input: def command_line_customer_search(customer_name: str) -> None:
      """
      This function is meant to be part of a command-line application that allows
      users to query customer data by customer name. It should print the results
      of the search.
  
      >>> command_line_customer_search('Alice')
      Alice: Phone number 123-456-7890, Address: 123 Elm St, City: Springfield
      >>> command_line_customer_search('Bob')
      Bob: Phone number 987-654-3210, Address: 456 Oak St, City: Shelbyville
      """
      ...
output:     customers = {
          'Alice': {'phone': '123-456-7890', 'address': '123 Elm St', 'city': 'Springfield'},
          'Bob': {'phone': '987-654-3210', 'address': '456 Oak St', 'city': 'Shelbyville'}
      }
      
      if customer_name in customers:
          customer_info = customers[customer_name]
          print(f"{customer_name}: Phone number {customer_info['phone']}, Address: {customer_info['address']}, City: {customer_info['city']}")
      else:
          print(f"No customer found with name: {customer_name}")