef9-a45e-d5ce2c72c68d","isActive":false,"balance":"$2,954.93","picture":"http://placehold.it/32x32","age":36,"eyeColor":"green","name":"MasseySaunders","gender":"male","company":"TALAE","email":"masseysaunders@talae.com","phone":"+1(853)508-3237","address":"246IndianaPlace,Glenbrook,Iowa,3896","about":"Velitmagnanostrudexcepteurduisextemporirurefugiataliquasunt.Excepteurvelitquiseuinexinoccaecatoccaecatveliteuet.Commodonisialiquipirureminimconsequatminimconsecteturipsumsitex.\r\n","registered":"2017-02-06T06:42:20-08:00","latitude":-10.269827,"longitude":-103.12419,"tags":["laborum","excepteur","veniam","reprehenderit","voluptate","laborum","in"],"friends":[{"id":0,"name":"DorotheaShields"},{"id":1,"name":"AnnaRosales"},{"id":2,"name":"GravesBryant"}],"greeting":"Hello,MasseySaunders!Youhave8unreadmessages.","favoriteFruit":"apple"}

这时候你就可以使用 python 的命令行来直接美化。

.. code:: shell

   $ python -m json.tool demo.json
   {
       "_id": "5f12d319624e57e27d1291fe",
       "about": "Velitmagnanostrudexcepteurduisextemporirurefugiataliquasunt.Excepteurvelitquiseuinexinoccaecatoccaecatveliteuet.Commodonisialiquipirureminimconsequatminimconsecteturipsumsitex.\r\n",
       "address": "246IndianaPlace,Glenbrook,Iowa,3896",
       "age": 36,
       "balance": "$2,954.93",
       "company": "TALAE",
       "email": "masseysaunders@talae.com",
       "eyeColor": "green",
       "favoriteFruit": "apple",
       "friends": [
           {
               "id": 0,
               "name": "DorotheaShields"
           },
           {
               "id": 1,
               "name": "AnnaRosales"
           },
           {
               "id": 2,
               "name": "GravesBryant"
           }
       ],
       "gender": "male",
       "greeting": "Hello,MasseySaunders!Youhave8unreadmessages.",
       "guid": "4e482708-c6aa-4ef9-a45e-d5ce2c72c68d",
       "index": 0,
       "isActive": false,
       "latitude": -10.269827,
       "longitude": -103.12419,
       "name": "MasseySaunders",
       "phone": "+1(853)508-3237",
       "picture": "http://placehold.it/32x32",
       "registered": "2017-02-06T06:42:20-08:00",
       "tags": [
           "laborum",
           "excepteur",
           "veniam",
           "reprehenderit",
           "voluptate",
           "laborum",
           "in"
       ]
   }