cmd2 issues a configurable prompt before soliciting user input.
This prompt can be configured by setting the cmd2.Cmd.prompt instance attribute. This contains the string which should be printed as a prompt for user input. See the Pirate example for the simple use case of statically setting the prompt.
When a user types a Multiline Command <features/multiline_commands:Multiline Commands> it may span more than one line of input. The prompt for the first line of input is specified by the cmd2.Cmd.prompt instance attribute. The prompt for subsequent lines of input is defined by the cmd2.Cmd.continuation_prompt attribute.See the Initialization example for a demonstration of customizing the continuation prompt.
If you wish to update the prompt between commands, you can do so using one of the Application Lifecycle Hooks <features/hooks:Hooks> such as a Postcommand hook <features/hooks:Postcommand Hooks>. See PythonScripting for an example of dynamically updating the prompt.
cmd2 provides two functions to provide asynchronous feedback to the user without interfering with the command line. This means the feedback is provided to the user when they are still entering text at the prompt. To use this functionality, the application must be running in a terminal that supports VT100 control characters and readline. Linux, Mac, and Windows 10 and greater all support these.
cmd2.Cmd.async_alert
cmd2.Cmd.async_update_prompt
cmd2 also provides a function to change the title of the terminal window. This feature requires the application be running in a terminal that supports VT100 control characters. Linux, Mac, and Windows 10 and greater all support these.
cmd2.Cmd.set_window_title
The easiest way to understand these functions is to see the AsyncPrinting example for a demonstration.