app3.py

import panel as pn

# Initial instructions
instructions = "# Teste"

# Create a Column container
main_column = pn.Column(pn.pane.Markdown(instructions))

# Function to update the main column
def update_main():
    # New instructions to be displayed
    new_instructions = "## Updated Teste"

    # Create a new Markdown pane with the updated instructions
    updated_pane = pn.pane.Markdown(new_instructions)

    # Clear the main_column and replace it with the updated pane
    main_column.clear()
    main_column.append(updated_pane)

# Layout using Template
template = pn.template.FastListTemplate(
    title="EasySciRead",
    main=[
        main_column,  # Use the Column container in the main layout
    ],
    accent_base_color="#88d8b0",
    header_background="#FFFFFF",
    header_color="#000000",
    text_align='center',
    sidebar_width=150
)

# Run the app
template.servable()