File Dialogs

The tkinter.filedialog module can be used to get a filename from the user. The module provides two convenience functions, one to get an existing filename so you can open it, and one to get a new filename, to save things into.

tkinter.filedialog.askopenfilename([options]). If the dialog is cancelled by the user, the function returns None.

tkinter.filedialog.asksaveasfilename([options]).

Figure 9-6. askopenfilename, asksaveasfilename

The following options can be used with the askopenfilename and asksavefilename functions:

Table 9-4. askopenfilename options

Option	Type	Description
`defaultextension`	string	An extension to add to the filename, if not explicitly given by the user. The string should include the leading dot (ignored by the open dialog).
`filetypes`	list	Sequence of (label, pattern) tuples. The same label may occur with several patterns. Use “*” as the pattern to indicate all files.
`initialdir`	string	Initial directory.
`initialfile`	string	Initial file (ignored by the open dialog)
`parent`	widget	Which window to place the message box on top of. When the dialog is closed, the focus is returned to the parent window.
`title`	string	Message box title.