[Python] Matplotlib Zorder not respected between Bar and Grid, why?

My Matplotlib version is 3.7.2

Here is a code where gridlines zorder > bars zorder:

import matplotlib.pyplot as plt
import numpy as np

# Sample data
x = np.arange(4)
y1 = [5, 7, 3, 6]
y2 = [4, 6, 5, 7]

# Create figure with 2 subplots
fig, axs = plt.subplots(1, 2, figsize=(8, 4), dpi=120)

# Plot on subplot 1
axs[0].bar(x, y1, color='skyblue', zorder=1.49999)
axs[0].set_title("Subplot 1")
axs[0].grid(True, zorder=10)

# Plot on subplot 2
axs[1].bar(x, y2, color='salmon', zorder=1.5000001)
axs[1].set_title("Subplot 2")
axs[1].grid(True, zorder=10)

plt.show()


and the result is :



so it seems there's a boundary of 1.5 for bars zorder ? that's strange

What is also strange is when i add axs.set_axisbelow(False) on both axes, the boundary seems to be 2.5...

What am i doing wrong ?

Continue reading...