问如何强制显示plotly.express中每个子图的x-轴和y-轴

EN

import numpy as np
import pandas as pd
import plotly.express as px

# create a dummy dataframe with lots of variables
rng = np.random.default_rng(42)
n_vars = 3
n_samples = 10
random_vars = [rng.normal(size=n_samples) for v in range(n_vars)]
m = np.vstack(random_vars).T
columns = pd.MultiIndex.from_tuples([('a','b'),('a','c'),('b','c')],names=['src','tgt'])
df = pd.DataFrame(m,columns=columns)

# convert to long format
df_long = df.melt()

# plot with plotly
fig = px.histogram(df_long,x='value',facet_row='src',facet_col='tgt')
fig.update_layout(yaxis={'side': 'left'})
fig.show()