PyDataExplorer is a file browser with additional functionality to allow realtime data previews in the form of matplotlib plots and spreadsheet-style grid views.  It is build to allow modular use of each of the components in your own code - as an example, a custom "open file" dialog is presented, which uses the file browser GUI to allow the user to select a file to open, and that file is previewed in plot and data preview forms right on the open dialog.