Delete lines in matplotlib

I need to delete all the lines on a subplot, to then redr开发者_如何学Pythonaw them (i'm making a redraw function to be used when i add/remove some lines) How do I do it?

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If you have the Axes object stored, you reference each line by the lines member:

ax = fig.add_subplot(111)
ax.plot(line one)
ax.plot(line two)
# plot
ax.lines.pop(0) # removes the first line
# plot again

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ax.lines is just a Python list

ax = plt.gca()
ax.lines.clear()