File operation

import os

def create_file(file_name, content=""):

with open(file_name, 'w') as file:

file.write(content)

print(f"File '{file_name}' created successfully.")

def delete_file(file_name):

if os.path.exists(file_name):

os.remove(file_name)

print(f"File '{file_name}' deleted successfully.")

else:

print(f"File '{file_name}' does not exist.")

def update_file(file_name, content):

if os.path.exists(file_name):

with open(file_name, 'a') as file:

file.write(content)

print(f"File '{file_name}' updated successfully.")

else:

print(f"File '{file_name}' does not exist. Create the file first.")

def invalid_operation(*args):

print("Invalid operation selected.")

# Switch-case-like dictionary

file_operations = {

'create': create_file,

'delete': delete_file,

'update': update_file

}

# Example usage

def file_operation_handler(operation, file_name, content=""):

file_operations.get(operation, invalid_operation)(file_name, content)

# Simulating user input

operation = input("Enter the operation (create, delete, update): ").strip().lower()

file_name = input("Enter the file name: ").strip()

if operation in ['create', 'update']:

content = input("Enter the content: ")

file_operation_handler(operation, file_name, content)a

else:

file_operatin_handler(operation, file_name)

```

Kalaimani