What is the process used to convert an object to a stream of bytes that can be saved in a file pickling writing dumping streaming?
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Introduction to Python PicklePython provides pickle modules for Serialization and de-Serialization of python objects like lists, dictionaries, tuples, etc. Pickling is also called marshaling or flattening in other languages. Pickling is used to store python objects.
Syntax: Below are the steps for pickling in python:
Examples of Python PickleThe examples of the following are given below: Example #1Program to illustrate pickling of python list Code: # Program for pickling python lists # importing module print('<-------------------Pickling----------------------->') import pickle # number of input data to take n = int(input("Enter the number of items")) data = [] # input list # adding items to the list for d in range(n): item = input("Enter data :" + str(d+1)+': ') data.append((item)) # open a file where data need to be stored file = open('list.pkl', 'wb') # dump information to the file pickle.dump(data, file) # close the file file.close() print('\n') print('<-------------------Un-Pickling----------------------->') # open the file where data is dumped fileo = open('list.pkl', 'rb') # loading data datao = pickle.load(fileo) # close the file fileo.close() # showing pickled data print("showing data pickled") for i in datao: print(i)Output: ExplanationThe explanation for the above code: Pickling
Un-Pickling
Example #2Program to illustrate pickling of python dictionaries Code: # Python program for serialization and de-serialization of dictionary # importing module import pickle # creating python object --> dictionary dictionary = {1: 'monday', 2: 'tuesday', 3: 'wednesday', 4: 'thursday', 5: 'friday', 6: 'saturday', 7: 'sunday'} print('<--------------Pickling----------------->') # open a file where to store dictionary print("dictionary to be stored:") print(dictionary) file = open('dictionary.pkl', 'wb') pickle.dump(dictionary, file) # storing dictionary into file # closing file file.close() print('\n') print('<---------------Un-pickling-------------->') fileo = open('dictionary.pkl', 'rb') dicto = pickle.load(fileo) fileo.close() print("displaying dictionary data") for key, item in dicto.items(): print(key, '-->', item)Output: ExplanationThe explanation for the above code:
Example #3Program to illustrate the pickling of python functions Code: # Python program for serialization and de-serialization of function # importing module import pickle # creating python object --> function() # pickling def add(a, b): return (a+b) # opening file to store the add() file = open('function.pkl', 'wb') pickle.dump(add, file) # closing file file.close() # unpickling fileo = open('function.pkl', 'rb') addition = pickle.load(fileo) fileo.close() # calling function x = int(input("enter first number")) y = int(input("enter second number")) print("sum of numbers entered is :", addition(x, y))Output: ExplanationThe explanation for the above code:
Advantages and Disadvantages with usages of Pickling
ConclusionPython pickle module is a great way of storing python objects like tuple, dictionaries, lists, and even python classes and functions can be serialized and de-serialized. But it may not support cross-language, multiple python versions compatibility. Also, unpickling from unknown sources should be avoided as they may contain malicious, erroneous data. Recommended ArticlesThis is a guide to Python Pickle. Here we discuss the introduction to Python Pickle along with the examples and the advantages & disadvantages. You can also go through our other related articles to learn more –
What is the process used to convert an object to a stream of bytes that can be saved in a file Python?“Pickling” is the process whereby a Python object hierarchy is converted into a byte stream, and “unpickling” is the inverse operation, whereby a byte stream (from a binary file or bytes-like object) is converted back into an object hierarchy.
What is the process used to convert an object to a stream of bytes that can be saved in a file group of answer choices?What is object serialization? The process of converting the object to a stream of bytes that can be saved to a file for later retrieval.
Which of the following method is used for pickling?Explanation: Pickling is the process of sterilizing a Python object, that is, conversion of a byte stream into Python object hierarchy. The reverse of this process is known as unpickling.
What is pickle dump in Python?Python Pickle dump
dump() function to store the object data to the file. pickle. dump() function takes 3 arguments. The first argument is the object that you want to store. The second argument is the file object you get by opening the desired file in write-binary (wb) mode.
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