[Matplotlib-users] turning off tick marks

[Jeff P. <je...@gm...>]

can someone tell me how to turn off the tick marks on my plot?

i tried this

    [line.set_marker('None') for line in ax.get_xticklines()]

but this turns off the labels too.  i don't want to turn off the
labels, just the tick marks.

someone also suggested this

   ax.xaxis.set_major_locator(pylab.NullLocator())

but it also turns off the labels