Jerzy, On Mon, Sep 28, 2015 at 4:25 PM, Jerzy Karczmarczuk < jerzy.karczmarc...@unicaen.fr> wrote:
> > Le 28/09/2015 21:03, Benjamin Root a écrit : > >> Where does he multiply a list by a float? The traceback shows the >> multiplication happening much further down in the draw stack. >> > > Look, Benjamin Root, I don't know, and I will not "investigate" where this > operation happens. I did not ask you to investigate anything for me. You made the assertion that the user was multiplying a list by a float, therefore, I assumed that you were seeing something that I had not seen. > The diagnosis is a standard Python message. Thus, I took the program of > Shakhti Kannan, and in a few seconds I changed > > > x = [1.0, 2.0, 3.0] into x = np.array([1.0, 2.0, 3.0]) > > and in update_line: x.append(1.0) into x=np.concatenate((x,[1.0])) > > And the program began to run without error messages. So, please, these are > FACTS: somewhere the lists x,y,z get down in this draw stack. > > I realize that, and that isn't in dispute. Nowhere did I say that converting the lists into numpy arrays would not solve the problem. > That shouldn't matter. ax.plot() accepts lists as valid inputs and it >> should be converting them into numpy arrays under the hood. >> > > There are two different issues, accepting any sequences/iterators is one, > converting them into arrays - another one. This second operation visibly > doesn't take place. > > Of course the second operation isn't visible. I did say that it happens "under the hood". His program is perfectly valid (albeit not ideal) and demonstrated a bug in matplotlib's codebase. That is why I asked him to file a bug report. My reading of your email is that you are upset for some reason, but I have no clue why. Ben Root
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