[Python] Remove axis ticks but keep grid using Matplotlib / ggplot style

I know that this is a "duplicate" question (Remove the x-axis ticks while keeping the grids (matplotlib)) but the answers that I found didn't solve my problem.

For example, I have this code:

%matplotlib inline

from matplotlib import pyplot as plt
from matplotlib.lines import Line2D

import bumpy

data = numpy.random.randint(0, 100, size=(100,100))

plt.style.use('ggplot')
plt.figure(figsize=(10,10))
plt.imshow(data)

plt.savefig('myplot.pdf', format='pdf', bbox_inches='tight')
plt.close()


Which produces this plot:



However, I want to end up with a plot without any ticks, just the grid. Then, I tried this:

plt.figure(figsize=(10,10))
plt.imshow(data)
plt.grid(True)
plt.xticks([])
plt.yticks([])


Which removes all ticks and grids:



At last, if try this:

plt.figure(figsize=(10,10))
plt.imshow(data)
ax = plt.gca()
ax.grid(True)
ax.set_xticklabels([])
ax.set_yticklabels([])


I get closer but my .pdf still have some ticks outside the plot. How do I get rid of them, keeping the internal grid?



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