I would like to add a constant horizontal line on a seaborn catplot for all the subplots that was created - here is my codes :

```
sns.set()
fig = sns.catplot(x="LARGF", y="F_tot", hue="pass_inv", col="EPF", data=df_pi1_2_ag, kind="boxen", height=10, aspect=.7)

```

[enter image description here](https://i.stack.imgur.com/2CGUM.png)