仅在按键事件（Matplotlib和Python）之后在绘图循环中显示下一个绘图

The code below represents the plotting of a graph that corresponds to the reading of a text file with n lines. Each line contains 4 columns,the first three columns are coordinates of (x,y,z) points, and the fourth column is a binary variable not necessary for this plotting.The code below represents the plotting of a gra