binary file handeling using python pickel

bin_file_ops.py

import pickle

def write_binary_file(filename, data):
    with open(filename, 'wb') as file:
        pickle.dump(data, file)
    print(f"Data written to {filename}.")

def read_binary_file(filename):
    try:
        with open(filename, 'rb') as file:
            data = pickle.load(file)
            print(f"Data read from {filename}: {data}")
    except FileNotFoundError:
        print(f"{filename} not found.")
    except Exception as e:
        print(f"Error reading {filename}: {e}")

def search_binary_file(filename, key):
    try:
        with open(filename, 'rb') as file:
            data = pickle.load(file)
            if key in data:
                print(f"Key '{key}' found in {filename}.")
            else:
                print(f"Key '{key}' not found in {filename}.")
    except FileNotFoundError:
        print(f"{filename} not found.")
    except Exception as e:
        print(f"Error searching in {filename}: {e}")

def append_binary_file(filename, new_data):
    try:
        with open(filename, 'ab') as file:
            pickle.dump(new_data, file)
        print(f"Data appended to {filename}.")
    except Exception as e:
        print(f"Error appending to {filename}: {e}")

def update_binary_file(filename, key, new_value):
    try:
        with open(filename, 'rb') as file:
            data = pickle.load(file)
            if key in data:
                data[key] = new_value
                with open(filename, 'wb') as updated_file:
                    pickle.dump(data, updated_file)
                print(f"Key '{key}' updated in {filename}.")
            else:
                print(f"Key '{key}' not found in {filename}.")
    except FileNotFoundError:
        print(f"{filename} not found.")
    except Exception as e:
        print(f"Error updating in {filename}: {e}")

# Example usage:
filename = "example_binary_file.dat"
data_to_write = {"name": "John", "age": 30, "city": "New York"}

# Write to a binary file (create if not exists, overwrite if exists)
write_binary_file(filename, data_to_write)

# Read from the binary file
read_binary_file(filename)

# Search for a key in the binary file
search_binary_file(filename, "age")

# Append new data to the binary file
new_data_to_append = {"occupation": "Engineer", "salary": 80000}
append_binary_file(filename, new_data_to_append)

# Update a value in the binary file
update_binary_file(filename, "age", 31)

# Read the updated file
read_binary_file(filename)