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 be named `print_customer_data` and should take a customer name as input. The main function should handle command-line arguments and call `print_customer_data` if a customer name is provided. If not, it should print an error message.
  assert print_customer_data("John Doe")==None
  assert print_customer_data("Jane Smith")==None
  assert sys.argv == ["app.py", "John Doe"]
  assert sys.argv == ["app.py", "Jane Smith"]
  assert print_customer_data("InvalidName")==None
output: def print_customer_data(customer_name):
      customers = {
          "John Doe": "Customer ID: 12345, Email: john.doe@example.com",
          "Jane Smith": "Customer ID: 67890, Email: jane.smith@example.com"
      }
      if customer_name in customers:
          print(customers[customer_name])
      else:
          print("Customer not found")