main.py

import pathlib as pathlib

def create():
    try:
        file_name=input("Enter the file name: ")
        if pathlib.Path(file_name).exists():
            print("File already exists")
            return
        else:
            content=input("Enter the content to be written in the file: ")
            with open(file_name,"w") as f:
                f.write(content)
    except Exception as e:
        print(f"An error {e} occurred")

def read():
    try:
        file_name=input("Enter the file name: ")
        if not pathlib.Path(file_name).exists():
            print("File does not exist")
            return
        else:
            with open(file_name,"r") as f:
                print(f.read())
    except Exception as e:
        print(f"An error {e} occurred")

def update():
    try:
        print("Enter 1 to append to the file")
        print("Enter 2 to overwrite the file")
        print("Enter 3 to change the file name")
        c=int(input("Enter your choice: "))
        file_name=input("Enter the file name: ")
        if not pathlib.Path(file_name).exists():
            print("File does not exist")
            return
        else:
            if c==1:
                content=input("/n","Enter the content to be appended to the file: ")
                with open(file_name,"a") as f:
                    f.write(content)
            elif c==2:
                content=input("Enter the content to be written in the file: ")
                with open(file_name,"w") as f:
                    f.write(content)
            elif c==3:
                new_file_name=input("Enter the new file name: ")
                pathlib.Path(file_name).rename(new_file_name)
            else:
                print("Invalid choice")
    except Exception as e:
        print(f"An error {e} occurred")

def delete():
    try:
        file_name=input("Enter the file name: ")
        if not pathlib.Path(file_name).exists():
            print("File does not exist")
            return
        else:
            pathlib.Path(file_name).unlink()
    except Exception as e:
        print(f"An error {e} occurred")
try:
    print("Enter 1 to create a file")
    print("Enter 2 to read a file")
    print("Enter 3 to update a file")
    print("Enter 4 to delete a file")

    choice=int(input("Enter your choice: "))

    if choice==1:
        create()    
    elif choice==2:
        read()
    elif choice==3:
        update()
    elif choice==4:
        delete()
    else:
        print("Invalid choice")
except Exception as e:
    print(f"An error {e} occurred")