input: 
  from typing import List
  
  def print_customer_data_with_valid_args(args: List[str]) -> None:
      """
      This function processes command-line arguments to print customer data based on a specified customer name.
      If the number of arguments is exactly two, it checks if the second argument is a customer name and prints the associated customer data.
      Otherwise, it informs the user about invalid arguments.
      
      >>> print_customer_data_with_valid_args(['script_name', 'John']) # Assuming 'John' exists in customer data
      John's data printed
      >>> print_customer_data_with_valid_args(['script_name'])
      Invalid arguments, please specify a customer name.
      >>> print_customer_data_with_valid_args(['script_name', 'John', 'extra_arg'])
      Invalid arguments, please specify a customer name.
      """
      if len(args) == 2:
          name = args[1]
          print(f"{name}'s data printed")  # Placeholder for actual logic to print customer data
      else:
          print("Invalid arguments, please specify a customer name.")
  
output:     if len(args) == 2:
          name = args[1]
          print(f"{name}'s data printed")  # Placeholder for actual logic to print customer data
      else:
          print("Invalid arguments, please specify a customer name.")