What is Python Pickling ?

Writen by Devil 3:17 AM - 0 Comments

Python pickle module is used for serializing and de-serializing a Python object structure.Any object in Python can be pickled so that it can be saved on disk. 

• It  serializes the object first before writing it to file. 
• It is a way to convert a python object (list, dict, etc.) into a character stream. 
• It helps to reconstruct the object in another python script.

import pickle

  

def storeData():

    # initializing data to be stored in db

    Omkar = {'key' : 'Omega', 'name' : 'Hello Omega',

    'age' : 99, 'pay' : 40000}

    Jagdish = {'key' : 'Alfa', 'name' : 'Hello Alfa',

    'age' : 55, 'pay' : 50000}

  

    # database

    db = {}

    db['Omega'] = Omega

    db['Alfa'] = Alfa

      

    # Its important to use binary mode

    dbfile = open('examplePickle', 'ab')

      

    # source, destination

    pickle.dump(db, dbfile)                     

    dbfile.close()

  

def loadData():

    # for reading also binary mode is important

    dbfile = open('examplePickle', 'rb')     

    db = pickle.load(dbfile)

    for keys in db:

        print(keys, '=>', db[keys])

    dbfile.close()

  

if __name__ == '__main__':

    storeData()

    loadData()

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