Examples of dumps, loads, dump, and load functions in JSON

1.dumps ()

1. Json.dumps ()

To convert data from a dictionary (DIC) type to a string (str), an error occurs directly in writing the data of the Dict type to the JSON file, so the function needs to be used when writing the data.

ImportJSON name= {'AA':'1111','BB':'2222','cc':'3333','DC':'4444'} jsobj=json.dumps (name)Print(name)Print(jsobj)Print(Type (name))Print(Type (jsobj))

After the operation, the results are as follows;

{'AA':'1111','cc':'3333','BB':'2222','DD':'4444'}{"AA":"1111","cc":"3333","BB":"2222","DD":"4444"}<type'Dict'><type'Str'>

An error occurs when the JSON file is written to execute:

ImportJSON name= {'AA':'1111','BB':'2222','cc':'3333','DD':'4444'} emb_filename= ('/home/cqh/facedata/emb_json.json')    #jsobj = json.dumps (NAME_EMB)//When function conversion is not performedwith open (Emb_filename,"W") as F:f.write (name) f.close ()

When the function is not converted, the system error, and when the function is added, the system runs normally.

2.json.loads ()

Json.loads () is used to convert data of type STR to Dict.

ImportJSON Nameb= {'AA':'1111','BB':'2222','cc':'3333','D':'4444'} jsdumps=json.dumps (name) jsloads=json.loads (jsdumps)Print(name)Print(jsdumps)Print(jsloads)Print(Type (name))Print(Type (jsdumps))Print(Type (jsloads))

Operation Result:

{'AA':'1111','cc':'3333','BB':'2222','DD':'4444'}{"AA":"1111","cc":"3333","BB":"2222","DD":"4444"}{u'AA': U'1111', u'cc': U'3333', u'BB': U'2222', u'DD': U'4444'}<type'Dict'><type'Str'><type'Dict'>

3, Json.dump ()

Json.dump () is used to convert data of type dict to STR and write to a JSON file. There are two ways to write data to a JSON file

ImportJSON Name_emb= {'a':'1111','b':'2222','C':'3333','D':'4444'} emb_filename= ('/home/cqh/facedata/emb_json.json')   #Solution 1Jsobj =Json.dumps (NAME_EMB) with open (Emb_filename,"W") as F:f.write (jsobj) f.close ()#Solution 2Json.dump (NAME_EMB, open (Emb_filename,"W"))

4, Json.load ()

Json.load () is used to read data from a JSON file.

1 ImportJSON2  3Emb_filename = ('/home/cqh/facedata/emb_json.json')  4  5Jsobj =json.load (Open (emb_filename))6  7 Print(jsobj)8 Print(Type (jsobj))9  Ten  forKeyinchJsobj.keys (): One     Print('Key:%s Value:%s'% (Key,jsobj.get (key)))

The results of the operation are as follows:

{u'a': U'1111', u'C': U'3333', u'b': U'2222', u'D': U'4444'}<type'Dict'>key:a Value:1111key:c Value:3333key:b Value:2222key:d Value:4444

Examples of dumps, loads, dump, and load functions in JSON