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 use the command-line arguments to search for and print the customer data.
  assert print_customer_data("Alice")==None
  assert print_customer_data("Bob")==None
  assert print_customer_data("Charlie")==None
  assert print_customer_data("Dave")==None
  assert print_customer_data("")=="Invalid arguments, please specify a customer name."
output: def print_customer_data(name):
      customers = {
          "Alice": "Customer: Alice, Age: 30, City: New York",
          "Bob": "Customer: Bob, Age: 25, City: Los Angeles",
          "Charlie": "Customer: Charlie, Age: 35, City: Chicago",
          "Dave": "Customer: Dave, Age: 40, City: Houston"
      }
      if name in customers:
          print(customers[name])
      elif name == "":
          print("Invalid arguments, please specify a customer name.")
      else:
          print("Customer not found.")