add_vline not rendering properly with secondary y-axis

Hello,

I encountered a problem, when using add_vline with a secondary y-axis and no data on it.

plotly.py version: 5.5.0

Minimum example:

import plotly.graph_objects as go
from plotly.subplots import make_subplots

fig = make_subplots(
    specs=[[{"secondary_y": True}]],
)

# Uncomment the line below to "fix" the problem
# fig.add_trace(go.Scatter(x=[0, 1], y=[2, 3]), secondary_y=False)
fig.add_trace(go.Scatter(x=[4, 5], y=[6, 10]), secondary_y=True)
# Change secondary_y to True to also "fix" the problem
fig.add_vline(4.5, exclude_empty_subplots=False, secondary_y=False)

Expected behavior:
The add_vline should a vertical line to the plot no matter if it has traces or not. How the plot looks like, when following the second comment.

Best regards
Julian

まず、plotly.py 5.5.0 を使用して issue の最小例を実行し、主軸にデータがない場合の add_vline の動作を確認します。コメントアウトされた trace の場合および secondary_y=True の場合と結果を比較します。対象の軸に trace がない場合でも、要求された軸に垂直線が描画されれば完了です。