Circular Import Dependency in Plotly Templates

The issue is that plotly's template system has a circular import dependency:

1. plotly.graph_objs.__init__.py imports all trace types including Heatmapgl
2. During this import process, it also loads template data
3. layout/template/data/_heatmapgl.py tries to import Heatmapgl from plotly.graph_objs
4. But plotly.graph_objs is still in the process of being imported!

This occurred when attempting to use plotly and plotly-resampler and a heatmap.

Reproduction of Error

Minimal reproduction code:

import plotly.graph_objs as go
go.Heatmapgl()  # ✅ Success

# But this fails:
from plotly_resampler import FigureResampler
fig = FigureResampler(go.Figure())  # ❌ Circular import

Versions affected:

plotly==5.24.1
plotly-resampler==0.10.0

Work around

This can be worked around by forcing import order:

import plotly.graph_objs  # Force full initialization first
from plotly_resampler import FigureResampler  # Then import resampler

Tái hiện lỗi với plotly==5.24.1 và plotly-resampler==0.10.0, sau đó kiểm tra plotly.graph_objs.init.py và layout/template/data/_heatmapgl.py. Truy vết thứ tự import từ ví dụ FigureResampler đã được báo cáo. Được xem là hoàn tất khi ví dụ import và tạo figure mà không yêu cầu phải import thủ công plotly.graph_objs trước.