Displaying the directory dialog

The tk_chooseDirectory command displays a dialog window that allows the end user to select a directory, as the name implies. The return value is the absolute directory path selected or an empty string (if the Cancel button is clicked).

The syntax is as follows:

tk_chooseDirectory option value …

The tk_chooseDirectory command accepts one or more option value pairs as detailed below. If no option value pairs are provided, the command will display the default values for the dialog.

Option	Interpretation
-initialdir directory	Sets the initial directory to display. If not set, the current working directory will be displayed.
-mustexist boolean	Specifies if the user may specify a non-existing directory.
-parent window	Specifies the parent of the dialog. The dialog is displayed on top of the parent.
-title string	Sets the text to be displayed in the dialog title bar.

How to do it…

In the following example, we will display a message box and assign...