input: def command_line_customer_search():
      """
      Implement a command-line application in Python that stores customer data and 
      allows users to query it by customer name. The application should take a customer 
      name as a command-line argument and print the corresponding customer data. If the 
      correct number of arguments is not provided, it should print an error message.
  
      >>> command_line_customer_search(['program.py', 'John'])
      Customer Data for John: [data related to John]
      >>> command_line_customer_search(['program.py'])
      Invalid arguments, please specify a customer name.
      """
      import sys 
      
      def print_customer_data(name): 
          # Code for searching customer data by customer name and 
          # printing results 
          print(f"Customer Data for {name}: [data related to {name}]")
  
      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:     import sys 
      
      def print_customer_data(name): 
          # Code for searching customer data by customer name and 
          # printing results 
          print(f"Customer Data for {name}: [data related to {name}]")
  
      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.")