问题 The goal is to get vertical infinite lines in every subplot, at x=1. In this example, I'll just try a single plotly shape of type="line" in the first row, first column from plotly.subplots import make_subplots import plotly.graph_objects as go import numpy as np fig = make_subplots( rows=2, cols=2, subplot_titles=list(map(str, range(4))), shared_xaxes=True, shared_yaxes=False, ) time = np.linspace(-np.pi, np.pi, 1000) for i in range(4): data = np.sin((i+1) * time) fig.add_trace( go.Scatter(y