I have a CSV file with two columns: one for the names of proteins and another for the concentrations of these proteins. Some proteins share the same concentrations. I would like to create a Circos plot using R or Python to visualize the connections between proteins that share the same concentration.
P.S.: I have attempted several codes, but I keep encountering errors.
As suggested in my comment, I think you are overcomplicating this.
If you need this visualization as stated and your data are as you say, try a network instead:
this makes a plot, which is somewhat ugly but can be readily prettied up using igraph plotting stuff:
You can do something very similar in python. I haven't run this, but it should more or less work: