input: Write a function named `print_customer_data(name)` that searches for customer data by customer name and prints the results. The function should be part of a Python command-line application that allows users to query customer data by passing a customer name as a command-line argument. If the number of arguments is not exactly 2, the application should print an error message indicating that a customer name should be specified.
  
  assert print_customer_data("Alice")==None
  assert print_customer_data("Bob")==None
  assert print_customer_data("Charlie")==None
output: def print_customer_data(name):
      if len(sys.argv) != 2:
          print("Error: A customer name should be specified.")
          return
      print(f"Searching for customer: {name}")