input: Write a function to create a command-line application in Python that stores customer data and allows customers to query by customer name. The function should take customer name as an input and print the results based on the customer data stored. If the input arguments are invalid, the function should print an error message.
  import sys
  
  def print_customer_data(name):
      # 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.")
  
  assert print_customer_data("John")==None
  assert print_customer_data("Alice")==None
  assert print_customer_data("Bob")==None
  assert print_customer_data("Eve")==None
  assert print_customer_data("")==None
output: def print_customer_data(name):
      customers = {
          "John": "John Doe, 123 Main St, Anytown, USA",
          "Alice": "Alice Smith, 456 Elm St, Othertown, USA",
          "Bob": "Bob Johnson, 789 Oak St, Somewhere, USA",
          "Eve": "Eve Brown, 101 Pine St, Elsewhere, USA"
      }
      
      if name in customers:
          print(customers[name])
      else:
          print("Customer not found.")