input: Write a function named `print_customer_data` that takes a customer name as input and prints the corresponding customer data. The function should search for the given customer name and return the related information. If no customer data is found, it should print a suitable message. Implement the main function to accept command-line arguments for customer name queries. If the number of arguments is correct, call the `print_customer_data` function; otherwise, print an error message indicating invalid arguments.
  
  
  assert print_customer_data("Alice")==None
  # Expected output: Customer data for Alice
  
  assert print_customer_data("Bob")==None
  # Expected output: Customer data for Bob
  
  assert print_customer_data("UnknownCustomer")==None
  # Expected output: No customer data found for UnknownCustomer
  
  
output: def print_customer_data(customer_name):
      customer_data = {
          "Alice": "Customer data for Alice",
          "Bob": "Customer data for Bob"
      }
      if customer_name in customer_data:
          print(customer_data[customer_name])
      else:
          print(f"No customer data found for {customer_name}")