Binary package “perl-tk” in ubuntu bionic
Perl module providing the Tk graphics library
Perl/Tk (also known as pTk or ptk) is a collection of modules and
code that attempts to wed the easily configured Tk widget toolkit
to the powerful lexigraphic, dynamic memory, I/O, and object-oriented
capabilities of Perl 5. In other words, it is an interpreted
scripting language for making widgets and programs with Graphical
User Interfaces (GUI).
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A good place to get started is by running the "widget" demo that's
installed with this package.