Python JSON and Pickle modules

Serialization modules: JSON and Pickle

Two modules for serialization

• JSON, used to convert between string and Python data types
• Pickle for conversion between Python-specific types and Python data types

The JSON module provides four functions: dumps, dump, loads, load

The Pickle module provides four functions: dumps, dump, loads, load

Import jsons = ' {' Key1 ': ' value1 ', ' key2 ': ' value2 '} '     # ==> Convert a string to another data type with a JSON module, the quotation marks in the string must be in double quotes ret = Json.loads (s)                         # ==> loads by string to other data types print (Ret,type (ret)) L = ' [11,22,3,56,75] ' result =json.loads (l) Print ( Result,type (Result) # input result: {' key1 ': ' value1 ', ' key2 ': ' value2 '} <class ' Dict ' >[11, 3, +/--] <class ' list ' &G T

Import Jsonret = Json.load (' ethan.txt ', ' R ')  # ==> Convert the document (internally a string format) to another Python data type print (Ret,type (ret))                    # ==> document is a dictionary-style string # input result: {' key1 ': ' value1 ', ' key2 ': ' value2 '} <class ' Dict ' ># Summary: # json.loads () is used to resemble dictionaries, lists, Tuple's string, converted to a dictionary, list, tuple # json.load () to convert a document (a string that resembles a dictionary, a list, a tuple) to a dictionary, list, tuple

Import Jsondi = {"Key1": "Value1", "Key2": "value2"}ret = Json.dumps (di)                    # ==> Convert dictionaries, lists, tuples to string format print (Ret,type ( RET) # Input result: {"Key1": "Value1", "Key2": "value2"} <class ' str ' >json.dump (di,open (' test2.txt ', ' A + '))    # ==> Convert dictionaries, tuples, lists to string format and write to document # Input results: Test2 file Contents {"Key1": "Value1", "Key2": "Value2"}# Summary: # json.dumps ()  used to convert dictionaries, lists, tuples, to strings # json.dump ()   for converting dictionaries, lists, tuples into documents and convert them to strings

Import pickled = {' name ': ' Ethan ', ' age ': 28}ret = pickle.dumps (d)                       # ==> Pickle convert dictionaries, tuples, lists to binary print (RET, type (ret) ) L = [One, one, 3, two, 54]res = Pickle.dumps (l) print (res) pickle.dump (d, open (' test2.txt ', ' ab '))     # ==> Convert dictionaries, tuples, lists to binary Write to document # Note that dump load does not run together, will error, step by step f = open (' test2.txt ', ' RB ') R = pickle.loads (F.read ())                  # ==> convert binary to Dictionary, list, tuple # R = Pickle.load (f) Print (r) # input result: B ' \x80\x03}q\x00 (x\x04\x00\x00\x00nameq\x01x\x05\x00\x00\x00ethanq\x02x\x03\x00\ X00\x00ageq\x03k\x1cu. ' <class ' bytes ' >b ' \x80\x03]q\x00 (k\x0bk\x16k\x03k-k6e. ') {' name ': ' Ethan ', ' age ': 28}# Summary: # pickle.dumps ()  used to convert dictionaries, lists, tuples, and Binary # pickle.dump () to   a dictionary, list, tuple, into a document and converted to binary # pickle.loads ()  is used to convert binary, to dictionary, list, tuple # pickle.load ()   to convert document binaries to dictionaries, lists, tuples

Python JSON and Pickle modules