input: def print_customer_data(name):
      """Command-line function that searches customer data by customer name and prints the results.
      If the customer is found, it prints the customer's details.
      If the customer is not found, it prints a message indicating that the customer was not found.
      >>> print_customer_data("John Doe")
      Customer ID: 1, First Name: John, Last Name: Doe, Email: john.doe@example.com, Phone: 123-456-7890
      >>> print_customer_data("Jane Smith")
      Customer not found
      """
      # Code for searching customer data by customer name and printing results
      ...
  
  # Main function for the customer search application
  if __name__ == "__main__":
      # Get command line arguments
      args = sys.argv
      
      if len(args) == 2:
          name = args[1]
          print_customer_data(name)
      else:
          print("Invalid arguments, please specify a customer name.")
output:     customer_data = {
          "John Doe": {
              "Customer ID": 1,
              "First Name": "John",
              "Last Name": "Doe",
              "Email": "john.doe@example.com",
              "Phone": "123-456-7890"
          }
      }
      
      if name in customer_data:
          customer = customer_data[name]
          print(f"Customer ID: {customer['Customer ID']}, First Name: {customer['First Name']}, Last Name: {customer['Last Name']}, Email: {customer['Email']}, Phone: {customer['Phone']}")
      else:
          print("Customer not found")