markevery only accepts builtin integers, not numpy integers #8057
Description
mpl 2.0/py 3.6
plot(range(10), ".", markevery=3) works, but plot(range(10), ".", markevery=np.int_(3))' fails with
Traceback (most recent call last):
File "/usr/lib/python3.6/site-packages/matplotlib/backends/backend_qt5agg.py", line 197, in __draw_idle_agg
FigureCanvasAgg.draw(self)
File "/usr/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py", line 464, in draw
self.figure.draw(self.renderer)
File "/usr/lib/python3.6/site-packages/matplotlib/artist.py", line 63, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib/python3.6/site-packages/matplotlib/figure.py", line 1143, in draw
renderer, self, dsu, self.suppressComposite)
File "/usr/lib/python3.6/site-packages/matplotlib/image.py", line 139, in _draw_list_compositing_images
a.draw(renderer)
File "/usr/lib/python3.6/site-packages/matplotlib/artist.py", line 63, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib/python3.6/site-packages/matplotlib/axes/_base.py", line 2409, in draw
mimage._draw_list_compositing_images(renderer, self, dsu)
File "/usr/lib/python3.6/site-packages/matplotlib/image.py", line 139, in _draw_list_compositing_images
a.draw(renderer)
File "/usr/lib/python3.6/site-packages/matplotlib/artist.py", line 63, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib/python3.6/site-packages/matplotlib/lines.py", line 851, in draw
affine, self.axes.transAxes)
File "/usr/lib/python3.6/site-packages/matplotlib/lines.py", line 233, in _mark_every_path
'markevery=%s' % (markevery,))
ValueError: Value of `markevery` is not recognized; markevery=3
This is due to the use of isinstance(..., int) in the relevant codepath.