Python polyplot legend selective display

Sometimes you need to draw multiple curves, and you need to draw multiple times. You can add handles to the curve drawing, then put the handles into variables, and then add legends to the saved handles.

Look at the picture

Look at the code

import matplotlib.pylab as pltdef get_v_value(t):t2=t*treturn t2if __name__ == '__main__':cycllist=[2,3,4]pllist=[]lgtextlist=[]fig1=plt.figure()colorlsit = ['red', 'salmon', 'slateblue', 'cyan', 'olive', 'purple', 'bisque']icolor=0for cycle in cycllist:htlist=[[1,10],[11,20],[21,30]]for thv in htlist:tmp = [cycle, get_v_value(cycle)]p1, = plt.plot([thv[0], thv[1]], tmp, color=colorlsit[icolor])icolor = icolor + 1labeltext = 'n=' + str(cycle)pllist.append(p1)lgtextlist.append(labeltext)plt.legend(pllist, lgtextlist)plt.show()