How to Set Transparent Background for Plotly Plot?

Setting a transparent background for a Plotly plot can be accomplished using different methods depending on the use case. In this answer, I will provide some examples of how to achieve this.

• Method 1: Using the "layout" parameter
• Method 2: Using the "config" parameter
• Method 3: Using the "to_image" function

Method 1: Using the "layout" parameter

One simple way to set the background of a Plotly plot to transparent is by using the "layout" parameter. In the "layout" parameter, you can set the color of the background to "rgba(0,0,0,0)", which stands for "red, green, blue, alpha", where "alpha" is the opacity level, and setting it to 0 makes the background fully transparent. Here's an example:

import plotly.graph_objects as go

fig = go.Figure()

# Add traces to the figure

fig.update_layout(
    paper_bgcolor='rgba(0,0,0,0)',
    plot_bgcolor='rgba(0,0,0,0)',
)

fig.show()

In this example, we create an empty figure and add traces to it. Then, we set the paper_bgcolor and plot_bgcolor parameters to rgba(0,0,0,0) to make the background transparent.

Method 2: Using the "config" parameter

Another way to set the background of a Plotly plot to transparent is by using the "config" parameter. In the config parameter, you can set the displayModeBar parameter to False to remove the toolbar from the plot, and set the staticPlot parameter to True to disable interactivity. Here's an example:

import plotly.graph_objects as go

fig = go.Figure()

# Add traces to the figure

fig.show(config={'displayModeBar': False, 'staticPlot': True})

In this example, we create an empty figure and add traces to it. Then, we set the displayModeBar parameter to False to remove the toolbar from the plot, and set the staticPlot parameter to True to disable interactivity.

Method 3: Using the "to_image" function

Finally, you can also export the Plotly plot to an image format and set the background of the image to transparent. In this case, we can use the to_image function from the plotly.io module to export the plot to a PNG image format with a transparent background. Here's an example:

import plotly.graph_objects as go
import plotly.io as pio

fig = go.Figure()

# Add traces to the figure

image_bytes = pio.to_image(fig, format='png', engine='kaleido', width=800, height=600, scale=2, transparent=True)

with open('my_plot.png', 'wb') as f:
    f.write(image_bytes)

In this example, we create an empty figure and add traces to it. Then, we use the to_image function to export the plot to a PNG image format with a transparent background. We set the transparent parameter to True to make the background transparent.

See also: python - Setting Background color to transparent in Plotly plots - Stack Overflow