I was having a difficult time fixing the display of a legend in one matplotlib figure, and then I noticed that maybe there is an incongruence in matplotlib documentation, or I am not searching in the right place. In my code, I can only make a horizontal legend work if I define ncol, as in the following example from

For me it seems as ncol parameter will be deprecated in the future and ncols will be the only one used.

Notice that the parameter names change within versions of the packages. if you check older versions of matplotlib 3.2.0 ncol was the parameter defined.