如何为ipywidgets按钮文本的指定部分设置加粗样式？

The default Button widget in ipywidgets doesn't support HTML formatting in its description property—any tags you add will show up as literal text instead of being rendered. To get bold text in your button, you can use an HTML widget styled to look like a button, since HTML widgets can render formatted text and can still respond to click events.

Here's how to modify your code to achieve this:

from IPython.display import Javascript, display
from ipywidgets import widgets, Layout

def run_all(ev):
    display(Javascript('IPython.notebook.execute_cell_range(IPython.notebook.get_selected_index()+1, IPython.notebook.get_selected_index()+2)'))

# Create an HTML widget with bolded text, styled to match your original button
styled_button = widgets.HTML(
    value='This is a <b>blue colored earth</b>',
    layout=Layout(
        width='70%',
        height='40px',
        padding='8px 0',  # Vertical padding to center text
        border='none',
        border_radius='4px',  # Rounded corners like the default button
        background_color='#ff9838',
        color='#FFFFFF',
        text_align='center',
        cursor='pointer',  # Show hand cursor on hover
        font_size='14px'
    )
)

# Attach the click handler to the HTML widget
styled_button.on_click(run_all)

display(styled_button)

Key Changes Explained: #

• Replaced the Button widget with an HTML widget, which allows us to use <b> tags to bold the desired text segment.
• Styled the HTML widget using Layout properties to match the appearance of your original button: same background color, text color, width, height, and rounded corners.
• Added cursor='pointer' to make it clear the element is clickable, just like a standard button.
• Kept your original run_all function and attached it to the HTML widget's on_click event, so the functionality remains identical.

This approach will render the button with "blue colored earth" in bold, while maintaining the same behavior as your original button.

内容的提问来源于stack exchange，提问作者Mufeez