Remove automatic gap between gridded python Tkinter widgets

Question

I\'m using python2 on Windows. When I run the followig code, I get a gap between the two canvas (see picture below), although there is no padding specified when I grid them. Is

Answer 1

You need to set highlightthickness to zero as well.

self.c1 = tk.Canvas(..., highlightthickness=0)

From the canvas page of effbot highlightthickness explained as:

The width of the highlight border. The default is system specific (usually one or two pixels). (highlightThickness/HighlightThickness)