input: from typing import List
  
  def print_customer_data(name: str) -> None:
      """
      Search for customer data by customer name and print the results.
      If the customer name is not found, print a message indicating the search failure.
      
      >>> print_customer_data("John Doe")
      Customer found: John Doe, Age: 30, Address: 123 Main St
      >>> print_customer_data("Jane Smith")
      Customer not found
      """
  
      # Placeholder for actual implementation of searching and printing customer data
      pass
  
  if __name__=="__main__": 
      import sys
      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": {"Age": 30, "Address": "123 Main St"},
          "Jane Smith": None
      }
  
      if name in customer_data:
          if customer_data[name]:
              print(f"Customer found: {name}, Age: {customer_data[name]['Age']}, Address: {customer_data[name]['Address']}")
          else:
              print("Customer not found")
      else:
          print("Customer not found")