5 Practical Python Programs Using the Pickle Library

 

1. Saving and Loading a List

This program saves a list to a file and then loads it back.

import pickle

my_list = ['apple', 'banana', 'cherry']

with open('list.pkl', 'wb') as file:

    pickle.dump(my_list, file)

with open('list.pkl', 'rb') as file:

    loaded_list = pickle.load(file)

print("Loaded List:", loaded_list)

#source code --> clcoding.com

Loaded List: ['apple', 'banana', 'cherry']

2. Saving and Loading a Dictionary

This program demonstrates saving a dictionary to a file and loading it back.

import pickle

my_dict = {'name': 'John', 'age': 30, 'city': 'New York'}

with open('dict.pkl', 'wb') as file:

    pickle.dump(my_dict, file)

with open('dict.pkl', 'rb') as file:

    loaded_dict = pickle.load(file)

print("Loaded Dictionary:", loaded_dict)

#source code --> clcoding.com

Loaded Dictionary: {'name': 'John', 'age': 30, 'city': 'New York'}

3. Saving and Loading a Custom Object

This program saves an instance of a custom class to a file and loads it back.

import pickle

class Person:

    def __init__(self, name, age):

        self.name = name

        self.age = age

    def __repr__(self):

        return f"Person(name={self.name}, age={self.age})"

person = Person('Alice', 25)

with open('person.pkl', 'wb') as file:

    pickle.dump(person, file)

with open('person.pkl', 'rb') as file:

    loaded_person = pickle.load(file)

print("Loaded Person:", loaded_person)

#source code --> clcoding.com

Loaded Person: Person(name=Alice, age=25)

4. Saving and Loading a Tuple

This program saves a tuple to a file and loads it back.

import pickle

my_tuple = (10, 20, 30, 'Hello')

with open('tuple.pkl', 'wb') as file:

    pickle.dump(my_tuple, file)

with open('tuple.pkl', 'rb') as file:

    loaded_tuple = pickle.load(file)

print("Loaded Tuple:", loaded_tuple)

#source code --> clcoding.com

Loaded Tuple: (10, 20, 30, 'Hello')

5. Saving and Loading Multiple Objects

This program saves multiple objects to a single file and loads them back.

import pickle

list_data = [1, 2, 3]

dict_data = {'a': 1, 'b': 2}

string_data = "Hello, World!"

with open('multiple.pkl', 'wb') as file:

    pickle.dump(list_data, file)

    pickle.dump(dict_data, file)

    pickle.dump(string_data, file)

with open('multiple.pkl', 'rb') as file:

    loaded_list = pickle.load(file)

    loaded_dict = pickle.load(file)

    loaded_string = pickle.load(file)

print("Loaded List:", loaded_list)

print("Loaded Dictionary:", loaded_dict)

print("Loaded String:", loaded_string)

#source code --> clcoding.com

Loaded List: [1, 2, 3]

Loaded Dictionary: {'a': 1, 'b': 2}

Loaded String: Hello, World!