input: Write a function to create a command-line application in Python that stores customer data and allows customers to query by customer name. The function should accept a customer name as input and print the corresponding customer data if found. If no arguments are provided, it should print an error message.
  assert main(["script_name", "John"])
  # Should print John's customer data if it exists
  assert main(["script_name"])
  # Should print "Invalid arguments, please specify a customer name."
output: def main(args):
      if len(args) < 2:
          print("Invalid arguments, please specify a customer name.")
      else:
          customer_name = args[1]
          # Assuming customer data is stored in a dictionary
          customer_data = {"John": "John's customer data"}
          if customer_name in customer_data:
              print(customer_data[customer_name])
          else:
              print(f"No data found for customer: {customer_name}")