Frequently asked questions

Syntax, keywords and built-in functions

Standard distribution

import implementation

Browser interface

Brython-specific built-in modules

Working with Brython

Brython for Firefox OS




Show information when the mouse is over an area of the image


We will use the onmouseover atribute of the area HTML tag. A text will be shown on screen depending on the position of the mouse :

from browser import document, html

def writetext(txt):
    # write text in the description zone (white on red)
    document["description"].text = txt

coords = [(0,0,160,95),(180,0,400,165),(0,120,180,400),(175,235,270,400)]
messages = ['This plane was flying to wonderland in a sunny day',
    'The Sun and the gas giant planets like Jupiter are by far the largest \
    objects in our Solar System.',
    'This is me or you.',
    'Dennis the menace!!!!!!!!']
prompt = 'Mouse over the items in the image to see the different \


for coord, msg in zip(coords, messages):
    # define areas in the image
    area = html.AREA(shape="rect", coords=coord)
    # define actions when mouse moves over or out of the area
    area.bind('mouseover', lambda ev, msg=msg:writetext(msg))
    area.bind('mouseout', lambda ev:writetext(prompt))
    document["familymap"] <= area

Happy Family