JSON module, pickle module (serialized) Shelve module

JSON module:

JSON: Information exchange (conversion of strings) to any language

After JSON conversion, all types can be converted to double quotation marks before being converted to STR

For example: file reads and writes:

1 #Write file:2 ImportJSON3f = open ("Demo.txt","W")4DIC = {"name":"g_l"}5Dic_str =json.dumps (DIC)6 f.write (DIC_STR)7 Print(Type (DIC_STR))8 Print(DIC_STR)

  
 1  #   Read file:  2  import   JSON  3  f = open ( "  Demo.txt   ", "   R   " )   4  f_read = F.read ()  5  f_read = Json.loads (f_read)  6  print   (type (f_read))  7  print  (Type (f_read)) 
 
 

Load and dump for file operations only: "DiC f reference above two code"

Json.dump (DIC,F)

Json.load (f)

Packle Modules: (Support functions, classes, etc.)

Serialization: The process of turning a variable (object) from memory into a storage or transfer is called serialization

1 ImportPickle2DIC = {"name":"Alex","name":"g_l"," Age": 18}3 #Print (Type (DIC))4j =pickle.dumps (DIC)5 Print(Type (j))#byte type6 Print(j)7f = open ("Serialized Object _pickle",'WB')8Pickle.dump (DIC,F)#f.write () #不可读文件9 f.close ()Ten ##---deserialization: One ImportPickle Af = open ("Serialized Object _pickle",'RB') -Date = Pickle.loads (F.read ())#---->date = Pickle.load (f) - Print(Type (date[" Age"])) the Print(date[" Age"])

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Shelve module:

Compared to the Pickle module, it is simpler and has only one open function;

Returns an object similar to a dictionary;

Readable and writable;

Key must be a string;

Value is all the types that Python can support

JSON module, pickle module (serialized) Shelve module