Table add_highlighted_cell fails if one cell is empty

[JasonMendoza2008]

This works (from the documentation):

from manim import *

class TableExamples(Scene):
    def construct(self):
        t0 = Table(
            [["This", "is a"],
            ["simple", "Table in \n Manim."]]
        )
        t0.add_highlighted_cell((2,2), color=YELLOW)
        self.add(t0)

But this doesn't

from manim import *

class TableExamples(Scene):
    def construct(self):
        t0 = Table(
            [["", "is a"],
            ["simple", "Table in \n Manim."]]
        )
        t0.add_highlighted_cell((2,2), color=YELLOW)
        self.add(t0)

It raises the error:
IndexError: list index out of range

Python 3.11.1. manim 0.17.3.

[uwezi]

Interesting, especially since the function .get_highlighted_cell() which is used by .add_highlighted_cell() does still work, even with empty cells:

class TableExamples(Scene):
    def construct(self):
        t0 = Table(
            [["", "is a"],
            ["simple", "Table in \n Manim."]]
        )
        a = t0.get_highlighted_cell((2,2), color=YELLOW)
        self.add(t0, a)

[uwezi]

The problem lies in the method .get_entries()

[AR4152]

I'm happy to help with this! Could I please be assigned to work on this issue?

[Miffyyy-huahua]

Hi, I'm interested in this issue. My thought is an edge case should be implemented on .get_entries() so when .get_highlighted_cell calls this method there won't be error. Can I be assigned to this issue? thanks!

[Miffyyy-huahua]

If you input
class TableExamples(Scene):
def construct(self):
t0 = Table(
[["", "is a"],
["simple", "Table in \n Manim."]]
)
t0.add_highlighted_cell((0,0), color=YELLOW)
self.add(t0)
you can get the result you want

[JasonMendoza2008]

If you input class TableExamples(Scene): def construct(self): t0 = Table( [["", "is a"], ["simple", "Table in \n Manim."]] ) t0.add_highlighted_cell((0,0), color=YELLOW) self.add(t0) you can get the result you want

I'd argue that's unintuitive and shouldn't be considered a feature, but good point.

[AR4152]

I believe I've found the root cause of the issue and the solution. I'm currently creating robust test cases for add_highlighted_cell function and will update the details here in sometime.

Briefly speaking, I think the issue is caused by trying to handle the case when the program assumes row/column labels are added and the top left cell (top_left_entry) is not named.