input: 
  import sys 
  
  def print_customer_data(name: str): 
      """
      Searches customer data by customer name and prints the results.
      If the customer is not found, it prints 'Customer not found.'
      
      >>> print_customer_data('Alice')
      Name: Alice, Address: 123 Main St, Phone: 123-456-7890
  
      >>> print_customer_data('Bob')
      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 = {
          'Alice': {'address': '123 Main St', 'phone': '123-456-7890'},
          'Charlie': {'address': '456 Elm St', 'phone': '987-654-3210'}
      }
      
      if name in customer_data:
          address = customer_data[name]['address']
          phone = customer_data[name]['phone']
          print(f'Name: {name}, Address: {address}, Phone: {phone}')
      else:
          print('Customer not found.')