input: Write a function to create a command-line application in Python that stores customer data and allows customer to query by customer name. The function should include a main function that takes command line arguments for customer name search and calls a function named `print_customer_data` to print the search results. If the number of command line arguments is not exactly 2 (the program name and customer name), it should print an error message indicating invalid arguments.
  
  assert print_customer_data("John Doe")==None
  assert print_customer_data("Jane Smith")==None
  assert print_customer_data("Invalid Customer")==None
  assert print_customer_data("")==None
  assert print("Invalid arguments, please specify a customer name.")==None
output: def main():
      import sys
      args = sys.argv
      if len(args) != 2:
          print("Invalid arguments, please specify a customer name.")
      else:
          print_customer_data(args[1])