Hide errobar under hollow points in Matplotlib

I want to plot data with errors. The data points are hollow diamonds and I do not want the part of the error showing inside the hollow diamonds. I just want it to show on outside the diamonds, leaving the inside empty. The code part I use is:

plt.errorbar(x=unknown['asd'], y=(unknown['dsa'])*-10, 
xerr=unknown['asderr'], yerr=(unknown['dsaerr']*-10), linestyle="None", fmt='D', markersize=7, 
ecolor='b', elinewidth=0.2, capsize=0.05, markerfacecolor='white', markeredgecolor='blue',
label=None, alpha=0.6)

I tried to use zorder :

plt.errorbar(x=unknown['asd'], y=(unknown['dsa'])*-10, 
xerr=unknown['asderr'], yerr=(unknown['dsaerr']*-10), linestyle="None", fmt='D', markersize=7, 
ecolor='b', elinewidth=0.2, capsize=0.05, markerfacecolor='white', markeredgecolor='blue',
label=None, alpha=0.6, zorder=1)

plt.plot(unknown['asd'], (unknown['dsa'])*-10, marker='D', markerfacecolor='none', markeredgecolor='blue', 
markeredgewidth=1, markersize=7, linestyle='None', zorder=2, alpha=0.6)

but I still see the errorbars passing through the hollow diamonds. Is there any quick way to make the errorbar line not shown under the hollow parts?

This is due to the alpha value set in the plt.errorbar call.

Here is a simpler example of what you're doing:

import matplotlib.pyplot as plt

markers_style = dict(fmt='D', markersize=20, markerfacecolor='white', markeredgecolor='blue')
lines_style = dict(ecolor='b', elinewidth=1, capsize=0.05)

plt.errorbar(x=10, y=10, xerr=0.5, yerr=0.5, **markers_style, **lines_style, alpha=0.6)

Removing alpha=0.6, you'll obtain the following figure

For some reason, you might want to keep the alpha value in the errobar call. In this case, to achieve the desired figure you'll have to create a second plot (plt.plot or plt.scatter) to hide the center of each hollow diamond.

# [...]
plt.errorbar(x=10, y=10, xerr=0.5, yerr=0.5, **markers_style, **lines_style, alpha=0.6)

plt.plot(10, 10, marker='D', c="w", markersize=20)