input: 
  import sys 
    
  def print_customer_data(name): 
      """Function to search customer data by customer name and print the results.
      Example:
      For print_customer_data('John')
      Output:
      Name: John
      Address: 123 Main St
      Phone: 555-1234
      Email: john@example.com
      """
      # 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': {
              'Address': '123 Main St',
              'Phone': '555-1234',
              'Email': 'john@example.com'
          },
          'Jane': {
              'Address': '456 Elm St',
              'Phone': '555-5678',
              'Email': 'jane@example.com'
          }
      }
      
      if name in customer_data:
          print(f"Name: {name}")
          for key, value in customer_data[name].items():
              print(f"{key}: {value}")
      else:
          print(f"Customer '{name}' not found.")