Python Programming Concepts: Exception Handling, File Handling, and Serialization

import os
import json

def handle_exceptions():
    try:
        f = open('file.txt')
        lines = f.readlines()
        for line in lines:
            result = eval(line)
            print(result)
    except FileNotFoundError:
        print("File not found!")
    except ZeroDivisionError:
        print("Zero division error!")
    except NameError:
        print("Name error!")

def handle_files():
    # Check if the file exists before opening it
    if os.path.exists('file.txt'):
        with open('file.txt', 'r') as file:
            content = file.read()
            print(content)
    else:
        print("File does not exist!")

## Create a directory and write some test data to a file
if not os.path.exists('testdir'):
    os.mkdir('testdir')
with open('testdir/test.txt', 'w') as file:
    file.write('Hello, world!')

def serialize_objects():
    # Serialize a simple Python dictionary using pickle
    import pickle
    data = {'key': 'value'}
    with open('serialized.pickle', 'wb') as output_file:
        pickle.dump(data, output_file)
        
    # Deserialize the saved pickle file
    with open('serialized.pickle', 'rb') as input_file:
        loaded_data = pickle.load(input_file)
        print(loaded_data['key'])
    
    # Serialize a complex Python object using JSON
    import json
    import json
    class MyClass:
        def __init__(self, arg1, arg2):
            self.arg1 = arg1
            self.arg2 = arg2
    my_instance = MyClass(42, 'hello')
    serialized_json = json.dumps(my_instance.__dict__)
    print(serialized_json)
    
    # Deserialize the saved JSON string
    deserialized_obj = json.loads(serialized_json)
    print(deserialized_obj)

This code demonstrates various aspects of Python programming, covering exception handling, file handling, object serialization with pickling, and JSON serialization. It includes functions for handling exceptions, checking file existence, creating directories, and writing/reading contents. Additionally, there are examples of serializing and deserializing objects using pickle and JSON formats.

Explore Python programming concepts like exception handling, file handling, pickling, and JSON serialization with this code snippet. Learn about handling exceptions, checking file existence, creating directories, reading/writing file contents, and serializing/deserializing objects.