ingresar usando input nombre del cliente, codigo del cliente, direcion, telefono, gmail , guardar y leer los datos en un archivo txt usando os y ast

import os
import ast

def create_file(filename):
  if os.path.exists(filename):
    return False
  else:
    return True

def save_client(client):
  with open(filename, 'a') as file:
    file.write(client)

def get_file_lines(filename):
  return len(open(filename).readlines())

def read_file(filename):
  with open(filename, 'r') as file:
    for line in file:
      print(line)

def read_file_json(filename):
  with open(filename, 'r') as file:
    for line in file:
      print(ast.literal_eval(line))

def update_file(filename):
  with open(filename, 'a') as file:
    file.write(client)

def delete_file(filename):
  if os.path.exists(filename):
    os.remove(filename)
    return True
  else:
    return False

def write_client(filename