使用 plotly/dash 为绘图创建背景图像

本文介绍了使用 plotly/dash 为绘图创建背景图像的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在尝试为带有背景图像的 plotly/dash 创建一个绘图.绘图已创建，但背景图像未创建.文件和图片在同一个目录下.

I'm trying to create an plot for plotly/dash with a background image. The plot is created, but the background image doesn't. The file and the image are located in the same directory.

我错过了什么吗?

import base64 import dash import dash_core_components as dcc import dash_html_components as html import plotly.graph_objects as go IMAGE_FILENAME1 = 'link.png' image1 = base64.b64encode(open(IMAGE_FILENAME1, 'rb').read()) fig = go.Figure( data=[go.Bar(y=[2, 1, 3])], layout_title_text="Native Plotly rendering in Dash" ) fig.update_layout( images= [dict( #source="KU.png", source='data:image/png;base64,{}'.format(image1.decode()), #xref="container", #yref="container", layer="below")]) app = dash.Dash(__name__) app.layout = html.Div([ dcc.Graph(id="graph", figure=fig), ]) app.run_server(debug=True)

获取无花果的属性:

fig Figure({ 'data': [{'type': 'bar', 'y': [2, 1, 3]}], 'layout': {'images': [{'layer': 'below', 'source': ('data:image/png;base64,iVBORw0K' ... 'Q7B0QA13afSQHVAAAAAElFTkSuQmCC')}], 'template': '...', 'title': {'text': 'Native Plotly rendering in Dash'}}

推荐答案

我的建议可能无法解决问题，因为不清楚图像不显示什么样的图形.我试图用你的代码显示我的图像.我修改的唯一代码是下面一行.

My suggestion may not solve the problem, since it is unclear what kind of graph the image does not show. I have tried to display the image I have with your code. The only code I modified is the following one line.

import base64 import dash import dash_core_components as dcc import dash_html_components as html import plotly.graph_objects as go from jupyter_dash import JupyterDash IMAGE_FILENAME1 = './data/plotly_graphing_libraries_1.png' image1 = base64.b64encode(open(IMAGE_FILENAME1, 'rb').read()) app = JupyterDash(__name__) # app = dash.Dash(__name__) fig = go.Figure(data=[go.Bar(x=[0,1,2], y=[2, 1, 3])], layout_title_text="Native Plotly rendering in Dash") fig.add_layout_image(dict(source='data:image/png;base64,{}'.format(image1.decode()), xref="x", yref="y", x=0, y=3, sizex=2, sizey=2, sizing="stretch", opacity=0.5, layer="below")) fig.update_layout(template="plotly_white") app.layout = html.Div(children=[ dcc.Graph(id="graph", figure=fig), ]) app.run_server(mode='inline')