Preface
A few years ago, for a certain project, I was looking for a scripting language providing widgets. Finally, there remained two of them to my choice: Python and Tcl/Tk. I was a novice to both of them.
Python appeared easier, but when checking the documentation of Tkinter, I found this hint: for more details, read the Tcl/Tk documentation. So, I threw away Python and took Tcl/Tk.
Now, it's me who provides a Tk interface to another scripting language, and I am willed not to repeat Python's mistake.—In short: if you are a novice to Tk, you can read this manual confidentally.
If there should be an error in this documentation, just ask me. To answer, I will not respond: RTFM, but check out the docs for an error. Promise.
(If you know of Tcl/Tk, it should suffice if you read about the widget hierarchie, nonetheless! And, for safety's sake, the restrictions too, please.)