Question about 3D plot

Dear all,
I am a newbie of plotly and Python.
Recently, I tried to re-plot the 3D surface as shown in

with a 24* 24 matrix included in the .csv file.
My question is, how can I plot the n*m data for my own data?

Thanks for your time.


Thanks for using Plotly!
Here is a minimal demo for 3x2.